平原粮食生产核心区耕地细碎化定量评价

发布时间：2018-01-06 21:12

  本文关键词：平原粮食生产核心区耕地细碎化定量评价　出处：《河南农业大学学报》2015年04期 　论文类型：期刊论文

  更多相关文章： 耕地细碎化指数 定量评价指标体系 河南 平原粮食生产核心区

【摘要】：以河南省粮食核心区主体范围内的平原乡镇为研究区域,以行政村为调查和评价单元,探索耕地细碎化定量状况。利用遥感影像、土地利用数据库与实地校核获取研究区域耕地图斑数据,采用层次分析法,选取户均地块数、块均耕地面积、地块密度、景观形状指数、分离度、分维数、土地利用程度、潜在农业人口转移指数8个评价指标构建乡镇尺度的耕地细碎化定量评价体系,进行耕地细碎化量化评价。结果表明:研究区域的耕地细碎化指数CLFI(Cultivated land fragmentation index)为0.769 9,为Ⅲ级,中度细碎化;各行政村耕地细碎化指数CLFI范围在0.689 1~0.980 1,主要分布在0.7~0.8,细碎化等级多属于Ⅲ级,中度细碎化;随着距离乡镇政府所在地白寺村的增加,耕地细碎化指数CLFI逐渐增高,耕地细碎化级别与程度降低;其原因主要是耕地的稀缺性和人口的不断增长,沟渠、道路对耕地的分割,家庭联产承包责任制以及区域经济的发展等。商水县白寺镇耕地细碎化指数CLFI为0.769 9,产权制度下的户均地块数和块均耕地面积对白寺镇耕地细碎化程度的影响较大,户均地块数、地块密度和景观形状指数在总体上限制了CLFI的提高。
[Abstract]:Taking the plain villages and towns in the grain core area of Henan Province as the research area and the administrative village as the investigation and evaluation unit, the paper explores the quantitative status of cultivated land fragmentation and makes use of remote sensing images. Land use database and field check to obtain the study area cultivated land map spot data, using the analytic hierarchy process, select the number of block plots, block average cultivated land area, plot density, landscape shape index, separation degree, fractal dimension. Land use degree, potential agricultural population transfer index, 8 evaluation indicators to build the township scale of farmland fragmentation quantitative evaluation system. The quantitative evaluation of the fineness of cultivated land was carried out. The results showed that the fineness index of cultivated land CLFI(Cultivated land fragmentation index was obtained from the study area. 0.769 9. Grade 鈪，

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