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Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office 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 Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office 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 Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office 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.)

The aims of this paper is to illustrate the importance of grain production in China's food security strategy based on the three Northeastern provinces (NEP) in the new period, which quantitative assessment of climate change under the background of the loss caused by meteorological disasters of regional food production is clarify. In this paper, using grain planting area, yield and agricultural disaster statistics from 1981 to 2020, comparison analysis grain production and disaster characteristics between NEP and the whole country respectively. The disaster-yield assessment model was used to estimate the disaster-yield loss and final yield of the NEP by inputting disaster data in recent 10 years, and the sensitivity and stability of the disaster-yield assessment model were re-tested. The results showed that :(1) from 1981 to 2020, the grain planting area and total output in NEP increased significantly, and the proportion of the total output of NEP increased steadily, and the proportion of the total output of the three northeast provinces reached 1/5 of the total output of the whole country by 2020. (2) The disaster situation in NEP showed a significant trend of first increasing and then decreasing. The incrasing of average grain yield during the past 40 years was 65.96kg⋅ha-1 and 252.5kg⋅ha-1 per year for NEP and the whole country, while the incrasing of average grain yield during the past 10 years was 52.6kg⋅ha-1 per year for NEP significantly. (3) From 2011 to 2020, the average affected area and affected area in China were 23704.5x10³ha and 11204.7x10³ha, respectively, and 3899.1x10³disasters of the whole country and the three northeastern provinces were significantly lower than those of the previous three years, making it the decade with the least severe disasters in 40 years. (4) The simulation accuracy of the disaster-yield assessment model was high. The linear regression coefficients (R²) of simulated grain yield and measured grain yield in Heilongjiang, Jilin and Liaoning provinces were 0.98, 0.90 and 0.88, respectively. The slopes were 1.05, 1.02 and 0.98 (P < 0.01), respectively. The loss rate of grain yield due to agro-disaster was 10.4%, 17.9% and 18.0% respectively in the three province, while which was more than 8.0%, 17.0% and 16.0% for 20a.years. (5) The model slightly overestimated the grain yield of Jilin and Liaoning in recent 10 years due to the overall light disaster situation. Based on the data from 1981 to 2010, the regional grain disaster loss assessment model was proved to be able to evaluate the loss of grain yield caused by meteorological disasters well, and had the performance of predicting grain yield, and has the feasibility of operational application. The impact of meteorological disasters on the grain output in northeast China is higher than the average level of disasters in the whole country. Considering that the grain output in Northeast China accounts for a high proportion of the national grain output, preventing the risk of agro-meteorological disasters in Northeast China in the new period is of great importance to guarantee the national food security. [ABSTRACT FROM AUTHOR]

Copyright of Plateau Meteorology is the property of Plateau Meteorology Editorial Office 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.)

(1) Background--In 2021, the forest chief system was fully implemented nationwide. Under this background, how to embed the forest-chief system into the forest resources management system in the state-owned forest areas and fully realize the comprehensive efficiency of forest supervision and protection policies has become an important issue in the forest areas at present. (2) Methods--Based on the field investigation of some typical forestry enterprises in the key state-owned forest areas, this paper systematically analyzed the forest resources management practice after the reform in the key state-owned forest areas at the present stage, summarized the new challenges faced by the forest resources management mechanism after the implementation of the forest chief system, and on this basis, put forward policy suggestions to help the forest chief system to be embedded in the forest resources management system in the key state-owned forest areas. (3) Results--First, the forest chief system was carried out in the key state-owned forest areas, and the state-owned forest industry enterprises were incorporated into the local forest chief system through the organization of personnel. Second, the managers in different state-owned forest industry enterprises served as forest chiefs in different forms. Among them, the enterprise managers of China Longjiang Forest Industry Group Co., Ltd., Yichun Forest Industry Group and Daxing' anling Forestry Group participated in the forest chief system by serving as deputy forest chief of their respective counties (cities or districts). The managers of Jilin Forest Industry Group Co., Ltd.and Changbai Mountain Forest Industry Group served as the general forest chief of their respective forestry bureaus in accordance with the county-level forest chief system. As one of the six major areas of responsibility under the forest chief system in Inner Mongolia Autonomous Region, Inner Mongolia Forest Industry Group appointed deputy forest chief to manage forest resources. (4) Conclusions and Discussions--The implementation of forest chief system in the key state-owned forest areas faces a series of challenges. First, in the process of realizing the policy goal of forest chief system in the key state-owned forest areas, the forest resources management in the forest areas needs to be systematically integrated in the goal setting. Second, under the background of the overall implementation of forest chief system, the forest resources management in the key state-owned forest areas has a pattern of "dual-track and parallel". Third, the coordination mechanism of forest resources management under the forest chief system in the key state-owned forest areas is not perfect, including the government-enterprises coordination mechanism and the social participation mechanism. Based on the above analysis, the following policy suggestions are put forward. First, promote the integration of forest resources management objectives based on the reality of the key state-owned forest areas. Second, develop a list of forest chief powers to clarify the boundaries of responsibilities and powers of forest resources management under the forest chief system. Third, accelerate the establishment of the working mechanism of forest resources management under the forest chief system. In short, when promoting the forest resources management under the forest chief system in the key state-owned forest areas, the appeals of the central government, local governments, forest industry enterprises, forest residents and other parties must be comprehensively considered, the work objectives of the forest chief system must be clearly defined, the work content of the forest chief system must be enriched, and the objectives of integrating ecological benefits, social benefits and economic benefits must be formulated. [ABSTRACT FROM AUTHOR]

The unique black soil resources and natural environment of Jilin province provide the proper conditions for the growth of ginseng-the king of herb. Ginseng industry has effectively promoted the development of medical and health industry, and brought considerable economic income for ginseng farmers. However, long-term continuous cropping of ginseng causes the chemical, biological, and physical properties deterioration of soil, which influences the yield and the quanlity of ginseng, and results in the occurrence of replant obstacle. Identifying the malignant soil factors in continuous cropping obstacles, then analyzing the evolution process, and putting forward the improvement strategies is the primary task of ginseng research at present. This paper reviews the influence of ginseng cultivation on the physicochemical property, nutrient, enzyme activity, microecology and ecotoxicity of the soil, and the achievements of improving ginseng soil by chemical and biological techniques and methods in recent 10 years. [ABSTRACT FROM AUTHOR]

Copyright of Agricultural Outlook (1673-3908) is the property of Institute of Agricultural Information, Chinese Academy of Agricultural Sciences 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.)