聚丙烯酰胺防治坡地水土流失田间试验研究

Field Experiment of Preventing Water and Soil Losses with

坡地施用聚丙烯酰胺可以减少地表径流 ,提高土壤含水量 ,促进土壤沉降 ,增强土壤结构性和水稳性 ,因而提高了土壤的持水性和抗蚀性 ,减少了土壤侵蚀量和肥力流失量 ,有利于作物增产。施用聚丙烯酰胺可使产量增加 18.7%～ 32 .4 %。施用聚丙烯酰胺对环境无不良影响 ,而且投入费用较低 。

Because the polyacrylamide can reduce runoff, increase soil moisture, accelerate soil sedimentation, improve soil structure, raise soil water stability, polyacrylamide applied to sloping field increases soil water holding power and erosion resistance, reduces soil erosion and fertility losses,it is benefit to crop yield. Applying Polyacrylamide can increase crop yield by 18.7%～32.4%. Polyacrylamide has not harmful effect on environment. In addition, its input expenditure is low. This new approach of preventing soil and water losses is deserved exploring deeply.