基于GIS的鄂州市中低产耕地评价及其改良利用

Evaluation of middling and low yield agricultural land in Ezhou based on GIS and its amendment method

利用GIS技术,运用模糊数学和层次分析方法对鄂州市的中低产耕地进行综合评价,并分析其障碍因素,结果表明,在鄂州市现有40892.3 hm2耕地中,三等以下的中低产耕地30169.3 hm2,占耕地总面积的73.78%,其中渍涝潜育型、干旱灌溉型、瘠薄培肥型、障碍层次型等4类中低产耕地分别占总耕地的22.84%、25.04%、16.76%和9.14%。根据中低产耕地的限制因素及其空间分布,划分为水网平原潮土田区、低丘垄岗红黄土区和低山丘陵红沙泥土区3个区域,并针对不同区域特点,提出了切实可行的改良利用措施。

A comprehensive evaluation of middle- and- low yield cultivated land in Ezhou was carried out based on GIS, AHP, and fuzzy mathematics. The limiting factors were appraised. Result showed that total area of Ezhou is 40892.3 hm^2, and area below level 3 is about 30169.3 hm^2, which amounts to 73.78% of the total cultivated lard. Most of low yield land belonged to four types, i.e., waterlogged, irrigated, infertile and obstructed horizons. These types accounted for 22.84%, 25.04%, 16.76%, and 9.14% of the total, respectively. According to the limiting factors for low yield land and its spatial distributions, it was divided into three districts, which were chao- earth plain region with waters, red - and - yellow soil region with low hills and red - sand- earth region with low mountains. In line with the characters for different regions, the proper amending measures were put forward.