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土地整理的碳排放研究对优化土地利用格局、应对气候变化具有重要意义。以河北省邢台市巨鹿县、柏乡县土地整理项目为例,通过间接采样和随机采样方法,分析了土地整理前后玉米地土壤碳排放及其影响因子的变化情况。结果表明:(1)土地整理后,巨鹿县和柏乡县整理区玉米生长旺盛时期的土壤碳排放量增加,但均没有达到统计上的显著性水平,这说明在玉米生长旺盛时期,土地整理项目的开展暂未影响土地整理区土壤的碳排放。(2)在玉米生长旺盛时期,影响土壤碳排放变化的多个因子中,只有巨鹿县土地整理区的土壤碳氮比和柏乡县土地整理区的叶面积指数在土地整理前后发生了显著变化,其他因子虽然变化的大小和方向存在不一致,但是变化量均不显著。
Research on carbon emissions from land consolidation is of great importance to optimizing land use patterns and addressing climate change. Taking Land Consolidation Project in Julu County and Bai County of Xingtai City in Hebei Province as an example, the changes of soil carbon emissions and their influencing factors before and after land consolidation were analyzed by indirect sampling and random sampling method. The results showed that: (1) After land consolidation, the soil carbon emission of maize in the finishing area of Julu County and Baixiang County increased significantly, but did not reach the statistical significant level, indicating that in the period of vigorous growth of corn, land Arrangement of the project has yet to affect the land consolidation area soil carbon emissions. (2) Among the multiple factors affecting the change of soil carbon emissions during the vigorous growth of maize, only the soil carbon and nitrogen ratio in land consolidation area of Julu County and the leaf area index of land consolidation area in Baixiang County were significant before and after land consolidation Changes, other factors Although the size and direction of change there is inconsistency, but the amount of change is not significant.