论文部分内容阅读
结果表明 ,与大豆单作相比 ,黄花菜和百喜草植物篱笆径流量、侵蚀量分别减少了 4 .6 7% ,37.82 % ,植物篱笆处理和大豆单作处理的径流量、侵蚀量与开始形成径流所经历的时间之间呈显著负相关 ,而径流量与侵蚀量之间为显著正相关关系 ,建立了相应的降雨产流、降雨产沙、径流侵蚀回归模型。植物篱笆的水土保持机理表现在 :植物篱笆地上部的缓流和分流作用 ,有效地减弱径流的携沙能力 ,减少了细沟侵蚀 ;地上部分可阻挡土壤大颗粒和过滤土壤小颗粒 ;植物篱笆地下部根系显著改善了耕层土壤的物理性状 ,显著提高了土壤的抗冲性 ;土壤性状显著增强了土壤的入渗能力 ,植物篱笆带在较长的时间内维持较高的土壤入渗量和较大的稳定入渗速率
The results showed that the runoff and erosion of lily and hippophae flowering plants decreased by 4.667% and 37.82%, respectively, compared with that of soybean single cropping. The runoff and erosion amount of the plant fence and soybean single crop were There was a significant negative correlation between the time elapsed from the start of runoff and the positive correlation between runoff and erosion, and the regression models of runoff, rainfall, sediment yield and runoff erosion were established. The soil and water conservation mechanisms of plant fences are as follows: the gentle flow and diversion of the upper part of the plant fence can effectively reduce the carrying capacity of runoff and reduce the erosion of the rill; the upper part can block the large particles of soil and filter the small particles of soil; Roots of the subsurface significantly improved the physical properties of the topsoil and significantly improved the soil anti-scourability. The soil properties significantly enhanced the infiltration capacity of the soil. The plant fences maintained high soil infiltration over a longer period of time And a larger steady infiltration rate