文章摘要
陈秋会,王磊,席运官,田伟,金淑,张弛,李妍,肖兴基.太湖地区有机与常规种植方式下稻麦轮作农田温室气体短期排放特征[J].农业环境科学学报,2019,38(11):2642-2649.
太湖地区有机与常规种植方式下稻麦轮作农田温室气体短期排放特征
Short-term greenhouse gas emissions from organic and conventional rice-wheat rotation cropping systems in Taihu Lake region, China
投稿时间:2019-06-05  
DOI:10.11654/jaes.2019-0635
中文关键词: 稻麦轮作  有机种植  温室气体  增温潜势  排放强度
英文关键词: rice-wheat rotation  organic cropping  greenhouse gas  global warming potential  emission intensity
基金项目:环保公益行业科研专项(201309036);云南省环保厅项目(YNZDZB[2017]002)
作者单位E-mail
陈秋会 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
王磊 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
席运官 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
xygofrcc@126.com 
田伟 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
金淑 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
张弛 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
李妍 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
肖兴基 生态环境部南京环境科学研究所, 南京 210042
生态环境部有机食品发展中心, 南京 210042 
 
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中文摘要:
      为探明有机种植模式对农田温室气体排放的影响,以太湖地区有机与常规种植模式下稻麦轮作农田为研究对象,采用静态箱-气相色谱法监测农田温室气体(CO2、CH4和N2O)排放的动态变化特征,并运用温室气体增温潜势(GWP)和排放强度(GHGI)进行温室效应估算。结果表明:在稻麦轮作季,有机与常规种植模式下温室气体排放通量整体动态变化趋势基本一致。在稻季,有机种植土壤CH4排放总量为195.56 kg·hm-2,显著高于常规种植(119.77 kg·hm-2),而CO2和N2O排放总量与常规种植无显著差异;在麦季,有机种植土壤CO2、N2O和CH4排放总量分别为12 554.92、1.44 kg·hm-2和7.02 kg·hm-2,常规种植土壤分别为8 096.61、2.67 kg·hm-2和6.74 kg·hm-2。稻季有机种植土壤温室气体GWP和GHGI显著高于常规种植,而在麦季常规种植较高。在整个稻麦轮作季,有机种植模式下温室气体GWP和GHGI分别为6 501.69 kg CO2-eq·hm-2和0.44 kg·kg-1,显著高于常规种植模式(4 745.38 kg CO2-eq·hm-2和0.37 kg·kg-1)。有机种植模式在稻季温室气体减排方面无明显优势,但是有利于麦季农田土壤温室气体的减排。
英文摘要:
      To evaluate the impact of organic cropping system on global warming, a field experiment on greenhouse gas(GHG) emissions from organic and conventional rice-wheat rotation cropping systems was conducted in Taihu Lake region. Greenhouse gases CO2, CH4, and N2O emission fluxes were measured using the static chamber-gas chromatograph method. Greenhouse warming potential(GWP) and greenhouse gas intensity(GHGI) were also used to analyze their warming effects. The results showed that the character of CO2, CH4, and N2O emissions flux dynamics were almost the same for organic and conventional rice-wheat rotation systems. The amount of CH4 emission from organic rice paddy field was 195.56 kg·hm-2, significantly greater than conventional field(119.77 kg·hm-2), whereas no significant differences were observed for CO2 and N2O emissions. Further, CO2, N2O, and CH4 emissions were 8 096.61, 2.67, and 6.74 kg·hm-2, respectively, from conventional wheat field and 12 554.92, 1.44, and 7.02 kg·hm-2 respectively from organic field. GWP and GHGI of organic field in rice season were significantly higher than those of conventional field, but contrarily in wheat season. GWP and GHGI of organic rice-wheat rotation field were 6 501.69 kg CO2-eq·hm-2 and 0.44 kg·kg-1 respectively, significantly higher than those from convention field(4 745.38 kg CO2-eq·hm-2 and 0.37 kg·kg-1 respectively). The results suggest that organic cropping system may not be an effective way to reduce greenhouse gas emissions in rice paddy ecosystem, but is effective in mitigating greenhouse gas emissions in wheat fields.
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