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Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aims to clarify the effects of long-term different fertilization on the soil fertility and grain yield under the continuous maize cropping system in coal mining subsidence areas. The key soil factors were determined in the fertilization treatments for the high maize yield. Four treatments were set with no fertilization (CK), nitrogen, phosphorus and potassium fertilizer (NPK), organic manure alone (M), and organic manure combined with chemical fertilizer (MNPK). Soil samples were also collected in the 0-20 cm thickness. A systematic investigation was made to explore the effects of fertilization treatments on the crop yield, contents of soil organic matter (SOM), total nitrogen (TN), available phosphorus (AP), available potassium (AK), available iron (A-Fe), available manganese (A-Mn), available copper (A-Cu), available zinc (A-Zn), the distribution of aggregates and associated carbon and nitrogen content, as well as the enzyme activities related to carbon cycle. The results showed that the NPK, M and MNPK treatments significantly increased the maize grain yield, especially for M treatment, compared with the CK treatment. M treatment significantly increased the SOM, TN, AK, and A-Mn contents, which increased by 21.50%, 12.50%, 98.37%, and 20.19%, respectively. MNPK treatment was improved the properties of the reclaimed soil. There was the significant increase in the > 2 mm aggregate associated with organic carbon and total nitrogen contents, which were 68.68% and 471.43%, respectively. But the soil A-Cu, and A-Zn contents were reduced by 16.67% and 16.46%, respectively. Moreover, the application of manure (M and MNPK) accelerated the crushing of large macroaggregate (0.25- 2 mm), accompanied by the increase of the proportion of silt and clay fraction (< 0.053 mm). In addition, NPK treatment significantly increased the activity of β-glucosidase by 29.17%, but the urease activity was reduced by 29.79%. M and MNPK treatment significantly increased the activities of sucrase, β-glucosidase, urease and alkaline phosphatase, with the increases of 45.87%-73.39%, 54.98%-60.73%, 43.09%-80.32% and 51.52%-54.97%, respectively. Furthermore, the principal component analysis showed that the application of organic manure alone was the better management measure to improve the quality of cultivated land and maintain land productivity in this reclaimed area. The redundant analysis showed that β-glucosidase was a sensitivity index to evaluate the soil fertility, which was contributed 72.40% to the maize grain yield and SOM content. Therefore, the application of organic manure alone can be expected to promote the formation of soil fertility of reclamation under the existing farmland management. The activity of β-glucosidase was enhanced to ultimately improve the crop yield. The effective measure can also be used to maintain the high and stable crop yield for the cultivated land quality in this reclaimed area. The finding can provide a theoretical basis for the improvement of soil and cultivated land quality.. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Understanding the relationship between hydrological and sediment connectivity under extreme rainfall conditions is of great significance for water and sediment regulation and high-quality development of soil and water conservation in the basin under the new situation of vegetation restoration in the Loess Plateau. In this study, the influence of extreme rainfall and vegetation restoration on water-sediment connectivity and the characterization ability of sediment transport potential was analyzed based on the index of connectivity, the structural sediment connectivity (SCst) improved by topographic location index and vegetation cover factor, the functional hydrological connectivity (HCfn) improved by the cumulative surface runoff depth factor. The results showed that the rainfall and vegetation were the main functional and structural factors affecting hydrological and sediment connectivity, respectively. The mean value of normalized difference vegetation index (NDVI) increased by 0.41 from 2000 to 2020, while the mean value of sediment connectivity decreased by 3.54, with a negative correlation coefficient of −0.93. The spatio-temporal distribution of rainfall was in good agreement with the spatio-temporal distribution of hydrological connectivity, both of which were highly correlated on the monthly scale. When extreme rainfall occurred, rainfall runoff factors played a dominant role and determine hydrological and sediment connectivity. The improved water-sediment connectivity index was well applied to the study of large-scale watershed connectivity in the Loess Plateau. Pearson correlation analysis showed that the functional hydrolodical connectivity had a good correlation with runoff and sediment transport capacity in the basin under the inter-annual and seasonal variation, and could better reflect the phenomenon of runoff and sediment increase in the basin under extreme