张倩,张素霞,刘克,吕家珑.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[J].干旱地区农业研究,2011,29(4):133~136
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
  
DOI：10.7606/j.issn.1000-7601.2011.04.24
中文关键词:  黄土高原  无机磷形态  糜子  马铃薯
英文关键词:Loess Plateau  inorganic phosphorus fractionation  Panicum miliaceum L.  Solanum tuberosum L.
基金项目:“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）
作者单位
张倩 甘肃农业职业技术学院， 甘肃 兰州 730020 
张素霞 西北农林科技大学资源环境学院， 陕西 杨凌 712100 
刘克 西北农林科技大学资源环境学院， 陕西 杨凌 712100 
吕家珑 西北农林科技大学资源环境学院， 陕西 杨凌 712100 
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中文摘要:
      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。
英文摘要:
      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 content s of O-P and Ca10-P were opposite results. The order of contents of inorganic P were Ca10-P＞O-P＞Ca8-P＞Fe-P＞Al-P＞Ca2-P. It was showed by correlation analysis and path analysis that Ca2-P was the main resource of rapid available phosphorus in the soils.
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