农牧交错带边界判定方法的研究进展

农牧交错带是我国传统农业区域与牧业区域相交汇的地带， 是我国生态环境的一条过渡带和生态安全的 重要屏障， 为此国内外学者对农牧交错带做了大量的研究， 但是迄今为止对于农牧交错带边界的认识尚未达成共 识。不同学者划分方法不一， 划分标准和指标不一致， 导致划分的农牧交错带在空间上差异很大， 因此有必要对农 牧交错带的边界做进一步的研究。农牧交错带的分布主要受降水等自然因素的限制， 但也与人类对土地利用的方 式密切相关， 因此它更是作为一种土地利用/土地覆被现状存在的。本文在总结以前农牧交错带边界判定研究中主 要用到的方法及存在不足的基础上， 建议从土地利用的角度考虑农牧交错带， 并就边界确定的研究方法做了探讨。

Processes on the Boundary Definition of Agro-pastoral Zone in China

The agro-pastoral zone in China is the ecotone between the traditional agricultural regions and pastoral regions in our country,which is also a fragile zone of eco-environment and a barrier for ecosecurity.Many studies have focused on the agro-pastoral zone and some achievements had been obtained.But there is still no agreement on the boundary definition.For different researchers,the criteria to the boundary definition are different,and then the spatial location and the area of the agro-pastoral zone in China were in difference.Therefore,further studies on boundary definition of eco-environment are needed.The spatial distribution of agro-pastoral zone is controlled by natural factors such as precipitation,but also influenced by human activities intensively.Land use pattern,reflecting the integrative results of natural factors and human activities,can be used for the definition of agro-pastoral zone.Interms of land-use pattern,the agro-pastoral zone is none other than the landscape boundary between farmlands and pastures.In this paper,the processes on the boundary definition of agro-pastoral zone in China were reviewed,and the shortcomings of current studies were summarized.To solve these questions,the spatial analysis methods used in ecotone studies were introduced to the definition of agro-pastoral zone since the agro-pastoral zone is one kind of the ecotones.The spatial analysis methods include spatial clustering analysis,discriminate analysis,spatial statistics analysis and multi-fractal analysis.