信宜市耕地整理潜力评价

信宜市是广东省粮食生产的重要基地，但是由于其地形限制及经济社会发展带来的建设用地占用、分割耕地的现象，信宜市的耕地利用状况不容乐观，耕地整理迫在眉睫。该研究以行政村为评价单元，从可利用空间扩展潜力、生产力提高潜力、生态景观改善潜力3方面构建评价指标体系，采用模糊综合评价模型对信宜市的耕地整理潜力进行评价。结果显示，除了西南部的镇隆、水口、北界等镇外，信宜市其余乡镇的耕地整理潜力均较高。根据耕地整理评价指标和评价结果，结合评价单元所处的区域情况，有针对性地提出坡改梯、排灌工程建设和田块平整3种耕地整理类型，并测算出每种类型的规模：坡改梯2684．39hm^2；排灌工程建设2151．17hm^2；田块平整1763．39hm^2。

Evaluation on the Arable Land Consolidation Potentiality of Xinyi

Xinyi is an important grain production base for Guangdong Province. However, the arable land utilization condition in Xinyi is not satisfying due to the restrain of local terrain and the occupation and division of construction land which is brought by the increasing social econo- my. As a result, the arable land consolidation in Xinyi is urgent. This paper took administrative villages as evaluation units, developing a set of grading indicator system from three aspects including spatial expanding potentialities, productive increasing potentialities, ecological and land- scape improving potentialities, and then evaluated the arable land consolidation potentiality of Xinyi on the basis of the building of a fuzzy com- prehensive evaluation model. The results showed that most villages of Xinyi had a high grade of arable land consolidation potentialities except those in the south-west towns like Zhenlong, Shuikou and Beijie. According to the evaluation indicator and the grading results of the evaluation, the paper put forward three different consolidation types ： slope to terrace, the construction of irrigation and drainage project and the leveling and normalization of fields, and calculated the consolidation scale of each type ： slope to terrace 2 684.39 hm2, construction of irrigation and drainage project 2 151.17 hm^2, leveling and normalization of fields 1 763.39 hm^2.