期刊论文

Wang, H.(wanghuisb@126.com)

中文

农业工程学报

1002-6819

2008

24

6

85-88

10.3321/j.issn:1002-6819.2008.06.017

中国科学院***项目（2004109） 国家自然科学基金资助项目（90502006） 湖南农业大学人才基金资助（06YJ28））

本校为第一且通讯机构

为了研究聚丙烯酰胺(PAM)在黄土区集中暴雨条件对坡地水土及养分流失的影响,采用室内降雨模拟试验方法,探讨了在暴雨(2mm/min)条件下施加PAM对黄土坡地土壤养分流失及硝态氮淋溶特征的影响.试验结果表明,与对照处理相比较,施加PAM对径流硝态氮流失的影响不明显,但显著改变了径流磷和钾浓度随时间变化过程,分别降低了径流磷和钾的流失量为82%和84%;施加PAM减少了坡地土壤流失量93%,也降低了泥沙中硝态氮、速效磷和速效钾的流失量分别为 78%,95%和95%;施加PAM影响了坡地上壤水分再分布过程,减少了上壤水分深层的渗漏,从而降低了土壤硝态氮淋失的潜在风险.

In order to study the impact of applied polyacrylamide (PAM) on the transportation of soil, water and nutrients from the loess sloping land during the heavy storms in the loess section, the stimulated rainfall experiment in laboratory was designed to investigate the influence of PAM on characteristics of runoff nutrients concentrations, nutrients losses and redistribution of soil water and NO3--N in soil profile during the heavy rainstorm (rainfall intensity is 2 mm/min). The results show that, as compared with control experiments, PAM treatment has little effect on the NOVN loss process, howe...