基于GIS的耕地地力评价研究--以辽宁省瓦房店市北部5乡镇为例

Evaluation of Cultivated Land Fertility Based on GIS-A Case in Five Townships of North Wafangdian

在瓦房店市耕地地力调查和相关资料收集与整理的基础上,采用GIS技术、层次分析法、模糊综合评价法等,对瓦房店市北部5个乡镇的耕地地力进行了评价。结果表明,瓦房店市北部5个乡镇1等地占4.70%;2等地占32.61%;3等地占17.24%;4等地占30.59%;5等地占12.97%,6等占1.88%。结合当地的几种主要的土地利用类型进一步分析得出:果园、菜地和设施农业用地主要集中在1、2、3等地,地力较高,具有较大的生产潜力;旱地主要为4、5等地,说明旱地生产力水平普遍较低。因此,在旱地田间管理上必须重视使用有机肥,培肥地力,提高作物产量,促进农业生产的发展。

On the basis of the investigation of cultivated land Productivity and the relevant data collection, cultivated land fertility in five townships of north Wafangdian was evaluated by using the GIS technique and fuzzy evaluation. The results showed that Wafangdian in northern township grade one to six accounted for 4.70, 32.61, 17.24, 30.59, 12.97, and 1.88% respectively. Considering the major land use types further analysis was done. Fruit garden, vegetable land and installation agricultural land concentrated in one to three grades with high fertility and great production potential. However, dry land was mainly in for four to five grades with low level of productivity. Therefore, in the dryland field management attention should be made by means of use of organic fertilizer to maintain soil fertility and crop yield.