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中国农学通报

中国农学通报 ›› 2008, Vol. 24 ›› Issue (7): 245-248.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

不同磷水平对山东褐土耕层无机磷形态及磷有效性的影响

张英鹏,陈 清,李 彦,李国生,孙 明,刘兆辉   

  • 收稿日期:2008-05-26 修回日期:2008-06-02 出版日期:2008-07-05 发布日期:2008-07-05

Effect of Phosphorus Levels on Form and Bioavailability of Inorganic P in Plough Layer of Cinnamon Soil in Shandong Province

Zhang Yingpeng, Chen Qing, Li Yan, Li Guosheng, Sun Ming, Liu Zhaohui   

  • Received:2008-05-26 Revised:2008-06-02 Online:2008-07-05 Published:2008-07-05

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摘要： 为了在褐土土壤上合理施用磷肥及提高磷的植物有效性，笔者采用室内土柱模拟试验，研究了不同施磷量对褐土耕层中不同磷组分的含量及磷素有效性的影响。结果表明，褐土耕层的速效磷含量与施磷量成极显著正相关，土壤磷素的活化系数也随施磷量的增加而显著提高；在褐土无机磷组分中对速效磷的贡献最大的是Ca2-P，其次是Fe-P，再次是Ca8-P。随着施磷量的增加，而作为作物迟效磷源的Ca10-P含量没有明显变化，说明在相当长的时间内是不可能被作物吸收利用的。石灰性磷仍是褐土耕层无机磷的主要形态，无机磷的各组分所占比例的高低依次是Ca10-P、O-P、Ca8-P、Al-P、Fe-P，所占比例最低的是Ca2-P。

Abstract: In order to apply P fertilizers properly and enhance the bioavailability of phosphorus, simulation experiment of soil column was used to study the effects of P rates on the contents of inorganic P forms and P availability of plough layers in cinnamon soil. Results showed that there was a markedly positive correlation between Olsen-P and P rates of plough layers in cinnamon soil. Phosphorus activation coefficient of soil was enhanced markedly with the increase of P rates. The highest contribution is Ca2-P among the inorganic P constituents, and then was Fe-P and the lowest was Ca8-P. As P rates were increased, Ca10-P content had no obvious variation, which was thought as a slack effective P source and would not be absorbed by crops in the future of some length. Calcareous P were the main forms of inorganic P in plough layers of cinnamon soil and the proportions of the constituents of inorganic P from high to low were shown as followed: Ca10-P, O-P, Ca8-P, Al-P, Fe-P, and the lowest was Ca2-P.

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