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[1]LUO Fuyan,ZHANG Zehong,GE Qiuling,et al.Effects of Crop Types on Tillage Erosion in the Dry Valleys of Jinsha River Basin[J].Research of Soil and Water Conservation,2023,30(02):22-28.[doi:10.13869/j.cnki.rswc.2023.02.028]

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Effects of Crop Types on Tillage Erosion in the Dry Valleys of Jinsha River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 22-28 Column: Public date: 2023-03-10

Title:: Effects of Crop Types on Tillage Erosion in the Dry Valleys of Jinsha River Basin

Author(s):: LUO Fuyan¹, ZHANG Zehong^2,3, GE Qiuling², QIN Huchao², LIU Hui^2,3; (1.College of Environmental Science and Engineering, China West Normal University, Nanchong, Sichuan 637009, China; 2.School of Land and Resources, China West Normal University, Nanchong, Sichuan 637009, China; 3.Sichuan Provincial Engineering Laboratory of Monitoring and Control for Soil Erosion in Dry Valleys, Nanchong, Sichuan 637009, China)

Keywords:: crop types; tillage erosion; magnetic tracer; dry valleys

CLC:: S157.4

DOI:: 10.13869/j.cnki.rswc.2023.02.028

Abstract:: To study the effect of crop types on tillage erosion in dry valleys, tillage experiments on slope farmland with different crop types(bare field, corn field and buckwheat field)were implemented to measure the tillage displacement distance and tillage erosion rate with the magnetic tracer in the dry valley regions of Sichuan. The results showed that: the soil displacement distance of three farmlands decreased in the order: bare field>buckwheat field>corn field; soil translocation of corn field and buckwheat field was significantly less than that of bare field(p<0.05), and that of buckwheat land was slightly greater than that of corn land, which showed that crop factors could reduce the soil tillage displacement in sloping land; there was a significant positive correlation between tillage displacement and slope for the three land types, and tillage displacement coefficient k₂ and tillage transport coefficient k₄ for corn field and buckwheat field were significantly smaller than that of bare field, which indicated that crop factors reduced the increasing amplitude of tillage displacement with slope; tillage erosion rate of bare field was significantly greater than those of corn field and buckwheat within the range of measured slope field(p<0.01); Compared with corn field and buckwheat field, the mean tillage erosion rate for bare field increased by 1.99 times and 1.88 times, respectively, with no significant difference between corn field and buckwheat field(p>0.05). The above results indicate that the crop system reduced obviously tillage erosion for sloping farmland and weakened the influences of slope gradient on tillage erosion. The crop system is beneficial to the control of tillage erosion for slope farmland. The research results can enrich the understanding of anti-erosion characteristics of crop roots in sloping farmland and lay an important foundation for improving the tillage erosion model.

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Last Update: 2023-03-10