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生态学杂志 ›› 2002, Vol. ›› Issue (5): 22-25.

• 研究报告 • 上一篇    下一篇

杉林土壤中磷的固定作用及其抑制因素

陈金林1, 潘根兴2   

  1. 1. 南京林业大学森林资源与环境学院, 南京, 210037;
    2. 南京农业大学, 南京, 210095
  • 收稿日期:2002-03-18 修回日期:2002-07-02 出版日期:2002-10-10
  • 基金资助:
    国家自然科学基金项目(39970605)资助.

Phosphate Immobilization and Its Inhibitting Factors in the Soil under a Chinese Fir Stand

Chen Jinlin1, Pan Genxing2   

  1. 1. College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037;
    2. Nanjing Agricultural University, Nanjing 210095
  • Received:2002-03-18 Revised:2002-07-02 Online:2002-10-10

Abstract: Phosphate immobilization and its inhibition in the soil under a Chinese fir (Cunninghamia lanceoata)stand were studied. The results showed that the immobilization of the soil is so strong that most of phosphorus was immobilized. The tree roots had the effect of inhibition on phosphate immobilization to a certain extent,Therefore, the phosphorus immobilized in rhizosphere was less than that in root zone and unroot zone. Organic acid had such effect too. Among them humic acid had the strongest effect on decreasing phosphate immobilization. The second was citric acid, and the third was tartaric acid. When the humic acid, citric acid and tartaric acid were added to soil at 2 5,5 0 and 5 0g穔g-1 respectively, they can protect a lot of phosphorus from immobilization if the acid added to soil was more than 2 5 or 5 0 g穔g-1, their influence would decrease gradually. So we should mix right amount of organic acid with fertiphos when they are applied in forest soil. It, therefore, was necessary to do so for rational application of fertiphos.

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