长白山北坡不同土壤N2O和CH4排放的初步研究

应用生态学报 ›› 1995, Vol. 6 ›› Issue (4): 373-377.

长白山北坡不同土壤N₂O和CH₄排放的初步研究

徐慧, 陈冠雄, 马成新

中国科学院沈阳应用生态研究所陆地生态系统痕量物质生态过程开放实验室, 沈阳 110015

收稿日期:1995-02-28 修回日期:1995-05-18 出版日期:1995-10-25 发布日期:1995-10-25
基金资助:
国家“八五”科技攻关项目;中国科学院陆地生态系统痕量物质生态过程开放实验室基金

A preliminary study on N₂O and CH₄ emissions from differentsoils on northern slope of Changbai Mountain

Xu Hui, Chen Guanxiong, Ma Chengxin

Laboratory of Ecological Prooess of Trace Substance in Terrestrial Ecosystem, Institute of Applied Ecology, Academia Sinica, Shenyang 110015

Received:1995-02-28 Revised:1995-05-18 Online:1995-10-25 Published:1995-10-25

摘要/Abstract

摘要： 用箱法技术原位测定了长白山北坡不同土壤(苔原土、生草森林土、棕色针叶林土和暗棕色森林土)6-8月间的N₂O和CH₄排放。结果表明,这些土壤既是N₂O的源,又同时是CH₄的汇。N₂O通量变化于6.17-12.33μg·m^-2·h^-3之间(平均9.37μg·m^-2·h^-1),CH₄通量为-85.63—7.58μg·m^-2·h^-1(平均-41.45μg·m^-3·h^-1),并观察到在N₂O排放和CH₄吸收之间有着相互消长关系。实验室培养实验表明,最大反硝化作用活性存在于土壤上层(0-6cm);不同土壤的反硝化作用活性明显不同。山地暗棕色森林土的CH₄吸收作用也主要发生在土壤的上层(0-12cm).

关键词: 长白山北坡, N₂O, CH₄, 排放, 6-磷酸葡萄糖脱氢酶, 丙酮酸激酶, 核桃, 脂肪, 乙酰辅酶A羧化酶

Abstract: The fluxes of N₂O and CH₄ from tundra soil, soddy forest soil, brown coniferous forest soil and dark brown forest soil on northern slope of Changbai Mountain are measured in situ by chamber technique from June and August, 1994.The results show that all of the soils studied are the source of N₂O, and the sink of CH₄.The N₂O flux is in the range of 6.17 and 12.33 μg·m^-2·h^-1, while the CH₄ flux is between -85.63 and -7.58μg·m^-2·h^-1.There is a trade-off between N₂O emission and CH₄ uptake.Laboratory experiments show that upper soil layer (0-6cm) has the highest denitrification activity, which has a significant difference among different soils.The uptake of CH₄ by dark brown forest soil mainly occurs in upper soil layer (0-12cm).

Key words: Changbai Mountain, N₂O, CH₄, Emission, Pyruvate Kinase, G6PDH, walnut, fat, ACCase

徐慧, 陈冠雄, 马成新. 长白山北坡不同土壤N₂O和CH₄排放的初步研究[J]. 应用生态学报, 1995, 6(4): 373-377.

Xu Hui, Chen Guanxiong, Ma Chengxin . A preliminary study on N₂O and CH₄ emissions from differentsoils on northern slope of Changbai Mountain[J]. Chinese Journal of Applied Ecology, 1995, 6(4): 373-377.

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长白山北坡不同土壤N₂O和CH₄排放的初步研究

A preliminary study on N₂O and CH₄ emissions from differentsoils on northern slope of Changbai Mountain

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