一个时期以来,人们经常应用强度因素和容量因素的概念来研究土壤磷素的有效性。但是这些因素和作物养分吸收之间的关系,尚缺乏一个动力学的概念。土壤溶液中磷素养分浓度的变化,既受控于土壤固相磷素的释放速率,又受控于根系吸收情况。显然,这是一个动态平衡。因而,通过土壤溶液中磷素养分释 Since a long period of time, people often use the concept of strength factor and capacity factor to study the effectiveness of soil phosphorus. However, the relationship between these factors and crop nutrient uptake still lacks a kinetic concept. The change of phosphorus nutrient concentration in soil solution is not only controlled by the release rate of solid-phase phosphorus in soil, but also controlled by the root absorption. Obviously, this is a dynamic balance. Thus, release of phosphorus through soil solution is explained