安徽省农田植被固碳特征时空格局演变研究

Spatio-temporal Evolution of Carbon Sequestration Characteristics of Farmland Vegetation in Anhui Province

开展区域农田植被固碳能力在空间结构及其时空变化特征的分析研究,对合理制定区域农业低碳发展政策具有重要意义。以安徽省16个地级市为例,在核算2000~2020年农田植被净固碳量的基础上,运用标准差椭圆以及空间自相关分析等方法,分析农田植被固碳特征变化趋势以及空间格局,并对安徽省各地级市提出差异化农业发展对策。结果表明:①安徽省各地级市农田植被表现出较强的固碳能力,净固碳量呈现“北增南减,北高南低”的空间格局,净固碳强度呈现“北强南弱”的空间格局。②安徽省农田植被净固碳量呈现出西北—东南分布的空间格局,且呈现出向西北方向收缩的聚集态势。③安徽省农田植被净固碳量存在正向空间关联性,局部空间表现为“西北热-东南冷”相对稳定的空间格局,且聚集程度不断增强,即差异越来越明显。

Taking 16 prefecture-level cities in Anhui Province as an example,based on the calculation of the net carbon sequestration amount of farmland vegetation from 2000 to 2020,using standard deviation ellipse and spatial autocorrelation analysis,this paper analyzed the trend and spatial pattern of carbon sequestration characteristics of farmland vegetation,and proposed differentiated agricultural development countermeasures for each prefecture-level city in Anhui province.The results showed that:(1)Farmland vegetation showed strong carbon sequestration capacity in prefecture-level cities of Anhui Province.The net carbon sequestration capacity showed a spatial pattern of"increasing in the north and decreasing in the south,high in the north and low in the south",and the net carbon sequestration intensity showed a spatial pattern of"strong in the north and weak in the south".(2)The net carbon sequestration of farmland vegetation in Anhui Province showed a spatial pattern from northwest to southeast,and showed a trend of contraction and accumulation in the northwest direction.(3)There was a positive spatial correlation between net carbon sequestration of farmland vegetation in Anhui Province,which showed a relatively stable spatial pattern of"hot in the northwest and cold in the southeast",and the degree of aggregation was increasing.