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Transformation mechanism and availability of nutrients in albic soil-plant system Ⅳ. Effect of environmental factors on phosphorus availability in albic soil.

Li Fayun and Gao Ziqin( Institute of Applied Ecology,Academia Sinica,Shenyang 110015). Chin.J.Appl.Ecol.,1999,10(5):579~582.  
Rhizospheric experiment shows that the contents of soil moisture and organic matter and soil pH are the important factors affecting phosphorus availability in albic soil. Regulating soil moisture content could increase the solubility of iron and aluminum phosphates, and accelerate the diffusion of phosphatic ions from rhizospheric to non rhizospheric soil. High content of organic matter could decrease the free energy of phosphorus adsorption by soil, inducing an increase of Olsen P content. A suitable liming application could adjust the soil pH and enhance the solubility of iron and aluminum phosphates, due to the effect of chemical solution, and improve the biological availability of soil phosphorus.
【Fund】: 国家自然科学基金资助项目
【CateGory Index】: S154.1
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