湖北省江陵县耕地土壤养分状况变化分析

以湖北省江陵县1982年和2004年2次土壤调查数据为基础,比较了耕地养分状况的演变特征。结果表明:高有机质含量和极低有机质含量的耕地土壤面积所占比例减少,原来有机质含量中等的耕地土壤面积所占比例增加,总体趋向均一化;土壤全氮含量有明显增高的趋势,可能主要是增施化学氮肥导致的;土壤有效磷含量的变化与有机质含量呈类似趋势,总体上呈升高趋势;土壤钾素含量总体呈耗减状态;土壤微量元素除有效锌、硼缺乏外,有效铜、铁、锰等含量多处于适宜水平。这些结果可为当地合理施肥提供科学依据。

Variations of the Soil Fertilities in Jiangling County, Hubei Province

Based on the investigation of soil fertility of Jiangling County,Hubei Province,this paper compared the changing characteristics of the soil fertilities between 1982 and 2003.Results indicated that the area percentages of soil with high or very low organic matter contents in the total cultivated land have been reduced during the 20 years,therefore,the soil organic matter tended to become universe.Soil total N increased obviously,which might be caused through the chemical N fertilizer application.Soil available P had similar changes with soil organic matter contents and the increasing trend appeared.Soil K contents reduced with the time generally.Soil available Zn,B are in the low situation and soil available Cu,Fe,Mn are in the good situation for most soils.These will provide scientific foundation for the soil management and fertilizer use in the region.