巩义市用地结构优化对碳储量的影响  

The influence of land use structure optimization on carbon storage in Gongyi City

作　　者：宋艳华[1] 杨建波[1] 王自威 田燕[1] 袁晨光 SONG Yan-hua;YANG Jian-bo;WANG Zi-wei;TIAN Yan;YUAN Chen-guang(Institute of Geographical Sciences,Henan Academy of Sciences,Zhengzhou 450052,China)

机构地区：[1]河南省科学院地理研究所,郑州450052

出　　处：《湖北农业科学》2025年第2期75-83,共9页Hubei Agricultural Sciences

基　　金：河南省软科学研究计划项目(242400410343);河南省科学院科技智库研究项目(230701007)。

摘　　要：建立了基于低碳导向的巩义市土地利用结构优化模型,并采用情景模拟方法,研究了巩义市土地利用结构优化以及用地效率改变对碳储量的影响。结果表明,(1)2011—2018年,巩义市各土地利用类型面积均出现显著变化,并造成了碳储量的明显变化。8年间,耕地碳储量从412.27万t下降到405.41万t,林地和草地也分别下降了4.67万t和2.64万t;耕地向建设用地的流出造成土壤和植被碳储量的显著减少,幅度分别为7.70万t和2.46万t,说明建设占用耕地除了造成最直接的地面植被碳储量的减少外,对土壤碳储量的影响更为巨大。(2)经过土地利用结构优化,各土地利用类型的总碳储量比基期年增加了64.16万t,与2030年自然发展状态相比增加了78.97万t,说明在总土地面积固定的情况下,土地利用结构的优化可以提升区域总体碳储量。(3)用地效率提升情景模拟结果显示,耕地和林地的用地效率提升后,耕地碳储量提升了23.40万t,林地提升了142.43万t,总体碳储量提升165.83万t;与自然发展状态下的2030年相比耕地碳储量提升了21.41万t,林地提升了225.72万t,总体碳储量提升244.80万t,说明在土地利用结构优化基础上,用地效率的提升可以进一步增加土地利用类型的碳储量。可见土地利用结构优化和用地效率提升均可以对区域碳储量的变化起到促进作用。The optimization model of land use structure in Gongyi City aiming at low carbon emission was established.The effects of land use structure optimization and land use efficiency change on carbon storage in Gongyi City were studied by the scenario simulation method.The results showed that,①from 2011 to 2018,the area of all land use types in Gongyi City showed significant changes,which resulted in significant changes in carbon storage.In 8 years,the carbon storage of cultivated land decreased from 4122700 tons to 4054100 tons,and that of forest land and grassland also decreased by 46700 tons and 26400 tons,respectively.The outflow of cultivated land to construction land resulted in a significant decrease in soil and vegetation carbon stocks,with a range of 77700 tons and 24600 tons.It showed that the conversion of cultivated land to construction land not only reduced the carbon storage of vegetation,but also had a greater impact on soil carbon storage.②After the optimization of land use structure,the total carbon storage of each land use type increased by 641600 tons compared with the base period.This was an increase of 789700 tons compared to the natural development in 2030.It showed that the optimization of land use structure could improve the regional total carbon storage when the to⁃tal land area was fixed.③The simulation results of land use efficiency improvement scenario showed that after land use efficiency im⁃provement of cultivated land and forest land,carbon storage of cultivated land increased by 234000 tons,forest land increased by 1424300 tons,and overall carbon storage increased by 1658300 tons.Compared with 2030 under the state of natural development,the carbon storage of cultivated land increased by 214100 tons,the forest land increased by 2257200 tons,and the overall carbon storage increased by 2448000 tons.It showed that on the basis of the optimization of land use structure,the improvement of land use efficiency could further increase the carbon storage of land use type.It could be seen

关 键 词：用地结构优化 碳储量 固碳效应 情景模拟 巩义市 

分 类 号：F301.21[经济管理—产业经济] S181[农业科学—农业基础科学]