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应用生态学报 ›› 1999, Vol. 10 ›› Issue (4): 419-422.

• 研究论文 • 上一篇    下一篇

白浆土-植物系统营养物质转化机制及其有效性研究Ⅱ.白浆土无机磷形态变化

李法云, 高子勤   

  1. 中国科学院沈阳应用生态研究所, 沈阳 110015
  • 收稿日期:1998-09-03 修回日期:1999-04-29 出版日期:1999-07-25 发布日期:1999-07-25
  • 通讯作者: 李法云,男,29岁,讲师,1997于中国科学院沈阳应用生态研究所获博士学位,现为湖南农业大学博士后,主要从事土壤生态与污染生态化学方面的教学与科研工作,已发表论文15篇.
  • 基金资助:

    国家自然科学基金资助项目(49471043).

Transformation mechanism and availability of mutrients in albic soil plant system ⅡInorganic phosphorus transformation in albic soil

Li Fayun, Gao Ziqin   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1998-09-03 Revised:1999-04-29 Online:1999-07-25 Published:1999-07-25

摘要: 采用室内培养和微区试验研究表明,施入白浆土中无机磷在短时间内(24h、8d)主要向Fe-P和Al-P转变,较长时间后(80d),Al-P向Fe-P转化,Ca-P变化较弱,土壤中无机磷形态转化与白浆土本身的土壤属性具有密切关系。施用有机肥改变了土壤中无机磷形态的转化过程,其与土壤中的铁、铝氧化物反应形成的“Al-有机质-P”和“Fe-有机质-P”是作物较易利用的有效P源。

关键词: 白浆土, 无机磷形态, 转化

Abstract: Incubation test and microplot experiments were conducted to study the transformation of inorganic phosphorus in albic soil.The results show that most part of soil inorganic phosphate was transformed into iron and aluminum phosphates after a short period of incubation (24 hours and 8 davs,respectively),and aluminum phosphate was transformed into iron phosphate after 80 days of incubation.Calcium phosphate changed slightly throughout the whole period.Aclose relationship between inorganic phosphorus transformation and soil properties was found.The transformation process of inorganic phosphorus was changed by applying organic fertilizers,whose reaction with iron and aluminum oxides induced the formation of “organic matter iron phosphate” and “organic matter aluminum phosphate”complexes which can be easily uptaken by crop.

Key words: Albic soil, Inorganic phosphorus fractions, Transformation