论文部分内容阅读
通过对云南红壤坡耕地一年内产流降雨的监测,研究不同农作处理下烤烟坡耕地的水土流失特征。结果表明:1)顺坡垄作处理条件下,施肥量的差异造成地表植被覆盖率的差异,影响了水土流失量和养分流失量;2)破膜提土处理条件下,相比未破膜处理,破膜后可增加地表土壤的保水能力、减少水土流失量,其中秸秆覆盖在揭膜后对减轻水土流失效果更好;3)烤烟生长前期,农作处理方式是影响水土流失和养分流失的主要因素,烤烟生长后期,地表植被覆盖率成为影响坡耕地水土流失和养分流失的主要因素;4)氮、磷养分流失途径相比较,总磷流失相对于总氮流失受径流流失影响更大。
Through monitoring rainfall and runoff of red soil in Yunnan red soil within one year, the characteristics of soil and water loss on flue-cured tobacco sloping lands under different farming practices were studied. The results showed that: 1) Under the conditions of slope irrigation, the difference of fertilization caused the difference of surface vegetation coverage, which affected the amount of soil erosion and nutrient loss; 2) , After the rupture membrane can increase the surface water retention capacity of soil to reduce the amount of soil erosion, of which straw mulching after removing the film to reduce soil erosion better; 3) flue-cured tobacco early growth, farming is affected soil erosion and nutrient loss The main factors that affect the soil erosion and nutrient loss are the main factors that affect the soil erosion and nutrient loss in sloping farmland. 4) Compared with the path of nitrogen and phosphorus loss, the total phosphorus loss is more affected by the runoff loss than the total nitrogen loss.