采用Bowman和Cole提出的有机P分组方法,对长期施肥条件下土壤有机P的组成变化以及有机P及其组分与有机质、速效P的关系进行研究。结果表明,活性、中等活性、中等稳定性、高等稳定性有机P分别占有机P总量的80.2%、9.8%、9.0%、和2.0%。有机无机肥配施可明显增加土壤有机P及活性、中等活性有机P、中等稳定性有机P含量,减少高等稳定性有机P含量。施肥对有机P各组分剖面分布规律影响不大。活性、中等活性有机P与速效P、有机质、有机P总量呈显著正相关,中等稳定性、高等稳定性有机P与速效P、有机质不相关。

Variation of soil organic phosphorus fractions, and relationship of organic P and its fractions, with soil organic matter and readily available P were studied with Bowman-Cole method. The results showed that active P₀, moderately active P₀, moderately stable P₀ and highly stable P₀ accounted for 80.2%, 9.8%, 9.0 % and 2.0 % of total P₀, respectively. And combined application of organic manure and inorganic fertilizer significantly increase contents of active P₀, moderately active P₀ and moderately stable P₀, but decreased highly stable P₀. Application of chemical fertilizer increased total amount and activity of P₀. and content of moderately active P₀, but decreased contents of highly and moderately stable P₀, and had no significant influence on distribution of P₀ fractions. Activityand moderately active P₀ showed positive relationship with readily available P, organic matter and total organic P, whereas moderately and highly stable P₀ had nothing to do with readily available P and organic matter.

中国科学院知识创新工程项目KZCX₂-413、自然科学基金资助项目(40171058)。