摘要
土壤侵蚀和雨水的流失是干旱、半干旱地区制约农业发展乃至生态环境良性循环的两个主要因素。聚丙烯酰胺 (PAM ,Polyacrylamide)对土壤的性质有着明显的改进作用 ,PAM具有良好的黏结力 ,能有效改良土壤的表层结构 ,提高土壤的稳定性 ,增加土壤的入渗率 ,减少土壤侵蚀。本文试图通过人工降雨模拟实验 ,获得不同的PAM的使用量及覆盖率与土壤侵蚀量在不同的雨强、不同的坡度条件下的关系。实验表明 ,经PAM处理后土壤的入渗性能和抗侵蚀的性能都有所提高 ,PAM能明显地黏结着土壤表面的颗粒 ,形成大的团聚体 ,阻碍土壤结皮的形成 ,减少土壤侵蚀。
Soil erosion and water loss are two serious problems threatening the ecosystem and preventing the development of agriculture in the semiarid and arid regions. Polyacrylamide(PAM) can significantly amend the properties of soil. PAM, with high vicosity, can effectively improve the surface structure of soil, enhance the stability of soil, increase water infiltration and reduce soil erosion. The objective of this paper, with experiments conducted with rainfall simulator, was to determine the relations between soil erosion and applications of PAM under conditions of different rainfall intensities and slopes. Experiments showed that the soils treated with PAM had better infiltration and stability properties. With cohering significantly with particles of soil at surface, forming bigger aggregates and halting the formation of crust, PAM can provide erosion control and benefit infiltration.
出处
《土壤学报》
CAS
CSCD
北大核心
2003年第3期401-406,共6页
Acta Pedologica Sinica
基金
科技部山丘区雨水储蓄农业高效利用产业化示范工程
中国科学院"引进国外杰出人才"基金项目资助
