基于地理加权回归的青龙满族自治县耕地细碎化及影响因子分析
发布时间：2018-08-05 18:46
【摘要】：以青龙满族自治县为例,依据景观生态学相关理论,重点从地块平均面积大小、地块形状的规则度以及地块分布方面选取平均地块面积、边界密度、面积加权平均形状指数和聚集度4个指标,借助数理统计方法和GIS技术对研究区耕地细碎化程度进行测算分级,并应用地理加权回归模型分析了研究区耕地细碎化综合指数与坡度、距村落距离、距河流距离、距道路距离之间的空间关系。结果表明:青龙满族自治县耕地细碎化以中度细碎化和重度细碎化为主,占比分别为45.18%,49.19%;距村落距离、距道路距离与耕地细碎化程度呈负相关关系,距河流距离、坡度与耕地细碎化程度呈正相关关系;各影响因素影响度都表现出了显著的空间非平稳性,且在空间上波动较大。研究所得结论对耕地规模化经营和土地利用效率的提升具有一定的参考意义。
[Abstract]:Taking the Manchu Autonomous County of Azure Dragon as an example, according to the theory of landscape ecology, the average plot area and boundary density are selected from the average area size, the regular degree of the block shape and the distribution of the block, according to the theory of landscape ecology. With the help of mathematical statistics and GIS technique, the area weighted average shape index and aggregation degree were used to measure and classify the degree of fineness of cultivated land in the study area. The spatial relationship between the comprehensive index of cultivated land fragmentation and slope, distance from villages, distance from rivers and distance from roads was analyzed by using geographical weighted regression model. The results showed that the cultivated land of Azure Dragon Manchu Autonomous County was mainly subdivided into moderate and severe ones, the proportions were 45.18 and 49.19.The distance from villages and roads was negatively correlated with the degree of cultivated land fragmentation, and the distance from rivers. There was a positive correlation between the slope and the degree of fineness of cultivated land, and the influencing factors showed significant spatial nonstationarity and large spatial fluctuation. The conclusion of the study has certain reference significance for the improvement of cultivated land scale management and land use efficiency.
【作者单位】： 河北农业大学国土资源学院;
【基金】：河北省社会科学基金2016年度项目“生态文明建设背景下贫困地区的土地多功能转变与响应机制研究”(HB16GL048)
【分类号】：P208;F323.211
本文编号：2166662
[Abstract]:Taking the Manchu Autonomous County of Azure Dragon as an example, according to the theory of landscape ecology, the average plot area and boundary density are selected from the average area size, the regular degree of the block shape and the distribution of the block, according to the theory of landscape ecology. With the help of mathematical statistics and GIS technique, the area weighted average shape index and aggregation degree were used to measure and classify the degree of fineness of cultivated land in the study area. The spatial relationship between the comprehensive index of cultivated land fragmentation and slope, distance from villages, distance from rivers and distance from roads was analyzed by using geographical weighted regression model. The results showed that the cultivated land of Azure Dragon Manchu Autonomous County was mainly subdivided into moderate and severe ones, the proportions were 45.18 and 49.19.The distance from villages and roads was negatively correlated with the degree of cultivated land fragmentation, and the distance from rivers. There was a positive correlation between the slope and the degree of fineness of cultivated land, and the influencing factors showed significant spatial nonstationarity and large spatial fluctuation. The conclusion of the study has certain reference significance for the improvement of cultivated land scale management and land use efficiency.
【作者单位】： 河北农业大学国土资源学院;
【基金】：河北省社会科学基金2016年度项目“生态文明建设背景下贫困地区的土地多功能转变与响应机制研究”(HB16GL048)
【分类号】：P208;F323.211
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1 董洋洋;商水县白寺镇耕地细碎化评价研究[D];河南农业大学;2012年
，本文编号：2166662
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