摘要
[目的]为有效的防治黄土高原坡耕地水土流失，提高坡耕地持续利用。[方法]在陇中半干旱区6°～7°的坡耕地上，设传统耕作下春小麦与苜蓿间作（TWL）、马铃薯与苜蓿间作（TPL）、鹰嘴豆与苜蓿间作（TCL）、免耕秸秆覆盖下春小麦与苜蓿间作（NTSWL）、马铃薯与苜蓿间作（NISPL）、鹰嘴豆与苜蓿间作（NTSCL）6个处理，进行保护性耕作的定位研究，并分别探讨保护性耕作对每种间作方式的土壤容重、饱和导水率以及水土流失的影响。[结果]结果表明，与传统耕作（T）相比，免耕秸秆覆盖（NTS）增大了土壤的容重，提高了表土的饱和导水率，使土壤的稳定性有所提高，水分易于入渗。免耕秸秆覆盖（NTS）可明显减少土壤侵蚀量和径流量。[结论]保护性耕作是控制黄土高原半干旱区坡耕地水土流失的有效措施。
[ Objective]The effective measure of the reduction of soil and water losses in sloping field of the Loess Plateau was experimented for the sustaining utilization of the cultivated land. [ Method] The positioning research on the conservation tillage was conducted through the establishment of 6 intercropping treatments under traditional fanning model were： spring wheat and alfalfa （ TWL ）, potato and alfalfa （ ZpL ）, chickpeas and alfalfa （TCL）, spring wheat under no-tillage and plastic covering and alfalfa （NTSwL）, potato and alfalfa（NTSpL） and chickpeas and alfalfa（NTScL） in the sloping land with 6° - 7° of semi-arid area and the effect of different conservation tillage on bulk density, saturated hydraulic conductivity and water/soil loss was explored respectively. [Results] The results showed that compared with the traditional fanning（T）, the soil bulk density of NTS was increased, which improved the soil＇s saturated hydraulic conductivity, strengthened the soil stability with easy percolation of the water into soil. And also, the treatment-NTS could significantly reduce the soil erosion and runoff. [ Conclusion] The conservation tillage was the effectively controlling measures of the water/soil loss of the sloping land in the semi-arid area of Loess Plateau.
出处
《安徽农业科学》
CAS
北大核心
2009年第13期6087-6088,6111,共3页
Journal of Anhui Agricultural Sciences
基金
中澳合作项目ACIAR(LWR2/1999/094)
国家科技支撑计划(2006BAD15B06)
关键词
保护性耕作
坡耕地
水土流失
侵蚀
径流
Conservation tillage
Sloping land
Water/soil loss
Erosion
Runoff
