摘要
通过对侵蚀与非侵蚀黑土的渗透性能研究,结果表明,非侵蚀土壤的渗透速率大于侵蚀土壤,且达到稳渗的时间长于侵蚀土壤;侵蚀土壤与非侵蚀土壤的渗透速率呈现随土层深度的增加而减少的趋势;侵蚀土壤达到稳定的时间随土层深度的增加而延长,而非侵蚀土壤则随土层深度的增加而缩短。侵蚀与非侵蚀土壤的渗透速率均随着初始含水量的增加而下降;同一含水量下,非侵蚀土壤的渗透速率大于侵蚀土壤,且达到稳渗的时间长于侵蚀土壤;非侵蚀地与侵蚀地降雨前土壤的初渗速率和稳渗速率均大于降雨后土壤的初渗速率和稳渗速率,且降雨前后非侵蚀地渗透速率都大于侵蚀地的渗透速率;通过典型相关分析可知,土壤容重、总孔隙度和非毛管孔隙度是影响土壤渗透能力的主要指标。
According to eroded and non-eroded soil infiltration properties were studied.The results showed that：non-eroded soil infiltration rate was higher than the eroded soil,and the steady time of non-eroded soil was longer than the eroded soil;non-eroded and eroded soil infiltration rate was decrease with increasing the soil depth;in the time of reach steady eroded soil was increased with increasing soil depth,but non-eroded soil was decreased with increasing soil depth.Non-eroded and eroded soil infiltration rate was declined with increasing the initial water content;in the same water content,the rate of non-eroded soil infiltration rate was higher than the eroded soil,and the time of achieve steady infiltration was longer than the eroded soil;non-eroded and eroded soil infiltration rate before rainfall was greater than soil infiltration rate after rainfall and non-eroded soil infiltration rate was greater than eroded soil infiltration rate.According to classic correlation analysis,we can see that soil permeability was affected by the soil bulk density,total porosity and non-capillary porosity.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期83-86,共4页
Journal of Soil and Water Conservation
基金
国家重点基础研究发展计划(973)(2004CB418507)
关键词
水土流失
土壤渗透性
土壤理化性质
含水量
降雨
soil erosion
soil permeability
soil physical and chemical properties
water content
rainfall