rainfall. Compared with previous studies in which functional connectivity was calculated by using factors such as rainfall erosivity under annual changes, which could not well characterize the actual sediment transport capacity of the basin, the functional connectivity used in this study had obvious advantages, which would provide a more direct and effective tool for water and sediment management in large basins on the Loess Plateau in the future. The interaction between basin structure and functional connectivity changed significantly with seasons. In dry season, vegetation cover was low, rainfall was low, structural sediment connectivity was high and HCfn was increasing. At this time, SCst had a weak influence on HCfn, and the two showed a high negative correlation. In the wet season, with sufficient rainfall and lush vegetation, the correlation between structure and work connectivity changed with the trend of rainfall. At this time, the SCst was low, which limited the function of HCfn to a certain extent. When encountering extreme rainfall, high-intensity rainfall runoff played a dominant role, and SCst couldn’t significantly affect HCfn, while HCfn changed SCst in turn, and both increased at the same time, showing a strong positive correlation. In the normal water season, vegetation gradually withered due to the weakening of rainfall intensity, SCst increased while HCfn decreased, and the negative correlation between the two was enhanced. In conclusion, the improved water-sediment connectivity index has certain advantages and limitations, which can provide guidance for water and sediment management and ecological construction of large watershed in the Loess Plateau under the changing environment in the new era. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article aims to clarify the effect of modification on the film performance and in vitro release pattern of hard capsules coated with the zein-glu film. The zein was modified using wet-heating glycosylation with glucose. The film performance after the modification was determined, including the mechanical properties, moisture resistance, oxygen resistance, oil resistance, and intestinallysis. The results showed that the film tensile strength of modified products significantly increased by 4.67 to 34.06 MPa (P<0.05), compared with the unmodified zein film, indicating that the wet modification effectively improved the brittleness of raw materials. The water absorption rate of zein film reached the maximum of 45.71% at 60 h, whereas, that of the zein-glu film reached a maximum of 84.98% at 24 h. The water absorption of the film might have been improved by wet-heating glycosylation with glucose. The reason was also that the zein introduced hydrophilic carbonyl glucose through glycosylation modification, thereby enhancing the absorption capacity of the modified product in the surrounding environment. The peroxide value of cling, zein, and zein-glu films were 0.55 g/100 g, 0.49 g/100 g, and 0.43 g/100 g, respectively, lower than that of commercially available plastic wrap. There was a great increase in the hydrogen, disulfide, and hydrophobic bonds closely connected between molecules after modification. The formed film with dense space structure presented relatively oxidation resistance. In water resistance of the film, the water vapor transmission rate of zein and zein-glu film enhanced slowly after 7 minutes, and then gradually stabilized after 32 minutes, finally decreased with time. The zein film after glycosylation modification behaved always a lower transmission rate of water vapor, compared with the unmodified. The water vapor transmission rate of the zein-glu membrane dropped to 7.89×10-8g·m/(m2·d·Pa), when it reached a plateau, indicating a higher transmission rate of water vapor in the modified film through wet heat with glucose. The oil permeability coefficient of the zein-glu film was 0. The oil resistance of the zein-glu film was similar to that of commercially available cling film. Consequently, the zein-glu film presented excellent barrier properties after modification. In addition, the oil resistance of the zein-glu film was better than that of zein film, indicating that the oil resistance of the zein-glu film was improved significantly. After that, the release pattern was determined, when the zein-glu film was filled with low molecule rhodamine B. Statistical analysis was performed on SPSS software. It was found that the zein-glu-made capsule was broken in the intestinal juice, but kept the film intact in the gastric juice, indicating the classic Enteric-coated capsules. Fitting the coefficient of determination of the simulated in vitro release mathematical model R2 was 0.800.The model was further verified using the chi-square, correlation, and significant test of t statistics. [ABSTRACT FROM AUTHOR]

