基于景观指数的耕地细碎化研究——以四川盆地5个典型村为例  

Fragmentation of Cultivated Land Based on Landscape Index ——A Case Study of Five Typical Villages in Sichuan Basin

作　　者：唐文彬 王佑汉[2] 李谦 TANG Wenbin;WANG Youhan;LI Qian(Academic of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;College of Land and Resources,China West Normal University,Nanchong Sichuan 637009,China;College of Business,China West Normal University,Nanchong Sichuan 637009,China)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]西华师范大学国土资源学院,四川南充637009 [3]西华师范大学商学院,四川南充637009

出　　处：《西华师范大学学报（自然科学版）》2019年第4期413-419,共7页Journal of China West Normal University(Natural Sciences)

基　　金：西华师范大学基本科研业务项目(17C033);西华师范大学科研创新团队(CXTD2017-7);西华师范大学英才科研基金项目(17YC125)

摘　　要：研究村域尺度下的耕地细碎化现象,可以为解决农村耕地撂荒情况提供参考。文章基于农村实地调研数据,通过景观指数衡量细碎化程度,并进一步探究耕地细碎化与各村撂荒地比重之间的关系,结果表明:(1)权属细碎化与自然细碎化条件下的景观指数相比,斑块数量、斑块密度和边缘密度有明显增加,说明在人为因素影响下,耕地细碎化程度有所增加。(2)自然条件和权属条件下的主成分具有相似性,其中第一主成分F1与斑块数量、斑块密度、平均面积和聚集度指数的绝对载荷系数值大于0.86,表达耕地空间分布特征;第二主成分F2与面积加权形状因子和面积加权分维数的载荷值大于0.93,表达地块的形状特征。(3)权属细碎化条件下的回归模型是反映耕地细碎化与撂荒地比重关系的最优模型,拟合度达0.998,说明耕地细碎化程度对土地撂荒有显著影响。The study of land fragmentation phenomenon under the village scale can provide a reference for solving the problem of farmland abandonment.Based on the data of rural field investigation,this paper measures the degree of fragmentation by landscape index,and further explores the relationship between the fragmentation of farmland and the proportion of abandoned land in each village.The results show that:(1)By comparing the landscape index of ownership fragmentation with that of natural fragmentation,it is found that the number of patches,patch density and edge density have increased obviously,which indicates that the degree of fragmentation of farmland has increased under the influence of human factors.(2)Similarity is found between the principal components of natural and ownership conditions.The absolute load value of the first principal component F1 to the number of patches,patch density,average area and aggregation index is greater than 0.86,expressing the spatial distribution of cultivated land.The characteristic load value of the second principal component F2 to the area weighted shape factor and the area weighted fractal dimension is higher than 0.93,representing the shape feature of the parcel.(3)The regression model under the ownership fragmentation is the best model to reflect the relationship between the fragmentation of farmland and the proportion of abandoned land.The goodness of fit is 0.998,indicating that the degree of farmland fragmentation has a significant impact on land abandonment.

关 键 词：自然细碎 权属细碎 耕地撂荒 景观指数 四川盆地 

分 类 号：S342.4[农业科学—作物栽培与耕作技术] F323.21[农业科学—农艺学]