基于GIS的珠三角平原耕地地力评价——以广东省中山市为例

【研究目的】为摸清珠三角典型平原的耕地地力现有基本情况，以广东中山市为例进行耕地地力的评价研究。【方法】运用GIS技术，采用模糊数学法、特尔斐法、加乘法则和等距法等进行评价。【结果】结果显示中山市耕地地力水平总体有所上升。高产田面积占耕地总面积的42.17%，中产田占53.72%，低产田仅占4.11％。不同镇区的耕地地力水平存在明显的区域性差异。一年多熟和一年两熟的高产田占比较大，一年一熟则以中产田为主。中低产田主要为灌溉改良型、过砂过粘型、瘠薄培肥型和渍潜稻田型，其中渍潜稻田型的面积最大。【结论】本次耕地地力评价结果符合实际，不仅能反映中山市耕地地力基本现状、指导当地农业生产，还能为中国珠三角典型平原开展耕地地力评价提供有益探索，助力提高耕地地力。

Evaluation of the Farmland Productivity in Pearl River Delta Plain Based on GIS: A Case Study of Zhongshan,Guangdong

【OBJECTIVE】The paper aims to find out the basic situation of the farmland productivity of Pearl River delta plain, the evaluation of the farmland productivity in Zhongshan city of Guangdong province was investigated.【METHOD】Geographic Information System technology(GIS), fuzzy mathematics method, Delphi method, addition-multiplication and the isometric method were employed for the evaluation.【RESULTS】The results showed that the farmland productivity in Zhongshan has generally increased. The area of high-yield farmland accounted for 42.17% of the total farmland area, and the area of middle-yield farmland accounted for 53.72%, while the area of low-yield farmland accounted for only 4.11%. There are obvious regional differences in cultivated land fertility level in different towns. Multiple cropping and double cropping fields were mainly high-yield fields, whilst one cropping fields were mainly middle-yield fields. The middle and low-yield fields mainly included irrigation-improved type, over sandy or sticky type, barren-fertility type and gley-paddy-field type, among which gley-paddy-field type has the largest area.【CONCLUSION】The evaluation results of farmland productivity accorded with the actual situation. It can not only reflect the basic situation of the farmland productivity in Zhongshan city and guide local agricultural production, but also provide a useful exploration for the evaluation of farmland productivity in pearl river delta plain, and help to improve the local farmland productivity.