摘要
土地利用/覆盖变化对陆地生态系统碳循环有着显著影响。基于模糊求解的多目标线性规划,对2020年多伦县土地利用最优结构进行求解,估算了此情景下的土壤有机碳储量。结果表明:多伦县2020年最优土地利用结构为:耕地3.31×104hm^2,林地1.37×105hm^2,草地1.84×105hm^2,水域2 300 hm^2,建筑用地5 600 hm^2,难利用土地2.89×104hm^2。最优土地利用结构下,多伦县耕地、林地和草地土壤有机碳储量分别为2.11×109kg、7.76×109kg和1.03×1010kg;3种土地利用方式下总有机碳储量比2009年增加了1.85×109kg。
The process of soil carbon sequestration is an important link in the global carbon cycle,so the subtle changes of soil carbon reserves will be an important impact on the global carbon cycle. There are numerous factors to affect the soil carbon input and output of land ecological system,but the way of land use change is one of the important factors. Land use / cover changes have a significant impact on the carbon cycle of terrestrial ecosystem. The optimal land use structure of 2020 was explored using the method of multi-objective linear programming with fuzzy mathematics. Meanwhile,the soil organic carbon storage was estimated in this scenario. The results showed that the optimal land use structure was cropland,3. 31 × 104hm^2; forestland,1. 37 × 105hm^2; grassland,1. 84 × 105hm^2;water surface area,2 300 hm^2; building area,5 600 hm^2; unused area,2. 89 × 104hm^2. The soil organic carbon storage was 2. 11 × 109 kg,7. 76 × 109 kg and 1. 03 × 1010 kg in cropland,forestland and grassland,respectively.The soil organic carbon storage of all the three land use type increased 1. 85 × 109 kg than 2009. The method combining with multi-objective linear programming and fuzzy mathematics method,can give consideration to both ecological benefit and economic benefit,social benefit and carbon sequestration effect under the premise of maximum approximation each objective function of optimal solution,and then puts forward the effective scheme of land use structure for Duolun County. At the same time,the result shows that under the appropriate land use planning,Duolun County has a great potential for carbon sequestration.
出处
《干旱区研究》
CSCD
北大核心
2016年第1期67-73,共7页
Arid Zone Research
基金
国家自然科学基金重点项目(41030535)
"十二五"科技支撑项目(2011BAC07B01)资助
关键词
多目标线性规划
土地利用方式
土壤有机碳
模糊数学
内蒙古
multi-objective linear programming
land use type
soil organic carbon
fuzzy mathematics
Inner Mongolia
