期刊文献+

不同雨强条件下红壤坡地养分流失特征研究 被引量:114

Study on Properties of Nutrient Loss from Red Soil in Sloping Land under Different Rainfall Intensities
下载PDF
导出
摘要 采用人工模拟降雨装置 ,对红壤坡地养分流失特征进行了试验研究 ,结果表明 :在雨强较大情况下 ,土壤养分以泥沙形式随径流迁移 ;当雨强较小时 ,随径流迁移的可溶态养分流失量占流失泥沙养分量的比例较高 ,土壤养分流失氮、磷、钾分别达到 5 3.12 % ,2 3.1% ,2 1.5 % ;不同形态的养分在流失泥沙中均有养分富集现象 ,但富集率各不相同 ;土壤养分流失量与雨强及泥沙流失量呈正相关关系。 A field study of soil nutrient loss was conducted in red soil on sloping surface by using rainfall simulator. The results showed that soil nutrients were transported mainly with sediment in runoff in high rainfall intensities. In low rainfall intensities, nutrients lost in soluble form had high percentage with runoff water. Nitrogen, phosphorus and potassium lost in soluble form account for 53.21%, 23.1%, 21.5% of the total nutrient lost in sediment respectively. Nutrient enrichment occurred in both sediment and soluble form, but the enrichment ratio was different. The amount of lost nutrients were correlated positively with rainfall intensities and lost sediment.
出处 《水土保持学报》 CSCD 北大核心 2002年第3期16-19,共4页 Journal of Soil and Water Conservation
基金 国家自然科学基金重点项目资助 (编号 :3 0 0 3 0 0 3 0 )
关键词 红壤坡地 养分流失特征 人工模拟降雨 雨强条件 红壤 simulated rainfall rainfall intensity red soil nutrient loss
  • 相关文献

参考文献14

二级参考文献59

共引文献2276

同被引文献1414

引证文献114

二级引证文献1301

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部