Core browning in Korla pear (Pyrus bretschneideri Rehd.) occurs generally during storage at room temperature. The browning disorder can significantly reduce the shelf stability, and thereby to cause considerable economic losses. Moreover, the browning part of pears can be taken in the juicing process, leading to the juice toxins over the safety limit for drinking. Therefore, a reliable and rapid method has been urgently demanding to nondestructively detect internal disorder for high-quality fruits. In this study, an acoustic system using the piezoelectric beam transducers was developed for nondestructively detecting disorder of pears with different internal browning. The obtained response signals were analyzed to extract 11 statistical features in time domain, and seven statistical features in frequency domain. Accordingly, three modes of feature vectors were formed in the time domain, frequency domain, and time-frequency domain. A Compensation Distance Evaluation Technology (CDET) was also used to evaluate the sensitivities of each parameter in feature vectors. Normally, the larger values of sensitivity evaluation factor can imply the higher sensitivities to the browning classes of pears. Based on sensitivity evaluation factors values in the healthy and browning of pears, the descending order of 11 time-domain features were the mean (T1), shape factor (T11), kurtosis (T6), square root amplitude value (T5), clearance indicator (T8), peak (T3), impulse factor (T9), root mean square (T2), short-time energy (T4), kurtosis factor (T7), and crest factor (T10). The sensitivities of seven frequency-domain features were also ranked in order, the variance (F2), mean square (F6), root mean square (F7), standard deviation (F3), mean (F1), kurtosis (F4), and gravity (F5). Combining two types of features, the descending order of all the features was as follows: T11, F2, T6, T5, F7, F6, T1, F3, F4, F1, F5, T8, T3, T9, T2, T4, T10, and T7. In the slight browning and moderate browning of pears, the sensitivities of time-domain features can be ranked in the descending order of T7, T11, T8, T3, T9, T10, T6, T2, T5, T4, and T1. The obtained order for the frequency-domain features was F4, F3, F7, F6, F1, F5, and F2. In the combined time-frequency features, the order was as follows: T11, T8, F6, T3, F7, F3, T7, F4, F1, F2, T9, F5, T10, T6, T2, T5, T4, and T1. Subsequently, a K-nearest neighbor (KNN) algorithm was utilized to train the classifier using the first n sensitive features as the inputted data. Therefore, a browning discrimination model was constructed for the moderate disorder, whereas, a slight browning discrimination model for the mild disorder. Both models performed the best, when combining the features from the time-domain and frequency-domain. In the browning discrimination model, a high overall accuracy of 91.84 % was obtained with the specific feature vectors, including three time-domain features (T11, T6 and T5), and one frequency-domain feature (F2). In slight browning discrimination model, the slight browning of pears can be further identified with an accuracy of 81.82 %. In the case of slight browning, the specific feature vectors were adopted, including two time-domain features (T11 and T8), and one frequency-domain feature (F6). In the confusion matrix analysis, the high values of F1 indicated that two discrimination models can be used to achieve the high robustness and performance, and further to be generalized for the identification of fruits. These findings can provide a sound theoretical basis and strategy for the industrial real-time in-line detection, and automatic grading in the internal browning disorder of pears. [ABSTRACT FROM AUTHOR]

As a kind of rural residential regions, scattered residential regions in the fields are the inevitable outcome of large-scale habitat-based regions that cannot meet the needs of agricultural planting activities. The rapid development of scattered residential regions in the fields would reduce the effective cultivated land region and cause waste of land resources. Therefore, in order to clarify the influence mechanism of scattered residence pattern in Heilongjiang reclamation region, taking 859 Farm under the jurisdiction of Jiansanjiang Administration Bureau of Heilongjiang reclamation area as the research region, this paper used spatial analysis, coupling degree model, multivariate statistical analysis to explore the influence mechanism of scattered residence pattern. The results show that: 1) 859 Farm has both large-scale habitat-based regions and scattered residential regions in the fields. The number of habitat-based regions is relatively small and the land use mode is relatively intensive. However, some farmers still own scattered residential regions in the fields while owning large-scale habitat-based regions, and the number is relatively large, about 15 times that of large-scale habitat-based regions. It also shows the spatial differentiation characteristics of dense central region and sparse east and west, resulting in extensive residential land use in the study region, reducing the effective cultivated land region and intensifying the contradiction between supply and demand of farm land resources. 