排灌机械工程学报2024，Vol.42Issue(8)：826-834,9.DOI:10.3969/j.issn.1674-8530.24.0034
黑土区坡耕地土壤侵蚀及水分利用效率对不同覆盖耕作模式的响应
Responses of soil erosion and water use efficiency of sloping farmland in black soil region to different mulch tillage modes
摘要
Abstract
To reveal the influence mechanism of different cover cropping modes on soil erosion control and water use efficiency of sloping cropland in the black soil zone,four cover cropping modes were set up,namely,no-till chopped straw uniform cover downhill(SM),no-till cover crop downhill(SC),no-till chopped pole uniform cover across the slope(CM),and conventional tillage(CK).The soil moisture dynamics of sloping arable land in the black soil zone,its water retention and soil fixation ca-pacity as well as its water use efficiency were researched and analyzed.The results show that no-till chopped straw uniform cover downhill(SM),no-till cover crop downhill(SC),and no-till chopped pole uniform cover across the slope(CM)have different degrees of effects on increasing soil moisture content,preventing soil erosion,and improving water utilization efficiency.The average soil water con-tent of 0-80 cm different soil layers increases by 9.34％-18.20％,5.30％-11.54％and 9.12％-19.84％in SM,SC and CM treatments,respectively,compared with that of CK treatment during the whole crop life.Runoff,erosion,rainfall,and maximum 30 min rainfall intensity altogether significantly negatively correlates with water use efficiency.SM,SC and CM treatments improve water use efficiency by 1.18％-10.76％compared to CK treatment.By setting up four different mulching till-age modes,revealing the changing law of soil moisture under different mulching tillage modes,clarif-ying the soil erosion characteristics of different mulching tillage modes,and analyzing the effects of dif-ferent mulching tillage modes on the water use efficiency,it is concluded that the no-till chopped pole uniform cover across the slope mode is the most effective in preventing soil erosion,storing and conser-ving moisture and improving water use efficiency.关键词
土壤侵蚀/水分利用效率/覆盖措施/耕作方式/坡耕地Key words
soil erosion/water use efficiency/cover measures/farming method/sloping farmland分类
农业科技引用本文复制引用
刘继龙,王志卓,曹晓强,董泽,刘倩倩,曹冉..黑土区坡耕地土壤侵蚀及水分利用效率对不同覆盖耕作模式的响应[J].排灌机械工程学报,2024,42(8):826-834,9.基金项目
国家重点研发计划项目(2021YFD1500802-2) （2021YFD1500802-2）
国家自然科学基金资助项目(52079030) （52079030）
