摘要
以15年肥料长期定位试验为基础，采用Bowman-Cole有机磷分组方法，研究长期施肥对潮土耕层有机磷组分及其变化的影响。结果表明：耕层有机磷含量相对较低，有机磷总量为22．35～66．95mg·kg^-1，占土壤全磷的4．47％-9．86％。各组分中以中度活性有机磷为主要部分，占有机磷58．93％．82．40％。长期施肥对土壤各组分有机磷含量产生明显影响，与对照CK相比，PK处理活性有机磷和中度活性有机磷增加，NP处理活性有机磷和中度活性有机磷减少，两处理间差异显著。施用有机肥显著增加耕层土壤中度稳定性有机磷含量。耕层土壤碱性磷酸酶与中稳定性有机磷呈显著正相关。
Based on long-term fertilization experiment （ 15 years） , the Bowman-Cole phosphorus-grouping method was used to study the effect of long-term fertilization on the forms and content of organic phosphorus in calcareous fluvo-aquic soils. The results indicate that organic phosphorus content ranges 22.35 - 66.95 mg· kg^-1 in surface soils, accounting for 4.47% - 9.86% of total organic-P in the soil. Among the various forms of organic P in fluvo-aquic soils, moderately labile organic phosphorus is most predominant, accounting for 58.93% -82.40% of total organic-P content. Long-term fertilization significantly affects organic phosphorus content and forms. Labile organic phosphorus and moderately labile organic phosphorus increase in PK treatment but decrease in NP treatment, with a significant difference between the two. Application of organic manure increases moderately resistant organic phosphorus content in the soil. Significant correlation exists between alkaline phosphatase activity and moderately resistant organic phosphorus （R^2 = 0. 772, P 〈 0.01 ）.
出处
《中国生态农业学报》
CAS
CSCD
2008年第2期331-334,共4页
Chinese Journal of Eco-Agriculture
基金
国家重点基础研究(973)发展计划项目(2002CB4123-02)资助
关键词
潮土
长期定位试验
有机磷
活性有机磷
Fluvo-aquic soil, Long-term experiment, Organic phosphorus, Labile organic phosphorus
