黄冈市耕地土壤养分状况时空变异分析

摘要

With the application of conventional statistics and GIS technology,the temporal and spatial variation analysis of soil nutrient status data between 1979-1983 and 2005-2016 was carried out in Huangganga city,Hubei province. The survey re-sults showed that,the proportion of the four grades cultivated land of cultivated land in the whole city from 2005 to 2016 was first-class of 27.19%,second-class of 32.73%,third-class of 25.44%,and fourth-class of 14.63% respectively. Compared with 1979 to 1983,the proportion of the first and third class was basically equal,the proportion of the second class decreased,and the proportion of the four class increased sharply. It showed that the farmland productivity was decreasing in general.%以湖北省黄冈市作为研究区,应用常规统计和GIS技术对1979-1983年、2005-2016年两个时期土壤养分状况数据进行了时空变异分析.结果显示,2005-2016年4个级别的耕地占全市耕地总面积的比例分别为一等地27.19%,二等地32.73%,三等地25.44%,四等地14.63%;与1979-1983年相比,一等地和三等地比例基本持平,二等地比例下降,四等地比例大幅上升,说明耕地地力总体呈下降趋势.