基于GIS的杭州市耕地质量评价研究

耕地是农业生产最基本的资源，耕地质量的好坏直接影响到农业生产的持续发展。以浙江省杭州市为例，探讨了在GIS系统的支持下，利用测土配方项目获得的耕地质量调查数据及地形地貌、农田水利设施状况等基础数据，通过数学建模的方法，对全市176128 hm2耕地进行了质量评价。结果表明，杭州全市耕地可分为3等5级。一等地、二等地和三等地的面积分别占耕地总面积的21.8%、76.9%和1.3%；一级耕地、二级耕地、三级耕地、四级耕地和五级耕地的面积分别占耕地总面积的0.8%、21.1%、52.6%、24.3%和1.3%；总体上杭州市耕地质量以中上为主，评价得到的耕地分布状况基本符合实际情况，表明将GIS技术运用到耕地地力评价是一个切实可行的方法。对各级别的耕地生产性能与管理对策进行了分析。

Evaluation of Cultivated Land Quality of Hangzhou District Based on GIS

Cultivated land is the most basic resource for agricultural production, and quality of the cultivated land directly affects the sustainable development of agricultural production. In this paper, taking Hangzhou district of Zhejiang Province as an example, GIS technology was applied to evaluate the quality of cultivated land with area of 176128 hm2 by constructing a mathematical model. Survey data obtained from soil testing and formula fertilization project, and basic information of landform and irrigation and water conservancy facilities were used as factors for evaluating the quality of cultivated land. The results showed that quality of Hangzhou district’s cultivated land could be divided into three grades and five levels. The areas of the first, second and third grades of the land accounted for 21.8%, 76.9% and 1.3% of the total area, respectively. The areas of the first, second, third, fourth, and fifth levels of the land accounted for 0.8%, 21.1%, 52.6%, 24.3% and 1.3% of the total area, respectively. The overall quality of cultivated land in Hangzhou district belong the middle and upper level. Evaluation of cultivated land grade distribution using GIS technology is consistent with the actual situation. It is suggested that the GIS technology is a feasible method for evaluating the cultivated land productivity. Production performance and management countermeasures of different levels of the cultivated land are also discussed.