基于景观格局原理的土地规模化整理潜力评价方法

    Evaluation method of land-scaled consolidation potential based on landscape pattern principle

    • 摘要: 土地整理目的主要包括增加土地数量、提高土地质量和生产效率等,土地规模经营是提高土地生产效率的主要方法之一,也是现代规模农业发展的要求。该文探讨利用地形指标,景观丰度指数、斑块方度指数、景观集中度指数等景观格局指标定量评价土地规模化整理潜力的方法,为区域土地整理规划提供科学依据。并以喀斯特山区耕地整理为例,应用GIS(geographic information system)技术定量分析了广西喀斯特山区耕地规模化整理潜力的差异。结果表明,广西都安县大部分位于石山区乡镇的耕地规模化整理潜力指数均很低,而南部河谷区乡镇的耕地规模化整理潜力指数较高,河谷平坦区的耕地规模化整理潜力指数为0.85,喀斯特峰丛峰林山区为0.17,前者为后者的5倍。表明土地规模化整理潜力受到土地资源空间格局和地形格局的共同制约,不同地形和土地资源格局条件下,区域土地规模化整理潜力之间差异显著。

       

      Abstract: The purpose of land consolidation includes to increase land quantity, to enhance land quality and production efficiency. Scalced land management is a main way of enhancing land production efficiency, and it is also the demand of modern scaled agriculture development. The paper focused on discussing a quantitative method for evaluating land scaled consolidation potential (LSCP) using indices including landscape pattern indices such as: patch area, richness index, patch square index, concentration index and terrain indices. The study provided a new method to regional land consolidation planning. By taking the arable land evaluation in the Karst mountain area in Guangxi Zhuang Autonomous Region as a study example, the landscape pattern indices and terrain indices were used combing with GIS technology to evaluate the LSCP in the region. The study results showed that the LSCP comprehensive index of most villiges and towns in Karst mountian areas in Duan Countiy was very low, and the index of the villiges and towns in the river vallvey areas was relative high. The LSCP comprehensive index of the river valley region was 0.85, which was five times more than that of the Karst peak cluster-depressions and Karst peak forest-valley region. The LSCP is strongly restricted by the combination of the spatial landscape pattern of land resource and the terrain characters.

       

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