2) The average value, the maximum value and the median value of the coupling degree between scattered residential regions in the fields and agricultural planting activities in the study region are 0.52, 1.00 and 0.60, respectively. The coupling degree between the systems is relatively high. Moreover, the spatial differentiation characteristics of coupling degree between scattered residential regions in the fields and agricultural planting activity system and the distribution state of kernel density show spatial consistency. Agricultural planting activities are related to scattered residential regions in the fields to a certain extent, so cultivated land structure, cultivated land region, field fragmentation, tillage radius and deviation distance are the influencing factors of scattered residential regions in the fields in the study region. 3) The main factors influencing the pattern of scattered residential regions in the study area are the attributes of cultivated land (tillage radius, cultivated land region, fragmentation degree of cultivated land) and the status of cultivated land use (cultivated land structure), while the influence of deviation distance is slightly small and is not the main factor. Cultivated land structure and tillage radius are the direct factors, while cultivated land region and field fragmentation are the indirect influencing factors. The mismatch between cultivated land structure and tillage radius makes the study region show the regional characteristics of gathering in the middle and dispersing in the east and west. [ABSTRACT FROM AUTHOR]

The cotton areas in Xinjiang exceeded 2.5×106 hm² by the end of 2018, making Xinjiang the biggest cotton producer (accounting for 80% of the national cotton areas) in China. In most cotton fields in Xinjiang, the rows are spaced 560 - 760 mm and intra-row plants are spaced 96-100 mm. The average cotton yield in southern Xinjiang was approximately 7500 kg/ hm², compared with 6000 kg/ hm² in the north. Since Xinjiang is in hinterland of Eurasia, having ample sunshine, scarce precipitation and high evaporation, irrigation is essential to safeguard its agricultural production. To keep soil moisten, the planting strips for cotton are often mulched by plastic film before sowing seeds. Since natural degradation of plastic films is slow, an accumulative use of plastic film has led to soil structure degradation and environment deterioration. Recycling plastic film residuals is hence essential to developing sustainable agriculture but is challenging because the currently-used manual pick-up is labor intensive and inefficient while the available combine machines cannot separate the film residuals from cotton straw during the pick-up process. We designed a new machine aimed to solve this problem by combining film pick-up process and straw cutting-returning process. Differing from the available machines, the new one can separate the straw from the film residuals during pick-up and returning processes. It comprised a straw-cutting device, a film picking device and a film-lifting device, with all components purposely designed for cotton cultivated in Xinjiang. The operation depth of the film-lifting shovel was 54-178 mm. An orthogonal rotation test with three five-level factors was conducted to examine the impact of the speed of the spinning fling cutter, forward-speed and operation depth of the film-lifting shovel on passing rate of the crushing length, the residual film picking rate and the membrane miscellaneous separation rate from the straw. The variances were analyzed using Design-ExpertV8.0.6.1, and a regression model was used to evaluate the responsive performance of the machine to the above three operating parameters as well as their optimization. The results showed that the optimal spinning speed of the fling cutter was 1200r/min, the forward-speed was 4.5km/h, and the operation depth of the film-lifting shovel was 100mm. Field test results were consistent with these optimal parameters, with the straw crushing length pass rate being 89.37%, the residual film picking rate being 90.31%, and the membrane miscellaneous separation rate from the straw being 93.16%. It is manifest that the combine machine meets the technological requirements, improved plastic film residuals recycle efficiency and ameliorated their environmental pollution. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ozone treatment is considered as an effective and non-polluting method of storage and preservation, and the strong oxidizing effect of ozone is also considered to have an effect on the active oxygen scavenging system of harvested fruits and vegetables. The inhibition of reactive oxygen species of non-enzymatic, enzymatic scavenging system of post-harvest ‘Jing Tao Xiang’ strawberry，which are wide-planted in Tianjin, treated with different ozone concentrations (0, 2.144, 6.432, 10.72 and 15.008 mg/m3) was investigated in this study. Post-harvest strawberries were treated for 5 h every 7 days in an ozone preservation device independently developed by the National Preservation Engineering Technology Research Center (Tianjin), and then quickly transferred to a 4 °C cold storage. Total phenols content (TPC), total