GIS支持下的湖北省江陵县耕地质量评价及对粮食安全的影响研究

湖北省江睦县是江汉平原上的主要商品粮基地之一，对于湖北省的粮食安全和国民经济的稳定都有着举足轻重的作用。耕地数量减少和耕地质量下降直接影响着全县粮食生产的安全基础。文章结合湖北省荆州市耕地质量评价工作，利用地理信息系统（GIS）作为研究工具，在查清江陵县耕地资源质量、数量及其分布的基础上，科学分析耕地对确保粮食安全的影响。结果表明：江陵县耕地地力可分为1、2、3、4等，其所占耕地面积的比例分别为：23．46％，52，10％，21．14％，3．30％。其中大部分耕地地力处于中上等，说明该地区耕地质量总体水平比较高，为确保粮食安全提供了基础。

On Grain Safety and Quality Evaluation of Cultivated Land in Jiangling County of Hubei Province Based on GIS

As one of the main commodity grain bases of Jianghan Plain,Jiangling County has played a significant role in grain security of Hubei and stability of national economy.It is a direct impact to security base of grain product that the cultivated land quantity reduce and quality drop.Combined the task of quality evaluation of cultivated land in Jiangling County,the quantity,quality and distribution of cultivated land are showed,the relationship between cultivated land and grain security is analyzed scientifically also.With GIS software package,the map of results is drawn.The productivity of cultivated land in Jiangling County is in 1,2,3 and 4 grades,and the percent in areas is 23.46%,52.10%,21.14% and 3.30%,respectively.Most of them are in better than average,showed that the overall level of cultivated land quality in this area is higher.So it is a credible guarantee to Jiangling County's grain security.