自然资源学报

自然资源学报 ›› 2011, Vol. 26 ›› Issue (10): 1758-1767.doi: 10.11849/zrzyxb.2011.10.012

• 资源评价 • 上一篇    下一篇

基于景观指数的细碎化对耕地利用效率影响研究——以扬州市里下河区域为例

李鑫, 欧名豪, 马贤磊   

  1. 南京农业大学 土地管理学院,南京 210095
  • 收稿日期:2011-03-07 修回日期:2011-05-03 出版日期:2011-10-20 发布日期:2011-10-20
  • 通讯作者: 欧名豪(1964- ),男,博士生导师,教授,主要研究方向是土地利用规划与管理。
  • 作者简介:李鑫(1986- ),男,山东临沂人,博士生,主要研究方向为土地可持续利用与土地规划。
  • 基金资助:

    国家重大社科基金项目"土地和矿产资源有效供给与高效配置机制研究"(09&ZD046)。

Analysis on Impact of Fragmentation Based on Landscape Index to Cultivated Land Use Efficiency—A Case on Lixiahe District in Yangzhou City

LI Xin, OU Ming-hao, MA Xian-lei   

  1. Collage of Land Management, Nanjing Agriculture University, Nanjing 210095, China
  • Received:2011-03-07 Revised:2011-05-03 Online:2011-10-20 Published:2011-10-20

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摘要： 从中观尺度研究细碎化对耕地利用效率影响,探寻遏制细碎化水平降低因素,以为高效农地利用政策制定提供依据。选取景观指数量化耕地细碎化水平,用数据包络分析(DEA)法对耕地利用效率进行评价,最后采用计量经济模型检验细碎化对耕地利用效率影响。结果表明:研究区扬州市里下河区域30个乡镇的耕地利用综合效率、纯技术效率与规模效率的平均值分别是0.949 3、0.972 2和0.977 0,具有一定提升空间;表征细碎化的第一主成分与地块平均面积、地块密度、面积加权形状指数和面积加权分维数的载荷值大于88%,第二主成分与边界密度指数载荷值大于91%;第一主成分对纯技术效率与规模效率的影响弹性是-0.002 7和-0.085 6,第二主成分对纯技术效率与规模效率的影响弹性是-0.001 1和-0.002 4。细碎化对耕地利用规模效率与纯技术效率产生显著负影响,且对规模效率影响大于对纯技术效率影响;应从地块面积、分布与形状等方面来降低细碎化程度以提高耕地生产能力。

关键词: 耕地利用, 景观指数, 细碎化, 扬州市里下河区域

Abstract: The purpose of this paper is to study the impact of fragmentation on cultivated land use efficiency from meso-scale point of view, to explore factors reducing the level of fragmentation, so as to provide the basis for the formulation of efficient agricultural land use policy. The paper first selects landscape index to quantify the cultivated land fragmentation level, and then evaluates the efficiency of cultivated land using the Data Envelopment Analysis (DEA) model, based on this, it can test the impact which fragmentation exerts with econometrics models. The results show that: the average of the overall efficiency, pure technical efficiency and scale efficiency of cultivated land use were 0.9493, 0.9722 and 0.9770 respectively in the study area, so there is a certain room to improve efficiency in most towns; the correlation coefficient between the first principal component and the average area of land, land density, area weighted shape index and area weighted fractal dimension is separately more than 88%, the second principal component and the edge density index is more than 91%; the flexibility affect coefficient between the first and pure technical efficiency and scale efficiency are -0.0027 and -0.08561, between the second and pure technical efficiency and scale efficiency are -0.0011 and -0.0024 respectively. It can be drawn: fragmentation has negative effect both on pure technical efficiency and on scale efficiency, and the impact on scale efficiency is greater than on pure technical efficiency; the level of fragmentation should be reduced from land area, distribution and shape in order to improve cultivated land productivity.

Key words: cultivated land use, landscape index, fragmentation, Lixiahe district

中图分类号: 

  • F301.24