摘要
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 Po, moderately active Po, moderately stable Po and highly stable Po accounted for 80.2%, 9.8%, 9.0 % and 2.0 % of total Po, respectively. And combined application of organic manure and inorganic fertilizer significantly increase contents of active Po, moderately active Po and moderately stable Po, but decreased highly stable Po. Application of chemical fertilizer increased total amount and activity of Po. and content of moderately active Po, but decreased contents of highly and moderately stable Po, and had no significant influence on distribution of Pofractions. Activity and moderately active Po showed positive relationship with readily available P, organic matter and total organic P, whereas moderately and highly stable Po had nothing to do with readily available P and organic matter.
出处
《土壤》
CAS
CSCD
北大核心
2003年第5期413-418,共6页
Soils
基金
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)。
关键词
旱地
长期施肥
有机P组分
Dryland, Long-term fertilization, Fractions of organic phosphorus
