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中国农学通报

中国农学通报 ›› 2006, Vol. 22 ›› Issue (6): 249-249.

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水田土壤剖面磷素吸附-解吸特征

王道涵,陈 新,梁成华   

  • 出版日期:2006-06-05 发布日期:2006-06-05

The Character about Absorbing and Desorption of Phosphorus in Profile of Paddy Soil

Wang Daohan, Chen Xin, Liang Chenghua   

  • Online:2006-06-05 Published:2006-06-05

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摘要： 磷素在土壤剖面中的移动与地下水体环境关系密切，但目前对于磷素在土壤中垂直迁移的机理问题还不清楚，研究从土壤剖面对磷素吸附-解吸的角度对该问题进行了初步的探讨。以水田土壤剖面为研究对象，对剖面不同层次土壤对磷素的吸附-解吸特征进行研究，结果表明：供试土壤剖面不同层次土壤对磷素吸附均可以与简单的Langmuir方程相拟合，表现出相似的吸附机制；吸附态磷均有随深度增加解吸率上升的特点，这种情况可能有利于磷素在土壤剖面中垂直向下移动。

关键词: 禾本科牧草, 禾本科牧草, 鲜草草产量, 干草草产量, 粗蛋白质, 刈割

Abstract: The migration behavior of phosphorus（P） in the soil profile is in close relation with environmental question of the underground water body. The question, whether P taking place vertical transportation in the soil, remains not clear. In order to probe into P vertical migration behavior and function mechanism in the soil profile deeply, paddy soil of Shenyang area was selected and studied. The results are as follows: different levels soil absorbs to P can be described with Langmuir equation and the rate of desorption of P was increased with depth of soil levels, which maybe help P to move vertically.