摘要
基于2002-2021年绵阳市以及9个区县的农地利用、水稻种植、畜禽养殖的12类主要碳源和12类主要农作物碳汇,测算了农业碳源、碳汇、净碳汇总量和净碳汇强度,并分析了其时空特征。结果表明:①绵阳市农业碳排放量呈现先上升再下降的趋势,2016年达到最大值。农业碳汇量、净碳汇总量、净碳汇强度均呈现先减后增的趋势,2006年为最低值;碳汇功能总体表现为上升趋势;②碳排放量较高的地区有三台、盐亭县和江油市,碳排放量较低的地区为平武、北川县,地区差异明显;③碳汇和净碳汇总量空间分布中,三台县为碳汇和净碳汇总量最高的地区,北川、平武、涪城区为较低的地区;④北川和平武两县为农业净碳汇强度较低的2个地区,其余地区间的差异较小,各个区县的农业净碳汇强度虽有波动,但均呈上升趋势。地形条件、农业结构、农业发展水平是碳结构地区差异的主要原因。为此,提出了各地区应因地制宜,制定差别化的农业管理措施,促进农业低碳发展。
Scientific research on net carbon sink and its spatial-temporal pattern of regional farmland can providea reference for low-carbon agricultural development.Based on 12 types of major carbon sources and 12 types of major crop carbon sinks in agricultural land use,rice planting,livestock and poultry breeding,the total amount and intensity of agricultural carbon sources,carbon sinks,net carbon sinks were measured in Mianyang City and nine districts and counties from 2002 to 2021,and their spatio-temporal characteristics were analyzed.The results showed that:①During the study period,the agricultural carbon emissions in Mianyang City generally showed a trend of first rising and then falling,reaching the maximum in 2016.The agricultural carbon sinks,net carbon sinks,and net carbon sinks intensity all showed a trend of first decreasing and then increasing.They were all at their lowest values in 2006.The carbon sink function shows an upward trend.②Santai County,Jiangyou City and Yanting County have higher carbon emissions,while Pingwu County and Beichuan County have lower carbon emissions,with obvious regional differences.③In the spatial distribution of total carbon sink and net carbon sink,Santai County has the highest total carbon sink and net carbon sink,while Beichuan,Pingwu and Fucheng have the lowest total carbon sink.④The agricultural net carbon sink intensity in Beichuan and Pingwu counties is relatively low,while the differences between the other regions are relatively small.Although the agricultural net carbon sink intensity in each district and county fluctuates,it shows an upward trend.The main reasons for regional differences in carbon structure are terrain conditions,agricultural structure,and agricultural development level.Differentiated agricultural management measures should be formulated according to local conditions to promote low-carbon agricultural development.
作者
李华
谭敏
张庆
何慧扬
Li Hua;Tan Min;Zhang Qing;He Huiyang(College of Resource and Environmental Engineering,Mianyang Normal University,Mianyang,Sichuan 621000,China)
出处
《绿色科技》
2023年第21期235-241,248,共8页
Journal of Green Science and Technology
基金
四川省社会科学重点研究基地-四川县域经济发展研究中心项目(编号:xy2022059)。
关键词
农业
净碳汇
时空特征
低碳发展
绵阳市
agriculture
net carbon sink
temporal and spatial characteristics
low carbon development
Mianyang City
