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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。
Soil organic acids include low molecular weight organic acids and humic acids that make up the more active fractions of the organic components of the soil. In particular, low molecular weight organic acids play a very important role in soil formation, nutrient and pollutant conversion, and are highly regarded by soil, plant nutrition and environmental scientists. This article focuses on their interaction with phosphorus from the perspective of the research progress. The main contents include: (1) Characteristics of organic acids secreted by phosphorus nutrition and plant roots; (2) Effect of organic acids on soil phosphorus; (3) Desorption, release and transformation of organic acids and phosphorus. The purpose is to promote further research work and provide a scientific basis for rational use of phosphorus and protection of ecological environment.