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[1]XIA Zitai,CHENG Weiwei,LI Yongmei,et al.Effects of Crop Rotation and Fallow Patterns on Soil Aggregates and Organic Carbon Content[J].Research of Soil and Water Conservation,2022,29(03):31-37.

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Effects of Crop Rotation and Fallow Patterns on Soil Aggregates and Organic Carbon Content

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 31-37 Column: Public date: 2022-04-20

Title:: Effects of Crop Rotation and Fallow Patterns on Soil Aggregates and Organic Carbon Content

Author(s):: XIA Zitai, CHENG Weiwei, LI Yongmei, ZHAO Jixia, FAN Maopan; (College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China)

Keywords:: crop rotation; fallow; soil aggregate; organic carbon

CLC:: S157.4

DOI:: -

Abstract:: In order to explore the effect of crop rotation and fallow patterns on the aggregate stability and organic carbon content of red soil sloping farmland, we set up four treatments of fallow land, maize monocropping, maize-pea-maize and maize-vetch-maize through field experiments. The soil aggregate stability and organic carbon content under different planting patterns were analyzed. The results show that:(1)the soil mechanical stability and water stability under different planting patterns have the highest proportion of soil aggregates with a size of ≥0.25 mm; mechanical stability aggregates account for more than 80.68%, water-stable aggregates reach to more than 77.05%, and the proportion of ≥0.25 mm aggregates decrease in the order: fallow land>maize-peas-maize>maize-vetch-maize>maize monocropping;(2)according to different aggregate stability indexes(MWD, GMD, R_0.25 and PAD), the aggregate stability of fallow land is the best, which is significantly different from maize monocropping, in addition, the stability of aggregate in both fallow land and maize rotation is better than that in the maize monocropping;(3)soil aggregates in maize monocropping have the lowest organic carbon content; maize rotation and fallow land can significantly increase organic carbon content, and the effect of maize-vetch-maize rotation is the best; aggregates with size range of ≥0.25 mm can store the highest carbon content;(4)the analysis of the correlation between the soil water-stable aggregate stability index and the organic carbon content shows that the four different aggregate stability indexes have a positive significant correlation with the organic carbon content, and have the highest correlation with R_0.25. These results of this study can provide a theoretical basis for the prevention and control of soil erosion on sloping farmland in the test area.

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Last Update: 2022-04-20