【摘要】 采用江苏沿海地区的粉质砂壤土,对不同用量聚丙烯酰胺(PAM)防治土壤侵蚀的效果进行室内试验,以探讨通过施加PAM抑制土壤侵蚀的最佳比例。试验结果表明:PAM浓度在0~10‰范围内时,土壤产流时间随着PAM浓度的升高而提前,浓度大于10‰后,土壤产流时间又有所推迟;试验土壤经PAM处理后入渗率降低,这与部分研究结论有所不同;PAM在0~5‰浓度范围内时,对抑制土壤侵蚀作用明显,当浓度大于5‰后,抑制作用不再增加。更多还原

【Abstract】 The paper used the silty sandy loam of Jiangsu coastal area to conduct indoor tests of the effect of soil erosion prevention and control by using different amounts of PAM for finding out the best proportion to prevent soil erosion.The outcomes show that a)when the PAM concentration is within 0-10‰,the runoff-producing time of soil becomes shorter along with the increase of PAM concentration and the time of runoff-producing becomes longer when PAM concentration is greater than 10‰;b) the infiltration rate of tested soil decreases after PAM treatment which is different from some research conclusions and;c) when the PAM concentration is within 0-5‰,the function of soil erosion control is remarkable and when PAM concentration is greater than 5‰,the controlling function does not increase any more.更多还原