巩义市用地结构优化对碳储量的影响

doi:10.14088/j.cnki.issn0439-8114.2025.02.012

摘要/Abstract

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,①2011—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。

关键词: 用地结构优化, 碳储量, 固碳效应, 情景模拟, 巩义市

Abstract: 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,① from 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 4 122 700 tons to 4 054 100 tons, and that of forest land and grassland also decreased by 46 700 tons and 26 400 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 77 700 tons and 24 600 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. ② After the optimization of land use structure, the total carbon storage of each land use type increased by 641 600 tons compared with the base period. This was an increase of 789 700 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 total land area was fixed. ③ The simulation results of land use efficiency improvement scenario showed that after land use efficiency improvement of cultivated land and forest land, carbon storage of cultivated land increased by 234 000 tons, forest land increased by 1 424 300 tons, and overall carbon storage increased by 1 658 300 tons. Compared with 2030 under the state of natural development, the carbon storage of cultivated land increased by 214 100 tons, the forest land increased by 2 257 200 tons, and the overall carbon storage increased by 2 448 000 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 that the optimization of land use structure and the improvement of land use efficiency could play a positive role in promoting the change of regional carbon stocks.

Key words: land use structure optimization, carbon storage capacity, carbon sequestration effect, scenario simulation, Gongyi City

中图分类号:

F301.21
S181

宋艳华, 杨建波, 王自威, 田燕, 袁晨光. 巩义市用地结构优化对碳储量的影响[J]. 湖北农业科学, 2025, 64(2): 75-83.

SONG Yan-hua, YANG Jian-bo, WANG Zi-wei, TIAN Yan, YUAN Chen-guang. The influence of land use structure optimization on carbon storage in Gongyi City[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(2): 75-83.

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