土壤2016，Vol.48Issue(2)：259-264,6.DOI:10.13758/j.cnki.tr.2016.02.008
冻融条件下黑土无机磷分级及有效性研究
Classification and Efficiency of Inorganic Phosphorus in Black Soil Under Freezing and Thawing Conditions
摘要
Abstract
The freezing and thawing action is an important factor affecting the form and transformation of soil inorganic phosphorus, which is an essential element of ecosystem. In order to examine the changes of inorganic phosphorus fractions and their efficiency under freezing and thawing conditions, a black soil was selected, and the inorganic phosphorus fractions and their efficiency were measured with the method of Chang-Jackson under indoor simulation conditions. The results showed that the absolute contents of inorganic phosphorus fractions increased generally after freezing-thawing, while the relative content of inorganic phosphorus did not change significantly. The contents of inorganic phosphorus fractions followed the order: O-P> Fe-P>Al-P>Ca-P. Correlation analysis and path analysis indicated that Al-P and Fe-P were the available phosphorus source and affected the content of soil available phosphorus directly; while O-P, Ca-P and Al-P had larger coefficient of size chain, indicating that O-P and Ca-P indirectly affect the available phosphorus content through their interactions with Al-P. A good linear relationship was observed between Olsen-P(Y) and Al-P (X1) and Fe-P (X2).关键词
冻融循环/黑土/无机磷/分级/有效性Key words
Freezing-thawing cycles/Black soil/Inorganic phosphorus/Fractions/Efficiency分类
农业科技引用本文复制引用
乔思宇,周丽丽,范昊明,贾燕锋,武敏..冻融条件下黑土无机磷分级及有效性研究[J].土壤,2016,48(2):259-264,6.基金项目
国家自然科学基金项目(41101256、41471225)和辽宁省农业领域青年科技创新人才培养计划项目(2014054)资助。 （41101256、41471225）
