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Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board 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 Guihaia is the property of Guihaia 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.)

In order to find out the optimum harvest time of Polygala fallax, the study analyzed the root morphology, biomass, medicinal components, nutritional components and mineral elements of P. fallax roots during the 1-5 cultivating years by national standards and other methods. The results were as follows:(1)The morphology and biomass of P. fallax roots increased slowly during the first two cultivating years, and increased rapidly during the 2-3 cultivating years, however the parameters tended to be flat during the 3-5 cultivating years.(2)The contents of different medicinal ingredients varied significantly within the cultivating years, crude polysaccharides reached to the peak in the first year, total saponins reached to the peak in the second year, and total flavonoids reached to the peak in the fourth year.(3)The mineral elements showed various behavior among cultivating years, the contents of Ca, Mg, Mn and Cu accumulated to the maximum in the third year, the content of Fe decreased with increasing cultivating years, and the content of Pb increased with increasing cultivating years.(4)Crude protein content increased first and then decreased, and the same change trends were observed in the contents of total ash and crude fat, both of which decreased as cultivating years increasing.(5)P. fallax reached a high yield in the third cultivating year, and most of the quality indicators in the roots of 4-5 year at the lowest value, and the third year was the ideal harvest period for P. fallax, which provided technical guidance for high-yield and good quality of P. fallax. The results of the study elucidate the dynamics accumulation of P. fallax during different cultivating years and reveal the optimum harvest time of P. fallax. [ABSTRACT FROM AUTHOR]

Copyright of Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Arid Zone Research / Ganhanqu Yanjiu is the property of Arid Zone Research 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 Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Guihaia is the property of Guihaia 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 Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment Editorial Board 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Chemistry & Industry of Forest Products is the property of Chemistry & Industry of Forest Products Editorial Department 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 impact of structural deformations on soil properties controls its function as habitat. Soil compaction is widespread but tends to be most prevalent where heavy machinery is used in forestry and agriculture. Untimely traffic with heavy logging machinery often leads to irreversible damage of soil structure, restricting plant growth, reducing crop yield or decreasing the greenhouse gas emissions mitigation potential from the farmland. Avoiding soil compaction caused by agricultural management is a key aim of sustainable land management; however, limited understanding exists on how compaction affects the soil carbon process and microbial activities. Thus, we conducted a 120-day laboratory incubation to evaluate the effects of soil compaction mainly in agricultural soils on soil organisms and soil biological processes to identify relevant parameters which are helpful for assessing soil compaction from the soil biological and environmental point of view. We evaluated if threshold values of soil bulk density correspond to impacts on soil microbial fertility and environmental effect on soil. Our literature review showed that bulk density of Xinjiang farmland soil ranges from 0.85-1.60 g/cm³. In this study we used i) non-compacted reference 1.15 g/cm³ T1.15, ii) Treatment 1.30 g/cm³ (T1.30), where soil was the median value of bulk density, iii) T1.45, with was 75% of the value, iv) T1.60 was the maximum bulk density of the Xinjiang oasis farmland. In this study, we measured the soil carbon emission rate under different bulk density conditions using a Li-8100 automated soil CO2 flux system ( LI-COR, Lincoln，Nebraska，USA) from June to October 2016, and soil organic carbon (SOC), urease activity (URE), catalase activity (CAT), dissolved organic carbon (DOC), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) were also measured. The result showed that during the laboratory incubation time (0-120 d) treatment T1.15, T1.30, T1.45 and T1.60, MBC, MBN, URE and CAT decreased with the extension of the test period. Under different bulk density levels, soil MBC, MBN, URE and CAT increased rapidly and then decreased with the increase of soil bulk density, and was the highest when the bulk density was 1.45 g/cm³. Cumulative carbon emission from T1.15, T1.30, T1.45 and T1.60 treatments was 557.26, 653.48, 665.00 and 522.01 g/m², respectively. There was a trend of increasing first and then decreasing with increasing soil bulk density, and the highest was T1.45. The correlation analysis showed that soil carbon emissions were significantly correlated with urease and catalase activity (P<0.05), and very significantly correlated with soil organic carbon, dissolved organic carbon, and microbial biomass carbon and nitrogen (P<0.01). The effects of compaction on soil microbial activities and carbon emissions were weighed. Combined effects of trade-offs and compactions on soil biological activity and carbon emissions revealed that soil carbon emissions were the highest when the microbial activity is the highest, and therefore, the maximum microbial activities will also produce greater environmental effects. In summary, mechanical compaction directly affected microbial activities and carbon emissions by changing soil bulk density and pore structure. Therefore, when the soil capacity of oasis farmland was greater than or equal to or less than 1.45 g/cm³, proper overturning or repression should be carried out to make the soil biologically active at the best level. [ABSTRACT FROM AUTHOR]