flavonoids content (TFC), and ascorbic acid (ASA) were detected as key non-enzymatic antioxidants, while superoxidase (SOD), peroxidase (POD), and ascorbate peroxidase (APX) were detected as key enzymes in the enzymatic antioxidant system. Results showed that for non-enzymatic antioxidant system, the total phenolics of post-harvest strawberry in the ozone treatment group of 2.144, 6.432 and 15.008 mg/m3 had a certain accumulation during the whole storage period, but lower than the control group. The content of flavonoids in the 2.144 and 15.008 mg/m3 treatment groups decreased continuously throughout the storage period, while the content in the 6.432 mg/m3 treatment group decreased and then increased, but the contents in the three treatment groups were lower than the control group; the ASA content did not change much in the control group, but decreased continuously in the 2.144, 6.432 and 15.008 mg/m3 treatment groups, and the 15.008 mg/m3 ozone treatment group had the largest decline. Compared with the control group and other three different concentrations of ozone treatment group. However, 10.72 mg/m3 ozone treatment significantly promoted the formation of phenolic compounds and ascorbic acid, maintained the total flavonoid content at a higher level, and which was conducive to the formation and accumulation of non-enzymatic antioxidant nutrients. For the enzymatic antioxidant system, high concentrations of O3 treatment rapidly induced an increase in POD activity in strawberry fruit. However, as the storage time prolonged, the decreasing trend appeared rapidly in the 15.008 mg/m3 treatment group. Compared with the control group, the enzyme activity of the 2.14 mg/m3 concentration O3 treatment group did not change much, but the enzyme activity of the 6.432 mg/m3 treatment group was inhibited. However, the SOD activity of 10.72 mg/m3 ozone treatment group was significantly increased (P<0.05), and the maximum value was advanced, the activity of APX was also enhanced. The activity of POD enzyme activity of 10.72 mg/m3 O3 treatment group was stimulated, and the peak of POD activity was delayed. Overall, ozone treatment at a concentration of 10.72 mg/m3 could enhance the enzymatic reaction activity of the redox system of postharvest strawberry and increase the content of non-enzymatic reaction substances, which had a positive effect on the accumulation of antioxidants in postharvest strawberries and was conducive to improving the edible value and economic value of post-harvest strawberries. [ABSTRACT FROM AUTHOR]

High importance has been put by government on the issues of water and soil erosion which are the key factors for sustainable development of agriculture in the Loess Plateau. There is a considering number of models to resolve this problem after several year’s practice. From the perspective of relationship and coupling of agricultural eco-economic system, some crisis is hidden in the process of establishing benign coupling relationship of agricultural eco-economic system. To achieve sustainable development in the area of Loess Plateau, it is necessary to build win-win situation among ecology, economy and society. In this study, we selected panel data from 16 prefecture-level cities in Shaanxi, Gansu and Ningxia Province from 2007 to 2014. On the basis of previous researches, the subjective and objective comprehensive weighting method named Analytic Hierarchy Process (AHP) and Variation Coefficient Method (CPA) were adopted to measure the weights of the evaluation indicators from the qualitative and quantitative perspectives. Based on the coupling degree model, the degree of mutual influence between the water and soil erosion management system and the ecological agriculture development system was explored from the perspective of the geomorphological features and prefecture-level cities for understanding the consistency of the system development situation as a whole. Based on the coordination degree model, the internal elements relationship between water and soil erosion management system and ecological agricultural development system was explored from the perspective of geomorphological features and prefecture-level cities for understanding the interaction relationship and coordination of every factor under different coupling stages. Using the bivariate spatial autocorrelation model, the coupling coordinative degree between the benefits of soil and water loss treatment and the level of ecological agriculture were taken as a measurement index. The index of measuring level of coupling degree of water and soil erosion control efficiency and ecological agriculture development: global and local degree Moran I indexes were calculated using Geoda software. Combined with LISA clustering analysis, in this paper, we analyzed the spatial distribution correlation of coupling degree between water and soil erosion control efficient benefits and ecological agriculture development to explore the coupling coordination state and development trend between water and soil erosion management and ecological agriculture development. Also, in