摘要
通过对鄂南第四纪红色粘土发育的棕红壤的人工模拟降雨试验，建立了不同覆盖水平下地表径流和硼流失的数学模型。研究表明：土壤含水量与产流时间（降雨开始至产生地表径流的时间）呈显著负相关，径流的产生与入渗速度主要受叶面积的影响，土壤容重对径流与淋溶作用影响不大；没有覆盖的土壤径流和硼流失量明显高于有植被覆盖的土壤，当叶面积指数接近和大于１时，累计径流量和累积硼流失量将趋于稳定；增加植被覆盖度，合理密植是减少水溶态硼流失，保持水土的重要措施。
The maths model of boron loss and runoff was created under different cover degrees by simulated rainfall on brown red soil derived from quaternry period red clay. The results show that the time of producing runoff is negatively related to soil moisture, the quantities of runoff and infiltration velocity are effected principally by leaf area, and the effect of soil buld density on runoff and leaching is not obvious. The runoff and boron loss of soils without covering are more serious than those of woils with covering.When the index of leaf area is close to or larger than 1,the quantities of runoff and boron less tend to become steady.The principal measure of conserving water, soil and boron is improving cover degree.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1998年第1期50-54,共5页
Journal of Huazhong Agricultural University
基金
国家"九五"攻关课题
关键词
鄂南棕红壤
硼
叶面积指数
径流
水土流失
brown red soil of south Hubei Province, boron, leaf area index,runoff
