中文摘要：

在我国西北地区,风蚀是造成土地退化的主要影响因素之一.聚丙烯酰胺（PAM）是一种高效的土壤结构改良剂.因其具有特殊的物理化学性质,可以与土壤作用而改善土壤表层结构,近年来一直受到人们的广泛关注.本文介绍了PAM的物理化学性质,详细论述了PAM对土壤风蚀量、起动风速的影响,及PAM在风蚀防治中的不同使用量、使用方法和效果,及其与其他材料的对比,并通过PAM对土壤物理性质的改善进一步分析PAM防治风蚀的机理.综合分析得出,虽然PAM在风蚀防治中存在一些问题,但作为一种固沙剂,它不仅能提高土壤抗风蚀的能力,而且也能改善土壤的物理性状,可为植物生长创造良好的水土条件;提出若在风蚀治理和改良城市环境中将PAM与植物种植相结合,将能大大提高植物的成活率、改善风蚀区的风蚀状况和生态环境工程建设的质量.因此,PAM在防治风蚀方面具有重要的现实意义和广阔的应用前景.

英文摘要：

Soil wind erosion is one of the main reasons for soil degradation in the northwest region of China. Polyacrylamide（ PAM）,as an efficient soil amendment,has gained extensive attention in recent years since it is effective in improving the structure of surface soil due to its special physical and chemical properties. This paper introduced the physical and chemical properties of PAM,reviewed the effects of PAM on soil wind erosion amount and threshold wind velocity,as well as the effect differences of PAM in soil wind erosion control under conditions of various methods and doses.Its effect was proved by comparing with other materials in detail. Furthermore,we analyzed the mecha-nism of wind erosion control with PAM according to its influence on soil physical characteristics. Comprehensive analysis showed that,although some problems existed in wind erosion control with（ PAM）,PAM as a sand fixation agent,can not only enhance the capacity of the soil resistance to wind erosion,but also improve soil physical properties to form better soil conditions. Besides,we proposed that combination of PAM and plant growth would increase the survival rate of plants greatly,control soil wind erosion in wind-erosive areas,and improve the quality of the ecological environment construction. Thus,PAM has practically important significance and wide application prospect in controlling soil wind erosion.