陕北不同土地利用类型下土壤无机磷形态分布及有效性研究  

Inorganic phosphorus fractionation and availablility on different kinds of planting conditions of soil in Northern Shaanxi

作　　者：张倩[1] 张素霞[2] 刘克[2] 吕家珑[2] 

机构地区：[1]甘肃农业职业技术学院,甘肃兰州730020 [2]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2011年第4期133-136,共4页Agricultural Research in the Arid Areas

基　　金："973"项目(2005CB121102);黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-138)

摘　　要：采用蒋柏藩-顾益初无机磷分级方法,对黄土高原两种农田土壤剖面（0-100 cm）中无机磷形态分布特征进行了研究。结果表明：两种农田土壤剖面（0-100 cm）中无机磷形态占全磷的90.95%;无机磷又以Ca-P为主,所占比例在87.86%-92.55%之间;糜子地土壤剖面中无机磷总量、Ca2-P、Ca8-P、Al-P和Fe-P含量高于马铃薯地土壤,O-P和Ca10-P含量低于马铃薯地土壤;各无机磷形态含量顺序为Ca10-P〉O-P〉Ca8-P〉Fe-P〉Al-P〉Ca2-P。相关分析和通径分析表明,黄土高原两种农田土壤中Ca2-P是速效磷的主体。By using the Jiang-Gu inorganic phosphorus fractionation method,a study was conducted on the forms and compositions of inorganic phosphorus in 0-100 cm layers of calcareous soil profile on sloping land of two kinds of farmland soil on the Loess Plateau.The results showed that inorganic P was 90.95% of total P.Ca-P was in a dominate position in inorganic P,its proportion was 87.86%-92.55%.The contents of inorganic P,Ca2-P,Ca8-P,Al-P and Fe-P in soils of Panicum miliaceum L were higher than that in soils of Solanum tuberosum L.The contents of O-P and Ca10-P were opposite results.The order of contents of inorganic P were Ca10-PO-PCa8-PFe-PAl-PCa2-P.It was showed by correlation analysis and path analysis that Ca2-P was the main resource of rapid available phosphorus in the soils.

关 键 词：黄土高原 无机磷形态 糜子 马铃薯 

分 类 号：S153.61[农业科学—土壤学]