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应用生态学报 ›› 2012, Vol. 23 ›› Issue (03): 739-744.

• 研究论文 • 上一篇    下一篇

南京市郊区集约化大棚蔬菜地N2O的排放

贾俊香1,2,张〓曼1,熊正琴1**,李〓叶
1   

  1. 1南京农业大学资源与环境科学学院/江苏省低碳农业与温室气体减排重点实验室, 南京 210095; 2山西农业大学资源与环境学院, 山西太谷 030801
  • 出版日期:2012-03-18 发布日期:2012-03-18

N2O emission from an intensively managed greenhouse vegetable field in Nanjing suburb, Jiangsu Province of East China.

JIA Jun-xiang1,2, ZHANG Man1, XIONG Zheng-qin1, LI Ye1   

  1. 1Jiangsu Province Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China; 2College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, Shanxi, China
  • Online:2012-03-18 Published:2012-03-18

摘要: 采用静态暗箱-气相色谱法,研究了南京市郊区集约化生产管理下,芹菜-空心菜-小白菜-苋菜轮作菜地与休闲裸地的N2O排放通量的动态变化,及其与土壤温度、湿度以及NO3--N和NH4+-N含量的关系.结果表明: 轮作菜地的N2O累积排放量达1372 kg N·hm-2,显著大于休闲裸地(29.2 kg N·hm-2);轮作菜地生态系统N2O-N的排放系数高达46%.4种蔬菜地中,空心菜地对轮作菜地的周年累积排放量贡献最大,为53.5%,小白菜地次之,为31.9%,芹菜地和苋菜地最小,分别为4.5%和4.8%.轮作菜地的N2O排放通量与土壤温度呈显著正相关,Q10为2.80;土壤湿度以及NO3--N和NH4+-N含量与轮作菜地的N2O排放通量之间的相关性不显著.

关键词: 蔬菜地, N2O, 排放系数, Q10

Abstract: By using static opaque chamber and gas chromatography, this paper studied the dynamic changes of N2O fluxes and their relationships with soil temperature, soil moisture content, and soil nitrate and ammonium contents in an intensively managed greenhouse celery-
Tung choy-Bok choy-amaranth rotation field and in a bare fallow land in Nanjing suburb. The cumulative N2O emission from the rotation vegetable field was as high as 137.2 kg N·hm-2, being significantly higher than that from the bare fallow land (29.2 kg N·hm-2), and the N2O-N emission factor of the rotation vegetable field ecosystem was up to 4.6%. In the rotation field, the planting of Tung choy had the greatest contribution to the annual cumulative N2O emission, occupying 53.5% of the total, followed by the planting of Bok choy (31.9%), celery field (4.5%), and amaranth (4.8%). The N2O flux of the rotation field had significant positive correlation with soil temperature, the Q10 being 2.80, but no significant correlations with soil moisture content and soil nitrate and ammonium contents.

Key words: vegetable field, N2O, emission factor, Q10