干旱地区农业研究2016，Vol.34Issue(5)：240-248,9.DOI:10.7606/j.issn.1000-7601.2016.05.37
近20年新疆农田生态系统碳足迹时空变化
Temporal and spatial differences in carbon footprint of regional farmland ecosystem in Xinjiang during recent 20 years
摘要
Abstract
Statistic data on investment in farmland production and yield in Xinjiang from 1994 to 2013 were collect-ed ,and the carbon emissions coefficient method was employed to estimate the carbon emissions and absorptions of farm -land ecosystems and carbon footprints in Xinjiang and their distribution in counties and cities .The results showed that the carbon emissions of farmland ecosystem in Xinjiang were increased from 1 .7946 million tons in 1994 to 4 .7415 million tons in 2013 .Carbon emissions were mainly derived from increased agriculture fertilizer usage over years and irrational ir -rigation methods ,with biggest contribution rates of 40 .02% and 41 .56% ,respectively .Carbon absorption in farmland ecosystem was increased by 21 .8504 million tons over 20 years ,contributing the most to the carbon absorption in farm-land ecosystem of Xinjiang ,and its annual average contribution rate reached 47% .Farmland ecosystem carbon emissions and carbon absorption in Xinjiang area presented the obvious spatial agglomeration in some counties and cities in southern Xinjiang and displayed a trend of being symmetrical along the Tianshan mountain .Farmland ecosystem carbon footprints showed a trend of rapid growth ,from 2 732 .63 × 104 C·hm - 2 ·a - 1 in 1994 to 4 474 .89 × 104 C·hm - 2·a - 1 in 2013 . Carbon footprint had increased by 283 .59 × 104 C·hm - 2 ·a - 1 ,indicating that carbon ecological surplus was found in farmland ecosystems of Xinjiang .In 11 years ,the planting structure ecological indexes were greater than 1 .Therefore , adjustment of planting structure is imminent .关键词
农田生态系统/碳足迹/碳排放/碳吸收/时空变化Key words
farmland ecosystem/carbon footprint/carbon emission/carbon absorption/spatial and temporal variations分类
农业科技引用本文复制引用
王敬哲,刘志辉,张波..近20年新疆农田生态系统碳足迹时空变化[J].干旱地区农业研究,2016,34(5):240-248,9.基金项目
水利部公益性项目“内陆干旱区实施最严格水资源管理关键技术”（201301103）；国家自然科学基金重点项目“干旱区湖泊流域陆面过程及人类活动适应性---以艾比湖流域为例” （）
