芜湖县实施测土配方施肥10a来耕地土壤中有效磷空间分布及变化特征

该文分析了已实施测土配方施肥技术10a的芜湖县耕地土壤有效磷含量状况及其变化特征。结果表明:该县各镇耕地土壤有效磷除陶辛镇属强变异外,其余各镇均属中等变异。各镇土壤有效磷平均含量在13.90~21.71mg/kg,较2005年,Ⅴ和Ⅵ级土壤所占比例明显下降,Ⅱ、Ⅲ、Ⅳ级土壤比例显著增加。研究旨在为土壤养分科学管理和平衡施肥提供科学依据,为测土配方施肥技术的进一步完善和深入推广提供参考。

Status and Changing Trend of Soil Available P Contents in Cultivated Land from the Implementa-tion of Soil Test and Formula Fertilization for 10 Years in Wuhu County

In the paper,the changing trend of soil available P contents in cultivated land had been analyzed from the implementation of soil test and formula fertilization for 10 years in Wuhu County. The results showed that the coeffi-cient of variation of available soil phosphorus of towns varied moderately except Taoxin town,a strong variation,in cultivated land. The average content of soil available P was between 13.90mg/kg and 21.71mg/kg. Compared with the data in 2005,the ratios of both levels V and VI decreased,while that of levelⅡandⅢandⅣincreased. This arti-cle aimed at providing scientific gist for soil nutrient management and balanced fertilization,meanwhile,providing reference for further improvement and promotion of soil test and formula fertilization.