Study on Relative Soil and Water Conservation Benefits of Ridge Tillage in Different Terrain Conditions in the Black Soil Area of Northeast China
Ridge til age, which is a very common and important til age measure in the black soil area of northeast China, has some soil and water conservation bene-fits, but has little attention. It is very important to explore the spatial distribution of the ridge direction of the arable land and its soil and water conservation benefits in different terrain conditions in the black soil area. So Binxian County of Heilongjiang Province was selected as the study area, and 168 field investigation units were ex-tracted by stratified sampling method and investigated. According to equations of slope gradient factor and slope gradient in ridge direction, and based on the soft-ware of Arcmap, SPSS and Excel, the investigation data of soil and water loss in Binxian County were analyzed and counted. The results show that in plain, hil y and mountainous areas, the average ground slope gradients are 1.92° , 6.20° and 8.27° respectively, and the average slope gradients along ridge direction are 1.33°, 4.52° and 6.45° respectively, which account for about 70%, 73% and 78% of the average ground slope gradients in the same terrain condition; the relative quantities of soil erosion in the present ridge til age condition account for about 55%, 69% and 67%respectively of that in down-slope ridge til age conditions, so the present ridge til age has obviously relative soil and water conservation benefits. Based on these results, the reasons of the present ridge til age status were analyzed, and some reform measures were proposed. The results could not only help to comprehend the spatial distribution and soil and water conservation benefits of ridge til age in the black soil area of Northeast China, but also provide scientific references for the layout of local soil and water conservation measures.
The black soil area in northeast ChinaRidge til ageRidge directionSoil erosionInvestigation of soil and water lossSoil and water conservation benefits
NETL
NSTL
万方数据
维普
