酸性土壤固磷机理研究进展  

Recent advances in phosphorus fixation mechanism in acid soil

作　　者：张俊平[1] 朱峰[1] 张新明[1] 王长委[1] 廖宗文[1] 

机构地区：[1]华南农业大学资源与环境学院,广州510642

出　　处：《中国生态农业学报》2008年第1期229-233,共5页Chinese Journal of Eco-Agriculture

基　　金：深圳市农业综合开发基金项目(2003-96)资助

摘　　要：随着酸性土壤固磷机理研究的不断深入,已经有一些研究开始重视土壤中Mn对P的固定作用。本文以Mn-P的提出为出发点,论述了近10年来对酸性土壤固磷机理研究的新进展,突破了常规P素形态分级研究中分为Fe-P,Al-P,O-P和Ca-P等无机磷测定的经典分级,认为玄武岩母质砖红壤中的Mn-P是P素固定的主要形式之一,进而比较了Fe、Al、Mn对P固定作用,并从P的化学有效性与生物有效性差异等方面进行了比较全面的论述,提出了减少P素固定提高磷肥利用率的措施及今后的重点研究方向。With deepening studies on phosphorus-fixation mechanism in acid soils,some researchers have begun to focus on phosphorus-fixation by Mn. On the presentation of Mn-P fixation,this paper reviews the latest advances in recent 10 years and concentrates on the mechanism of phosphorus fixation in acid soils. In addition, it brakes through the classical inorganic P fractionation into Fe-P, Al-P, O-P and Ca-P in the traditional P classification and considers Mn-P as one of the main phosphorus fixation modes in latosols,cultivated from the parent basalt material. Furthermore,fixation of P by Fe, Al, Mn is compared, and differentiation from chemical availability and bioavailability of P discussed. Based on the above ,this paper presents some alienable measures for enhancing P utilization efficiency and postulates pivotal future research directions in the field of P fixation.

关 键 词：酸性土壤 锰(Mn) 铁(Fe) 铝(Al) 固磷机理 

分 类 号：S153.4[农业科学—土壤学] X517[农业科学—农业基础科学]