摘要
为进一步摸索耕地土壤肥力的演变和发育规律,以1985年第二次土壤普查数据和2012年测土配方施肥项目采集的大量土壤样品数据为基础,利用Arc GIS软件的空间插值和空间叠加分析功能,对余干县耕地土壤养分的时空变化特征进行分析研究。结果表明:余干县耕地土壤养分整体上呈上升趋势,其中有效磷上升最快,整体提高了2个等级水平;其次是有机质和碱解氮,速效钾略有下降,但整体级别不变。说明耕作方式和栽培管理等因素的改变,改善了余干县耕地土壤肥力状况,为今后进一步合理利用耕地土壤资源,有效利用和管理土壤养分,促进农业健康可持续发展提供了理论依据。
In order to understand the evolution and development law of farmland soil fertility,the spatialtemporal changes of soil nutrient of farmland were analyzed by Arc GIS software based on soil survey data of1985 and 2012 in Yugan County.The results showed that soil nutrients showed on upward trend in the overall,available P increased the fastest,overall improved by two grades; secondly organic matter and available nitrogen,available potassium decreased slightly,but the overall level did not change. Soil fertility of farmland improved,which provided the theory basis for further using soil resources rationally,using and managing soil fertility,and promoting healthy and sustainable development of agriculture. The cultivation fashion and management were the main driving factors in the changes in the farmland soil nutrient in Yugan County。
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2016年第5期986-994,共9页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(41361049)
江西省自然科学基金项目(20122BAB204012)~~
关键词
耕地
土壤养分
时空变异
farmland
soil nutrient
spatial-temporal change