Copyright of Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 impact of structural deformations on soil properties controls its function as habitat. Soil compaction is widespread but tends to be most prevalent where heavy machinery is used in forestry and agriculture. Untimely traffic with heavy logging machinery often leads to irreversible damage of soil structure, restricting plant growth, reducing crop yield or decreasing the greenhouse gas emissions mitigation potential from the farmland. Avoiding soil compaction caused by agricultural management is a key aim of sustainable land management; however, limited understanding exists on how compaction affects the soil carbon process and microbial activities. Thus, we conducted a 120-day laboratory incubation to evaluate the effects of soil compaction mainly in agricultural soils on soil organisms and soil biological processes to identify relevant parameters which are helpful for assessing soil compaction from the soil biological and environmental point of view. We evaluated if threshold values of soil bulk density correspond to impacts on soil microbial fertility and environmental effect on soil. Our literature review showed that bulk density of Xinjiang farmland soil ranges from 0.85-1.60 g/cm3. In this study we used i) non-compacted reference 1.15 g/cm3 T1.15, ii) Treatment 1.30 g/cm3 (T1.30), where soil was the median value of bulk density, iii) T1.45, with was 75% of the value, iv) T1.60 was the maximum bulk density of the Xinjiang oasis farmland. In this study, we measured the soil carbon emission rate under different bulk density conditions using a Li-8100 automated soil CO2 flux system ( LI-COR, Lincoln，Nebraska，USA) from June to October 2016, and soil organic carbon (SOC), urease activity (URE), catalase activity (CAT), dissolved organic carbon (DOC), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) were also measured. The result showed that during the laboratory incubation time (0-120 d) treatment T1.15, T1.30, T1.45 and T1.60, MBC, MBN, URE and CAT decreased with the extension of the test period. Under different bulk density levels, soil MBC, MBN, URE and CAT increased rapidly and then decreased with the increase of soil bulk density, and was the highest when the bulk density was 1.45 g/cm3. Cumulative carbon emission from T1.15, T1.30, T1.45 and T1.60 treatments was 557.26, 653.48, 665.00 and 522.01 g/m2, respectively. There was a trend of increasing first and then decreasing with increasing soil bulk density, and the highest was T1.45. The correlation analysis showed that soil carbon emissions were significantly correlated with urease and catalase activity (P<0.05), and very significantly correlated with soil organic carbon, dissolved organic carbon, and microbial biomass carbon and nitrogen (P<0.01). The effects of compaction on soil microbial activities and carbon emissions were weighed. Combined effects of trade-offs and compactions on soil biological activity and carbon emissions revealed that soil carbon emissions were the highest when the microbial activity is the highest, and therefore, the maximum microbial activities will also produce greater environmental effects. In summary, mechanical compaction directly affected microbial activities and carbon emissions by changing soil bulk density and pore structure. Therefore, when the soil capacity of oasis farmland was greater than or equal to or less than 1.45 g/cm3, proper overturning or repression should be carried out to make the soil biologically active at the best level. [ABSTRACT FROM AUTHOR]

