Soil and water loss is one of the major environmental problems in China. As a high molecular polymer, PAM possesses flocculation and hydration effects, and thus could improve soil water infiltration and reduce surface runoff. PAM has no toxic effects on soil, and it could preserve fertilizer, increase yields, harvest rainfall, and has a broad application prospect in agriculture production. According to the function of PAM on soil and water conservation, this paper mainly introduces the soil and water conservation mechanisms of PAM, the key factors in application processes, application prospects, and existing problems. PAM owns various types, the soil and water conservation efficacy varies primarily with PAM types, application methods, and application quantity. In order to make full use of it, PAM should be inosculated closely with the local soil, climate, landscape, and vegetation in soil erosion control. Future researches should emphasize on building a universal soil loss equation model after the PAM application as well as developing new PAM products, so as to provide a theory basis for promoting the application of PAM in soil and water conservation.%水土流失是我国主要环境问题之一.聚丙烯酰胺(PAM)作为一种高分子聚合物,具有絮凝作用和水合作用,可提高土壤水分入渗,减少地表径流.PAM对土壤无毒害作用,可保肥、增产、集雨,在农业生产中具有广泛的应用前景.针对PAM的水土保持功能,介绍PAM水土保持机制、施用过程中涉及的关键因素、应用前景及存在的问题.PAM的类型较多,水土保持效果随施用类型、施用方法、施用量变化而不同.PAM在水土流失治理过程中应与当地的土壤、气候、地貌、植被等密切结合,才能发挥其最大功能.今后研究中应注重PAM施用后土壤侵蚀通用模型的建立及新型PAM产品的开发,为PAM在水土保持中的推广提供理论依据.
展开▼
