关键词: 生物量, 碳汇, 灰色关联分析, 农业土地利用结构, 农业产业结构

Abstract:

International and domestic researchers have carried out a lot of the work in carbon sequestration since The United Nations Framework Convention on Climate Change was published, but research on the relationship between carbon sequestration and agricultural ecological economic system is still comparatively weak. In order to provide reference about research and practice of the relationship between carbon sequestration and agricultural eco-economic system, this study analyzed carbon sequestration responses to the agricultural eco-economic system in Xiannangou Watershed using grey correlation analysis method combined field sampling, laboratory experiments, and 15 years peasant household survey data. The results showed that Carbon sequestration of forest and grass increased significantly after the implementation of the Grain for Green Project, and annual carbon sequestration increased from 2523.17 Mg to 4562.06 Mg during the period of 1998-2014. Agricultural land use structure and industrial structure had significant effect on carbon sequestration. The adjustment of land use structure increasing the area of forest and grass increased the amount of carbon sequestration; the change of the industry reduced the land pressure and then promoted and secured land use structure by the development of efficient facilities agriculture and the increase of system income and non-agricultural income. It showed that agricultural ecological economic system succession process produced a strong positive effect on 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 to promote a steady increase of carbon sequestration.

Key words: Biomass, Carbon sequestration, Grey correlation analysis, Agricultural land use structure, Agricultural industrial structure