耕地分等方法的改进与合理性探讨——以闽侯县为例

借助GIS和数学模型集成技术,通过方法改进、数据更新和因子体系完善等手段,重新评价区域耕地等别,并与旧分等成果进行对比分析,探讨区域耕地分等改进的合理性.结果表明:闽侯县基本农田保护区耕地质量总体水平不高,以中低质量等别耕地占优势;评定方法改进后闽侯县高、中、低质量等别耕地地理空间分布更合理,质量等别与实际土种类型的肥力和产出水平也更加吻合;耕地分等结果更符合客观实际.

Research of the improvement and rationality on cropland grade evaluation-taking Minhou for example

The grade of regional cultivated land was reappraised by means of data update,method improving and factor system based on GIS and integrated mathematical models.The rationality of improving the grade of regional cultivated land was researched by comparatively analysing the results of old and new grade evaluation.The results were as follows: the overall level of basic farmland preservation areas of Minhou County was not high,the regional cultivated land at low and middle levels was dominant;through improving evaluation method,the geospatial distribution of cultivated lands in Minhou County at high,middle and low quality levels was more reasonable,which was more identical to land quality grading,actual fertility of soil types and output level;the land grading results were more in line with actual situation.