原状土壤磷容量与有效磷释放速率的关系

• 作 者: 范业宽 尹业平 李世俊
• 机 构: 华中农业大学资源环境与农业化学系
• 出 处: 华中农业大学学报
• 发表日期: 1998年01期
• 关键词: 土壤磷 土壤剖面 田间持水量 阴离子交换膜 释放速率 土壤铁 土壤养分 磷的释放 微区 吸磷

以磷为例，用ＥＤＴＡＮａ２预处理阴离子交换膜，连续测定２１ｄ，探讨了原状土壤剖面释磷速率与土壤速效磷，以及全磷、有机磷、铁磷、铝磷和钙磷等主要形态磷容量的关系。结果表明，在田间持水量下，土壤铁磷和铝磷容量都是释磷的源泉，尤其是铁磷和铝磷容量之和与释磷量呈极其显著的正相关。

Taking phosphorus as an example, anion exchange membrane was pretreated with EDTANa2 for 21 days. The release rate of phosphorus and soil available phosphorus, as well as the main forms of total phosphorus, organic phosphorus, iron phosphorus, aluminum phosphorus and calcium phosphate, were discussed. The relationship between phosphorus capacity. The results showed that under the field water holding capacity, the contents of Fe, P and Al-P in soils were the sources of phosphorus release, especially the sum of iron, phosphorus and aluminum-phosphorus capacities had a significantly positive correlation with the amount of phosphorus released.