基于村域尺度的鄂北地区耕地时空变化特征分析——以湖北省随县厉山镇为例

为分析与掌握耕地资源的空间分布及其时空变化规律,切实提高耕地保护与建设水平,以湖北省随县厉山镇2009和2015年土地利用现状数据为基础,综合运用耕地集中度指数、核密度和空间自相关分析对耕地的空间分布及其时空变化特征进行研究。结果表明:1)2009和2015年厉山镇耕地空间分布密度具有明显的集聚特征,核密度最大值分别为31和38块/km~2,且在时间尺度上有进一步增大的趋势;2)2009—2015年厉山镇耕地总量减少,且主要集中在厉山镇北部和西南部,减少面积达434.20 hm~2,占耕地减少总面积的89.20%;3)2009和2015年厉山镇耕地规模以中型耕地集中村为主,但大型耕地集中村所在行政村耕地占总耕地比例最大,分别为55.55%和56.08%,超过了小型和中型耕地集中村耕地所占总耕地比例之和;4)2009和2015年厉山镇行政村耕地面积比的全局空间自相关Moran’s I分别为0.525 1和0.397 0,耕地的空间分布具有显著的空间自正相关;局部自相关来看,耕地分布较多的区域主要集中在同心村和宇宙村,耕地分布较少的区域集中在以车水沟村以北的山区。

Temporal and spatial variation characteristics of cultivated land in northwest Hubei Province based on village scale: A case study of Lishan Town,Suixian County,Hubei Province

In order to analyze and master the spatial distribution of cultivated land resources and its temporal and spatial changes,and improve the level of cultivated land protection and construction,based on the data of land use in 2009 and 2015 in Lishan Town,Sui County,Hubei Province,the cultivated land concentration index,nuclear density and spatial autocorrelation analysis were adopted to study the spatial distribution and temporal and spatial variation characteristics of cultivated land.The results showed that:1) In 2009 and 2015,the spatial distribution density of cultivated land in Lishan Town displayed obvious agglomeration characteristics,and its maximum nuclear density were 31 and 38 per km²,respectively.There is a trend of further increase on the time scale.2) During 2009 to 2015,the total amount of cultivated land in Lishan Town decreased,which reduced by 434.20 hm²,accounting for 89.20% of the total area of cultivated land reduction.The area of area reduction was mainly concentrated in the north and southwest of Lishan Town.3) In 2009 and 2015,the scale of cultivated land in Lishan Town was mainly concentrated in medium-sized cultivated land,but the cultivated land in the administrative village where the large-scale cultivated land concentrated area accounted for the largest proportion of total cultivated land,which were 55.55% and 56.08%,respectively.It was larger than the sum of the proportion of the total cultivated land in small and medium-sized cultivated land.4) The global spatial autocorrelation Moran''s I of the area ratio of cultivated land in the administrative village of Lishan Town in 2009 and 2015 were 0.5251 and 0.3970 respectively,and the spatial distribution of cultivated land had significant spatial self-positive correlation.According to the local autocorrelation,the areas with more cultivated land distribution were mainly concentrated in Tongxin Village and the Yuzhou Village,and the areas with less cultivated land were concentrated in the mountainous area north of Cheshuigou Village.