this paper, we wanted to find the general laws of coupling and coordination between two subjects in order to provide scientific basis for policy development. The results indicated that the coupling level of water and soil loss erosion control benefits and the development level of ecological agriculture were generally high in the research area, but the degree of coordination was low and the development trend of coupling and coordination was slow, it presented a "low level equilibrium" state. The overall spatial agglomeration was gradually strengthened, but the two levels were severely differentiated. There was a lack of necessary “radiation hubs” between the “high-high” agglomeration areas and “low-low” agglomeration areas. New agglomeration poles were badly needed to be trained. Based on the above conclusions, we proposed the following policy recommendations: 1) maintaining the momentum of coupling development, 2) radiating development models, technology, and experience actively, 3) increasing mutual support and cooperation among regions, 4) strengthening pilot research, 5) exploring key factors that stop coordinated development from multiple perspectives, 6) breaking through the bottleneck of coordinated development, 7) cultivate new agglomeration poles, 8) increasing system resilience, and 9) easing spatial agglomeration. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Renewable stand-alone energy power generation system is one of the effective ways which solve the problem of electric power supply for water quality monitoring buoy. Due to its unique application background and operating characteristics, there are still some problems to be considered and solved in the current design. In our work, the first step was to build a construction cost optimization model for PV-battery energy power with the constraints of the cost and dimension parameters and operating environments. That was, the model comprehensively and synergistically constructed an economical and reliable independent power supply model for water monitoring buoy under 5 conditions of buoy ontology cost, buoyancy, volume and weather etc. Furthermore, it was also vital to find the solutions of this model for getting the optimal design parameters of the renewable stand-alone energy power source for the water monitoring buoy. Firstly, the maximum continuous rainy days in the operating location was set by an RBF (radial basis function) neural network method. The 3 inputs were light intensity, temperature and relative humidity, and its output was daily generating capacity of photovoltaic power. When the daily generating capacity was less than zero, it was the rainy day without electricity output. And so the maximum continuous rainy days of poor photovoltaic power generation were effectively set by the historical meteorological data of the buoy operation place. Then, for the possible size deviations between the expected and the practical values, a fuzzy integer programming algorithm was proposed. The advocated solution fused the characteristics of Werners algorithm and cutting-plane method. It transformed the objective function and fuzzy constraints into the general constraints, and the Werners symmetric model was obtained. The cutting-plane method was used to get the integer solution of the model, which would optimize the design parameter configuration of PV-battery power source with the fluctuation tolerance. Later, the sensitivity analysis of the maximum consecutive rainy days was carried out to investigate the fluctuating effect of weather factor on the system stability. Finally, the simulation examples indicated that the maximum continuous rainy days could be reduced by 5 d, which meant to reduce 33.3% margin requirements of the storage battery. By the proposed fuzzy integer programming method, the parameters of electric power supply for the water quality monitoring buoy were obtained with the minimum construction cost and maximum fuzzy membership degree. It was helpful to overcome the fluctuation of the size of the buoy body in practice, which would improve the feasibility and effectiveness of the theoretical method applied. Sensitivity analysis showed that when the maximum continuous rainy days extended occasionally to 1 d, the power source still could support the running of water quality monitoring buoy. This research provides a feasible solution to the problems of the renewable stand-alone energy power generation system of water quality monitoring buoy. The simulated results have demonstrated the effectiveness and reliability of the proposed configuration optimization method. The method can not only give the comprehensive optimal scheme for the power source of the water quality monitoring buoy, but also combine local conditions to avoid subjective setting of key parameters. This research has focused on making high efficient research and application of the renewable stand-alone power supply for water quality monitoring equipment, and the presented results can also provide the reference for other similar equipments and facilities. [ABSTRACT FROM AUTHOR]