经济植物篱在防治长江上游坡耕地水土流失中的作用及效果

Role and Effect of Cash Crop Hedgerows on Controlling Soil and Water Losses from Sloping Farmlands in the Upper Reaches of Yangtze River

地质破碎,生态脆弱,以坡地农业为主,水土流失严重,经济欠发达,贫困人口多,是长江上游地区的典型特征。很多专家认为,水土流失是贫困的重要原因,因为它冲走了植物赖以生存的肥沃土壤,流走了植物所需的水分和养分。利用经济植物篱技术和平衡施肥技术防止长江上游坡耕地的水土流失,证明是一项实用性强,应用广泛的技术。它可以有效地降低坡耕地的水土流失,增加作物的产量,显著地提高农民的收入,实现社会效益、生态环境效益和经济效益的统一,保证坡耕地农业可持续利用。

The upper reaches of Yangtze River are characteristic of broken geology ano fragile ecology, and prevail in sloping upland agriculture and serious soil erosion, leading to backward economy and large population in poverty. Experts consider that soil erosion is the origin of poverty, since it washes away the fertile top soil that crops grow on and along with moisture and plant nutrients that support all green lives. Adopting cash crop hedgerows and balanced fertilizer technology to combat soil erosion has proven very practical and applicable on a large scale. It not only reduces effectively the soil erosion from sloping farmlands, but also increases crop yield and farmers＇income. This integrated new technology has realized the goal combining social, ecological and economic benefits, and can thus safeguard the sustainable agriculture on sloping lands.