贵州喀斯特农田生态系统碳足迹时空差异研究

doi:10.16036/j.issn.1000-2650.2019.05.014

摘要/Abstract

摘要： 【目的】探明贵州省碳排放、碳吸收与碳足迹现状,可以为贵州省农田生态系统减源增汇以及农业的可持续发展提供参考。【方法】依据2007—2016年贵州省和贵阳、遵义、六盘水三市农业投入、农作物产量、耕地面积等数据,对贵州省不同尺度农田生态系统碳排放、碳吸收和碳足迹进行估算,分析变化规律并探讨其影响因素。【结果】①2007—2016年贵州省及贵阳、遵义、六盘水三市农田生态系统的碳排放量均呈逐年增长趋势,其中化肥施用产生的碳排放量所占比例最大,分别为68%、73%、81%、72%;2016年贵州省化肥单位面积碳排放达到298.23 kg/hm²。②碳吸收量表现为"上升下降式"波动变化,总体呈增长趋势,其中,水稻碳吸收量所占比例最高,平均为50.9%,但呈减少趋势,蔬菜增幅较大,达到47%。③贵州省农田生态系统存在较大碳生态盈余,农田生态系统碳足迹呈现不断增加趋势。【结论】尽管农业碳吸收量远大于碳排放量,但化肥与农膜所占碳排放比例较大,应是未来农业减源的重点。

关键词: 贵州省, 喀斯特, 农田生态系统, 碳足迹

Abstract: 【Objective】 To explore the status of carbon emission, carbon absorption and carbon footprint in Guizhou Province, and provide reference for the reduction of source and sink of farmland ecosystems in Guizhou Province and the sustainable development of agriculture. 【Method】 Based on the data of agricultural inputs, crop yields and cultivated land in Guizhou Province, Guiyang, Zunyi and Liupanshui from 2007 to 2016, the carbon emissions, carbon absorption and carbon footprint of farmland ecosystems in different scales in Guizhou Province were estimated, then the changing rules were analyzed and its influencing factors were discussed.【Result】 ①The carbon emissions of farmland ecosystems in Guizhou Province, Guiyang, Zunyi and Liupanshui in 2007—2016 showed a year-on-year growth trend, among which the carbon emissions from chemical fertilizer application accounted for the largest proportion, 68%, 73%, 81%, 72% respectively. ②The carbon uptake showed a “rise and fall” fluctuation, and the overall growth trend. Among them, rice carbon absorption accounted for the highest proportion, with an average of 50.9%, but showed a decreasing trend, and vegetables increased by 47%. ③There is a large carbon ecological surplus in the farmland ecosystem of Guizhou Province, and the carbon footprint of farmland ecosystems is increasing.【Conclusion】 Although agricultural carbon absorption is much larger than carbon emissions, chemical fertilizers and agricultural films account for a large proportion of carbon emissions, which should be the focus of future agricultural reduction.

Key words: Guizhou Province, karst, farmland ecosystem, carbon footprint

中图分类号:

S181

白义鑫, 盛茂银, 胡琪娟, 高梦迪. 贵州喀斯特农田生态系统碳足迹时空差异研究[J]. 四川农业大学学报, 2019, 37(05): 685-694.

BAI Yixin, SHENG Maoyin, HU Qijuan, GAO Mengdi. Study on Spatial and Temporal Differences of Carbon Footprint of Karst Farmland Ecosystem in Guizhou[J]. Journal of Sichuan Agricultural University, 2019, 37(05): 685-694.

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