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| Mechanism of PAM on soil and water conservation and its development |
| Li Jingjing1, Bai Gangshuan1,2 |
| 1.Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources; 2. Institute of Soil and Water Conservation, Northwest A&F University: 712100, Yangling, Shaanxi, China |
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Abstract 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.
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Received: 16 May 2011
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