土壤有机酸与磷素相互作用的研究

土壤有机酸包括低分子量有机酸和腐殖酸,它们构成土壤有机组分中性质较活跃的部分。特别是低分子量有机酸,在土壤形成、养分和污染物的转化过程中起着十分重要的作用,受到土壤、植物营养和环境科学工作者的高度重视。本文着重从它们与磷素相互作用的角度,阐述有关研究进展。主要内容包括:(1)磷营养与植物根系分泌有机酸的特征;(2)有机酸对土壤吸附磷的影响;(3)有机酸与磷的解吸、释放与转化。旨在促进研究工作的深入,并为合理利用磷素,保护生态环境提供科学依据。

Interaction of Organic Acids and Phosphorus in Soils

Soil organic acids consist of low molecular weight organic acids(LMWOA) and humus acids. They are active components of organic substances. Particularly, LMWOA play a very important role in soil genesis and cycle of nutrients and pollutants, therefore, they are studied widely and emphasized by soil , plant nutrition and environmental scientists. In this paper, the advancement of interaction between organic acids and phosphorus has been discussed. The main contents are: (1) phosphorus nutrition and characteristics of root exudates; (2) effects of organic acids on adsorption of phosphate; (3) organic acids and phosphate desorption, release and transformation. The purpose is to deepen the research in the area and provide scientific basis for phosphorus utilization and protection of eco-environment.