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在两种不同土壤条件下 (残茬覆盖的固结土壤和前期耕过的疏松土壤 )利用凿形犁进行顺坡 (沿坡向下 )和逆坡 (沿坡向上 )耕作 ,研究不同耕深 (H)、耕速 (v)对土壤输移量 (Q)和土壤侵蚀量的影响。结果表明 :土壤移动的平均距离是坡度、土壤结构、耕深和耕速的函数 ,以这些因子为自变量建立的模型可预测土壤移动距离的变化 ,同时土壤移动距离还与耕具的几何形状有关 ,但此模型未考虑这个因素。利用这个模型绘制在固定耕作方式下的侵蚀诺模图 ,可用来评价耕深、耕速对侵蚀量的影响 ,并可评价防治侵蚀的可行性方案。
Under two different soil conditions (consolidated soil covered by stubble and earlier-tillage loose soil), chisel plows were used to conduct downhill (downslope) and downslope (upside) tillage to study the effects of different tillage depths (H) and tillage (V) on soil transport (Q) and soil erosion. The results show that the mean distance of soil movement is a function of slope, soil structure, tillage and tillage. The model established by these factors can predict the change of soil moving distance, and the soil moving distance is also related to the geometry of tilling tool However, this model did not consider this factor. Using this model to draw the erosion nomogram in the fixed tillage mode, it can be used to evaluate the effects of tillage and tillage on the erosion amount, and to evaluate the feasibility of erosion control.