环渤海地区县域耕地景观细碎化时空变异分析——以昌黎县为例

发布时间：2018-01-05 12:18

本文关键词：环渤海地区县域耕地景观细碎化时空变异分析——以昌黎县为例　出处：《中国农业资源与区划》2017年08期 　论文类型：期刊论文

【摘要】：[目的]耕地细碎化使耕地的生态系统完整性受到威胁,不利于耕地的规模化经营。因此,探讨县域耕地景观细碎化状况,分析其时空变化态势,对维护耕地生态系统稳定、推进耕地规模利用具有重要意义。[方法]文章以村为单位,从斑块面积、斑块形状和斑块分布状况3方面构建昌黎县耕地景观细碎化评价指标体系,在确定各耕地景观细碎化指数分级标准和权重基础上,采用综合指数模型计算各村域耕地景观细碎化度,分析了昌黎县1996~2014年耕地景观细碎化的时空动态变化。[结果]1996年、2006年和2014年,耕地景观达到轻度细碎化的行政村数量占比分别为57.33%、41.78%和34.44%,达到中度细碎化的行政村数量占比分别为40.89%、54.67%和62.22%。达到轻度细碎化程度的行政村数量逐渐减少,中度细碎化行政村数量逐渐增多;空间分布上,昌黎县北部的十里铺乡、两山乡细碎化严重,北部的昌黎镇和西北部的朱各庄镇次之,昌黎县各行政村耕地景观细碎化程度不一。[结论]针对不同区域,昌黎县需采取预防或综合整治措施,防止细碎化程度的加强。
[Abstract]:[Objective] land fragmentation to the integrity of the ecosystem of farmland is threatened, the scale is not conducive to the operation of cultivated land. Therefore, to study the county farmland landscape fragmentation status, analyze the change trend of cultivated land ecological system, maintain stability, promote the scale of cultivated land is of great significance. This paper use the method for the unit with the village, from the plaque area, the construction of Changli county farmland landscape fragmentation evaluation index system of 3 aspects of patch shape and patch distribution, as determined by the farmland landscape fragmentation index classification criteria and weights on the basis of the comprehensive index model of cultivated land landscape fragmentation degree of the village, analyzes the spatio-temporal dynamic change of cultivated land in Changli county. The results of 1996~2014 fine landscape the]1996, in 2006 and 2014, the number of administrative villages in mild to farmland landscape fragmentation accounted for 57.33%, 41.78% and 34.44%, reached the degree of fragmentation The number of administrative villages accounted for 40.89%, 54.67% and 62.22%. to the number of administrative villages in mild fragmentation decreased, moderate fragmentation gradually increased the number of administrative villages; the spatial distribution, the north of Changli County in ten Pu Xiang Shan, two serious fragmentation, the northern town of Changli and the northwest of Zhu Ge Zhuang the town of Changli County, the village of farmland landscape fragmentation is not a conclusion. According to different regions, Changli county should take comprehensive measures to prevent or prevention, strengthen the level of fragmentation.

【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】：F323.211
【正文快照】： 0引言随着京津冀一体化上升至国家战略,该区域的发展必将会对环渤海地区的土地利用布局产生显著影响。一方面,依托其良好的地形、土壤和水热条件,环渤海地区已成为我国主要的粮食产区[1];另一方面,河北省具有环抱京津的区位优势,其沿海地区被作为承接首都第二产业转移的重化产

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