利用网格法确定县域农田整治优先度

为了科学测算农田整治难度系数,合理确定不同评价单元整治的优先次序,该文根据研究区域农田整治特点,以江苏省宝应县为例,以规则网格为评价单元,从土地利用结构、农田空间格局、可提高生产能力、土壤环境质量、人口社会因素等5个影响因素,构建农田整治优先度评价指标体系。对研究区按1′×1′的经纬度网格划分的532个网格评价单元进行农田整治优先度测算,并根据计算结果,按整治优先顺序将整个研究区划分为近期、中期和远期网格单元,分别占42%、31%和27%。远期网格单元分布在宝应县中部和南部的平原区,该区域农田的连片性、细碎度和质量等别等优于其他区域。研究结果表明,该文提出的区域农田整治优先度评价方法,有助于确定农田整治先后顺序,明确优先开展整治区域和方向。该方法为区域土地整治规划提供支撑,也为中国各县市开展高标准基本农田建设提供科学参考。

Determination of consolidation priority for farmland at county level using grid method

In order to scientifically calculate the difficulty coefficient of farmland construction and reasonably determine the priorities of the consolidation units, an indicator system of the farmland consolidation priorities evaluation was constructed. Taking Baoying county, Jiangsu province as an example, the system was based on the study of land use character, with regular grids as evaluation unit, and was from five influencing aspects including land use structure, spatial pattern of farmland, improvable production capacity, soil environmental quality, social population factor on research unit of regular grid. The farmland consolidation priorities of the study area were calculated with 532 grid units of evaluation which were divided by 1' x 1' latitude and longitude grid. Based on the consolidation priorities, the study area were classified into three classes: short term, medium term and long term grid unit, whose ratio was 26%, 35% and 39%, respectively. The long term grids distributed in the central and plain area of southern Baoying county, where had better characters of farmland spatial pattern, low fragmentation degree and better farmland qualities. The results demonstrated that the method proposed in this paper was helpful to determine the farmland consolidation priorities and clarified the priority consolidation areas and directions. This research provides support and scientific reference for regional farmland consolidation planning and high standard basic farmland construction at county level.