北京市农田生态系统碳汇及释氧功能年际变化研究

发布时间：2018-01-05 22:14

本文关键词：北京市农田生态系统碳汇及释氧功能年际变化研究　出处：《生态经济》2016年01期 　论文类型：期刊论文

【摘要】：以北京农田生态系统作为研究对象,对2004~2012年农田生态系统的碳汇及释氧功能的年际变化进行了研究,结果表明:北京市农田生态系统氧气释放量总体呈现逐年增加趋势,以2008年最高,年平均氧气释放量为270.9万吨,农田生态系统中粮食作物的年均氧气释放量所占比例最高为80.1%,在粮食作物中玉米的氧气释放量所占比例最高为69.3%,单位耕地面积的氧气释放量平均为12.89 t·hm-2·a-1,总体呈逐年增加趋势;北京农田生态系统碳蓄积量总体也呈增加趋势,年递增幅度为2.8%,年平均碳蓄积量为105.82万吨,其中粮食作物的碳蓄积比例增加较为显著,且粮食作物年均碳蓄积量所占比例最大为80.4%,在粮食作物中玉米的碳蓄积比例最大为68.5%,单位耕地面积年均碳蓄积量为5.03 t·hm-2,且呈逐年增加的趋势,年递增8.3%。北京市农田生态系统的固碳、释氧的气体调节作用的生态功能不容忽视。
[Abstract]:The interannual changes of carbon sink and oxygen release function of farmland ecosystem in Beijing from 2004 to 2012 were studied. The results showed that the total oxygen release from farmland ecosystem in Beijing was increasing year by year, the highest in 2008, and the annual average oxygen release was two million seven hundred and nine thousand tons. The highest proportion of annual oxygen release from grain crops was 80.1 in farmland ecosystem, and the highest percentage of oxygen release from corn was 69.3% in grain crops. The average oxygen release per cultivated land area was 12.89 t 路hm-2 路a-1, which showed an increasing trend year by year. The carbon storage of Beijing farmland ecosystem also showed an increasing trend, the annual increase range is 2.8, the annual average carbon storage is one million fifty-eight thousand and two hundred tons, among which, the increase of grain crops carbon accumulation ratio is more significant. The percentage of annual carbon storage of grain crops was 80.4 and that of corn was 68.5%. The average annual carbon storage per unit cultivated land area was 5.03 t 路hm-2, which showed an increasing trend year by year, increasing by 8.3% per year. The carbon sequestration of Beijing farmland ecosystem. The ecological function of oxygen-releasing gas regulation should not be ignored.
【作者单位】：北京农学院园林学院;北京乡村景观规划设计工程技术研究中心;城乡生态环境北京实验室;北京农学院经济管理学院;
【基金】：“粮经作物产业技术体系北京市创新团队”建设专项资助(BFCIC-13) 北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20150503) 科研基地建设科技创新平台项目(PXM2015_014207_000010) 城乡生态环境北京实验室建设项目(PXM2015_014207_000014)
【分类号】：S181
【正文快照】： 2.北京乡村景观规划设计工程技术研究中心,北京102206;3.城乡生态环境北京实验室,北京100083;4.北京农学院经济管理学院,北京102206)1引言由温室效应导致的全球变暖已经成为全世界关注的焦点问题。农作物和所有绿色植物一样具有同样的功能,对减少温室效应以及人类的生存和发展

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