江苏省海安县耕地土壤肥力定位调查与分析

Investigation and analysis On soil fertility of cultivated farmland in Hai’粕County，Jjangsu Pl vinoe

摘要: 对江苏省海安县耕地土壤肥力近1000个定位样点调查分析结果表明，2001～2002年海安县耕地土壤有机质、全N、速效磷、速效钾含量分别比1991年增加9．8％、7．4％、190％和18．3％，分别比1982年增加41．3％、31％、245．2％和18．6％，土壤理化性状明显改善。其土壤肥力演变与该县种植业、养殖业和加工业良性循环，大量施用优质有机肥，全面推广平衡施肥技术以及改良与优化种植结构和耕作方式有关。

Abstract: Nearly 1000 fixed positions were investigated and analyzed in Hai’an County，Jiangsu Province．The results shoW that the cuhivated soil organic matter，total N，available P，available K increase by 9．8％，7．4％，190％ and 18．3％respectively，higher than those in 1991，and by 41．3％，31％，245．2％ and 18．6％ respectively，higher than those in 1982．The soil physical and chemical properties are improved grea tly．The evolution of soil fertility is related to the eoordi-nate development in planting，breed ing and processing，manuring of a grea t quantity of organic fertilizer，spreading of bal-anced fertilization technique，and optimizing of planting system and tillage mode in the county．