The impact of structural deformations on soil properties controls its function as habitat. Soil compaction is widespread but tends to be most prevalent where heavy machinery is used in forestry and agriculture. Untimely traffic with heavy logging machinery often leads to irreversible damage of soil structure, restricting plant growth, reducing crop yield or decreasing the greenhouse gas emissions mitigation potential from the farmland. Avoiding soil compaction caused by agricultural management is a key aim of sustainable land management; however, limited understanding exists on how compaction affects the soil carbon process and microbial activities. Thus, we conducted a 120-day laboratory incubation to evaluate the effects of soil compaction mainly in agricultural soils on soil organisms and soil biological processes to identify relevant parameters which are helpful for assessing soil compaction from the soil biological and environmental point of view. We evaluated if threshold values of soil bulk density correspond to impacts on soil microbial fertility and environmental effect on soil. Our literature review showed that bulk density of Xinjiang farmland soil ranges from 0.85-1.60 g/cm3. In this study we used i) non-compacted reference 1.15 g/cm3 T1.15, ii) Treatment 1.30 g/cm3 (T1.30), where soil was the median value of bulk density, iii) T1.45, with was 75% of the value, iv) T1.60 was the maximum bulk density of the Xinjiang oasis farmland. In this study, we measured the soil carbon emission rate under different bulk density conditions using a Li-8100 automated soil CO2 flux system ( LI-COR, Lincoln，Nebraska，USA) from June to October 2016, and soil organic carbon (SOC), urease activity (URE), catalase activity (CAT), dissolved organic carbon (DOC), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) were also measured. The result showed that during the laboratory incubation time (0-120 d) treatment T1.15, T1.30, T1.45 and T1.60, MBC, MBN, URE and CAT decreased with the extension of the test period. Under different bulk density levels, soil MBC, MBN, URE and CAT increased rapidly and then decreased with the increase of soil bulk density, and was the highest when the bulk density was 1.45 g/cm3. Cumulative carbon emission from T1.15, T1.30, T1.45 and T1.60 treatments was 557.26, 653.48, 665.00 and 522.01 g/m2, respectively. There was a trend of increasing first and then decreasing with increasing soil bulk density, and the highest was T1.45. The correlation analysis showed that soil carbon emissions were significantly correlated with urease and catalase activity (P<0.05), and very significantly correlated with soil organic carbon, dissolved organic carbon, and microbial biomass carbon and nitrogen (P<0.01). The effects of compaction on soil microbial activities and carbon emissions were weighed. Combined effects of trade-offs and compactions on soil biological activity and carbon emissions revealed that soil carbon emissions were the highest when the microbial activity is the highest, and therefore, the maximum microbial activities will also produce greater environmental effects. In summary, mechanical compaction directly affected microbial activities and carbon emissions by changing soil bulk density and pore structure. Therefore, when the soil capacity of oasis farmland was greater than or equal to or less than 1.45 g/cm3, proper overturning or repression should be carried out to make the soil biologically active at the best level. [ABSTRACT FROM AUTHOR]

Copyright of Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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.)

Taking the mining areas, tailings and surrounding farmland soil of the Nulasai copper mine in Xinjiang as the research object, the characteristics of soil physical and characteristics of heavy metal contents in this area were studied, and their ecological and environmental risks were preliminarily evaluated. The results showed that due to the long-term impact of mining wastewater, soil pH in the Nulasai mining area was relatively low. Soil conductivity and salt content were higher than those in the surrounding farmland, while soil organic matter, available nitrogen, available potassium and available phosphorus were lower than those in the surrounding farmland. The contents of heavy metals Cr, Cd, Pb, Cu, Ni and Zn in the mining area, tailing area and farmland soil were all lower than those in Xinjiang except for Cu. Overall, the heavy metal content of the soil manifested the area > tailing area > farmland. Single factor(Pi), Nemerow comprehensive pollution index(I) and potential ecological risk index(RI) indicated that the ecological risk of heavy metals in the soil around the mining area was manifested tailings > mining area > farmland. The potential ecological risk index of heavy metals in 0~30 cm topsoil was higher than that in 30~70 cm deep soil, but the overall ecological risk was lower in different land use types. [ABSTRACT FROM AUTHOR]

Copyright of Guihaia is the property of Guihaia 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 Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment Editorial Board 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 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 Tianjin Medical Journal is the property of Tianjin Medical Journal 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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 Guihaia is the property of Guihaia 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.)