基于耕地连片度的高标准基本农田建设划区

Zoning of High Standard Prime Farmland Construction Based on Arable Lands Connectivity

为提高高标准基本农田划定区域的耕地连片性,在耕地综合质量评价和耕地连片网络基础上,提出了局部耕地连片度计算公式来评价耕地的连片性,并采用四象限法空间耦合耕地质量和连片度2个时空属性。结果表明:献县高标准基本农田优先建设区域面积为24 803.45 hm^2,重点建设区域面积为19 688.77 hm^2,有条件建设区域面积为19 538.64 hm^2,与面积累加方法相比,优先建设区域连片度提高了15.55%,而有条件建设区域连片度减小了37.82%,表明该方法明显提高了高标准基本农田建设划区的耕地连片度。

To improve the connectivity of high standard prime farmland regions, on the basis of arable land comprehensive quality evaluation and the arable land connected network, a local farmland connectivity calculation formula was proposed to evaluate arable lands connectivity, and four-quadrant method was adopted to space couple farmland quality and connectivity. Firstly, arable land comprehensive quality evaluation system was built from natural quality, site environment and ecological quality by using the analytic hierarchy process. Secondly, on the basis of contiguous thresholds and contiguous rules, the arable land connected network and arable lands connectivity evaluation system was built. Finally, four-quadrant method was adopted to zone high standard prime farmland, which included prioritized construction area, important construction area and conditional construction area, and it can provide reference for the construction of high standard prime farmland. The results showed that the area for prioritized construction was 24 803.45 hm^2, where the arable lands had better quality and higher connectivity; the area for important construction was 19 688.77 hm^2 and 19 538.64 hm^2 for conditional construction area, each region included three types of construction and each construction had different sequences. A global farmland connectivity calculation formula was also proposed. Compared with the method of accumulation area, the connectivity of prioritized construction area was improved by 15.55% , while the connectivity of conditional construction area was decreased by 37.82% , indicating that the method significantly improved the connectivity of high standard prime farmland construction area.