不同水分管理下稻田土壤CH4和N2O排放与微生物菌群的关系

摘要/Abstract

摘要： 采用MPN计数法对黑土(海伦)和草甸棕壤(沈阳)稻田生长季4种微生物菌群数量进行了测定,同时采用封闭式箱法对CH₄和N₂O通量进行观测,以深入了解稻田生物源温室气体排放的微生物学过程.两地试验田均采用长期淹灌与间歇灌溉两种不同水分管理.对实验结果多元回归分析,结果表明,海伦与沈阳两地稻田两种水分管理条件下CH₄通量季节变化与产甲烷菌数季节变化存在极显著正相关关系.沈阳稻田生长季CH₄通量季节变化与甲烷氧化菌数季节变化具有显著正相关性.间歇灌溉条件下黑土稻田N₂O通量与反硝化菌数呈显著性正相关关系.两种水分管理条件下沈阳稻田N₂O通量与硝化菌数具有显著正相关关系.间歇灌溉条件下沈阳稻田N₂O通量与反硝化菌数呈显著性正相关关系.

关键词: 产甲烷菌, 甲烷氧化菌, 硝化细菌, 反硝化细菌, CH₄, N₂O

Abstract: Methanogens,methanotrophs,nitrifiers and denitrifiers are the important microorganisms in the production and consumption of CH₄ and N₂O in soil. In order to understand the microbial processes related to the two greenhouse gases in paddy soil,the four bacteria groups in phaeozem (Hailun) and burozem (Shenyang) were surveyed during rice growth season by using MPN counting technique. The CH₄ and N₂O emissions were measured with closed chamber method. Two different water management regimes,i.e.,continual irrigation and intermittent irrigation,were used for the two paddy soils. The results of multiple regression analysis showed that there was a significantly positive correlation between CH₄ emission and methanogen population in both phaeozem and burozem under two water management regimes. In the soil of Shenyang,there was a significantly positive correlation between CH₄ emission and methanotroph population. The N₂O emission was significantly correlated to the denitrifier population in both phaeozem and burozem under intermittent irrigation,and in the soil of Shenyang,there was a significantly positive correlation between N₂O emission and nitrifier population under two water managements.

Key words: Methanogens, Methanotrophs, Nitrifiers, Denitrifiers, CH₄, N₂O

中图分类号:

S181

岳进, 黄国宏, 梁巍, 焦志华, 梁战备, 王琛瑞, 史奕. 不同水分管理下稻田土壤CH₄和N₂O排放与微生物菌群的关系[J]. 应用生态学报, 2003, (12): 2273-2277.

YUE Jin, HUANG Guohong, LIANG Wei, JIAO Zhihua, LIANG Zhanbei, WANG Chenrui, SHI Yi . Relationship between CH₄ and N₂O emissions and related microorganism populations in paddy soils under different water management regimes[J]. Chinese Journal of Applied Ecology, 2003, (12): 2273-2277.

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不同水分管理下稻田土壤CH₄和N₂O排放与微生物菌群的关系

Relationship between CH₄ and N₂O emissions and related microorganism populations in paddy soils under different water management regimes

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