摘要
通过不同坡度人工模拟冲刷试验 ,初步分析了黄土区土壤钾素径流流失规律。结果表明 :随径流流失的离子钾浓度随坡度的增大而增大 ;土壤钾的流失量与坡度呈指数函数关系 ;不同形态的钾在泥沙中有富集现象 ;钾主要是以不溶态的形式随泥沙迁移 。
With artificial simulative washing test on different slope, the soil potassium loss by erosion in loess area was preliminarily studied. Results showed that the concentration of ionic K increases with the increase of slope. The relationships between slope and amount of K loss can be expressed by the exponential functions. The different forms of potassium were enriched in sediment. K mainly migrated with sediment in unsolvable forms, while slowly available K chiefly removed with soil.
出处
《水土保持学报》
CSCD
北大核心
2002年第A01期47-49,共3页
Journal of Soil and Water Conservation
基金
国家重点基础研究发展规划资助项目 (G2 0 0 0 0 1860 5 )
国家杰出青年科学基金资助项目 (4 0 0 2 5 10 6)
关键词
全钾
缓效钾
速效钾
钾素流失
total K
slowly available K
rapidly available K
soil K loss by erosion
