地学前缘 ›› 2011, Vol. 18 ›› Issue (6): 79-84.

• 论文 • 上一篇    下一篇

水田和旱地土壤氧化甲烷的温度响应

江丽珍, 冯海艳, 蒋宏忱, 杨忠芳, 王诚煜, 李淼, 夏学齐, 张彩香   

  1. 1. 中国地质大学（北京） 地球科学与资源学院， 北京 100083
    2. 中国地质大学（武汉） 生物地质与环境地质国家重点实验室， 湖北 武汉 430074
  • 收稿日期:2011-11-01 修回日期:2011-11-05 出版日期:2011-11-25 发布日期:2011-12-05
  • 作者简介:江丽珍（1987—），女，硕士研究生，地球化学专业。E-mail：316205593@qq.com
  • 基金资助:

    国土资源部公益性行业科研专项(20091102001)；中央高校基本科研业务费专项（2010ZY15）

Effect of temperature on methane oxidation in rice field and irrigative agriculture soil.

  1. 1. School of Earth Sciences and Resources，China University of Geosciences(Beijing)，Beijing 100083，China
    2. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences(Wuhan)，Wuhan 430074，China
  • Received:2011-11-01 Revised:2011-11-05 Online:2011-11-25 Published:2011-12-05

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摘要：

为了探讨温度对农耕区土壤氧化CH4的影响，文中分别采用2种旱地（吉林暗棕壤和河北潮土）和2种水田土壤（江西水稻土和安徽水稻土）样品进行了4个温度下（5、15、25和35 ℃）氧化高浓度CH4的模拟实验研究。结果表明，4种土壤氧化高浓度CH4的最佳温度为25~35 ℃，除江西水稻土外，其余土壤在5和15 ℃没有表现出氧化高浓度CH4的能力。吉林暗棕壤、安徽水稻土在25和35 ℃下氧化高浓度CH4能力均相似，最大平均氧化速率分别为4.42和5.60 μg·g-1·d-1。河北潮土35 ℃下的高浓度CH4平均氧化速率是25 ℃的2倍。江西水稻土在4个温度下均能氧化高浓度CH4，且氧化速率随温度升高而升高，其中35 ℃下的高浓度CH4平均氧化速率最大，是5 ℃下的3倍。土壤在25~35 ℃下氧化高浓度CH4最大平均速率大小顺序为江西水稻土>河北潮土>安徽水稻土>吉林暗棕壤。通过本实验得出，温度是影响土壤氧化CH4的重要因素，高温（25~35 ℃）较低温（5~15 ℃）适合土壤CH4氧化；旱地与水田都拥有较强的氧化CH4的能力。本研究将为农耕区土壤碳库研究提供重要的理论依据。

关键词: 甲烷, 甲烷氧化, 温度

Abstract:

Temperature affects methane oxidation in soils. We studied CH4 consumption in agricultural soils including dark brown earth (Jilin)，fluvoaquic soil (Hebei)，and paddy soils (Anhui and Jiangxi) that were incubated at 5， 15， 25 and 35 ℃ for up to 44 days. All of the soils except paddy soils (Jiangxi) showed that the suitable temperature for CH4 consumption was 2535 ℃，but no activity at 5 ℃ and 15 ℃. Both dark brown soil (Jilin) and paddy soil (Anhui) had similar ability at 25 ℃ and 35 ℃，the maximum average rates of CH4 oxidation were 4.42 μg·g-1·d-1and 5.60 μg·g-1·d-1. The average rate of CH4 oxidation of fluvoaquic soil (Hebei) at 25 ℃ was twice as big as the rate at 35 ℃. Paddy soil (Jiangxi) could consume CH4 at any temperature. The average rates of CH4 oxidation increase with rising temperature and the rate at 35 ℃ was 3 times as the rate at 5 ℃. The maximum rate of CH4 oxidation at 2535 ℃ follows this sequence：paddy soil (Jiangxi)>fluvoaquic soil (Hebei)>paddy soil (Anhui)>dark brown earth (Jilin). We concluded that temperature can be an important factor affecting the CH4 consumption in agricultural soils and the temperature 2535 ℃ would be suitable for CH4 oxidation than 515 ℃. Both dry farm and rice field had significant ability of CH4 consumption. This study will provide an important evidence for agricultural soil carbon pool research.

Key words: methane, methane oxidation, temperature

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