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退耕地林草碳汇及对农业生态经济系统的响应——以县南沟流域为例
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摘要
《联合国气候变化框架公约》之后国内外学者开展了大量碳汇方面的工作,而碳汇与农业生态经济系统关联性的研究较为薄弱。因此,作者通过野外采样和室内实验,结合课题组累积的15年农户调研资料,利用灰色关联分析方法,分析县南沟流域碳汇对农业生态经济系统的响应,以期为碳汇与农业生态经济系统的研究与实践提供参考。结果表明:退耕还林(草)工程实施以来,林草碳汇显著增加,年碳汇增量从2523.17 Mg增加至4562.06 Mg。在碳汇增加的过程中,农业土地利用结构和产业结构的演替对其产生了较强的正向效果,土地利用结构调整通过扩大林草面积增加碳汇量;产业结构的变化通过高效设施农业的发展和非农收入的增加减轻对土地的压力,进而促进和稳固土地利用结构。根据研究结果,建议今后应进一步优化农业系统结构,以促使林草碳汇的稳定增加。
In order to provide reference about research and practice of the relationship between carbon sequestration and agricultural ecological economic system,the author analyzes carbon sequestration responses to the agricultural eco-economic system in Xiannangou Watershed using grey correlation analysis method,through field sampling,and laboratory experiments and accumulated 15 years peasant household survey data,because international and domestic academics have carried out a lot of the work in carbon sequestration since The United Nations Framework Convention on Climate Change was published,but research about the relationship between carbon sequestration and agricultural ecological economic system is comparatively weak.The results show that Carbon sequestration of forest and grass increased significantly after the implementation of the Grain for Green Project,annual carbon sequestration was increased from 2523.17 Mg to 4562.06 Mg during the period of 1998—2014.Agricultural land use structure and industrial structure have significantly effected on carbon sequestration.The adjustment of land use structure increased the amount of carbon sequestration by increasing the area of forest and grass;the change of the industry reduced the land pressure to promote and secure land use structure by the development of efficient facilities agriculture and the increase of system income and non- agricultural income,also developed towards the area increase and the quality improvement of forest and grass.That is to say,agricultural ecological economic system succession process has produced a strong positive effect to carbon sequestration potential.According to the results,we should further optimize the structure of agricultural system,adjust the stand structure and improve the quality of grass in order to promote a steady increase of carbon sequestration.
引文
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