| 土壤氨氧化细菌对大气CO2浓度增高的响应 |
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| 引用本文： | 林先贵,胡君利,褚海燕,尹睿,苑学霞,张华勇,朱建国.土壤氨氧化细菌对大气CO2浓度增高的响应[J].生态与农村环境学报,2005,21(1):44-46. |
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| 作者姓名： | 林先贵 胡君利 褚海燕 尹睿 苑学霞 张华勇 朱建国 |
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| 作者单位： | 中国科学院,南京土壤研究所,江苏,南京,210008;中国科学院南京土壤研究所-香港浸会大学,土壤与环境联合开放实验室,江苏,南京,210008;中国科学院,南京土壤研究所,江苏,南京,210008;中国科学院南京土壤研究所-香港浸会大学,土壤与环境联合开放实验室,江苏,南京,210008;中国科学院,研究生院,北京,100039 |
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| 基金项目： | 国家自然科学基金面上项目(40271066);国家自然科学基金重点项目(40231003);中国科学院创新方向项目(KZCX2-408) |
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| 摘 要： | 利用FACE(free-air carbon dioxide enrichment,开放式空气CO2浓度增高)试验平台,研究大气CO2浓度增高对土壤氨氧化细菌的数量、优势菌群及其硝化活性的影响.结果表明,大气CO2浓度增高时,土壤氨氧化细菌的数量在常氮水平上趋于减少,而在高氮水平上与对照没有差异.大气CO2浓度增高对土壤氨氧化细菌的优势菌群也产生明显影响.CO2浓度增高条件下,亚硝化球菌(Nitrosococcus sp.)和亚硝化弧菌(Nitrosovibrio sp.)是优势菌属;而在对照条件下,亚硝化单胞菌(Nitrosomonas sp.)和亚硝化球菌(Nitrosococcus sp.)是优势菌属.另外,CO2浓度增高条件下优势菌株的硝化活性也有不同程度的减弱.
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| 关 键 词： | 大气CO2浓度增高 土壤 氨氧化细菌 优势菌属 硝化活性 |
| 文章编号： | 1001-5906(2005)01-0044-03 |
| 修稿时间： | 2004年7月30日 |
Response of soil ammonia-oxidizing bacteria to enriched atmospheric CO2 |
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| LIN Xian-gui.Response of soil ammonia-oxidizing bacteria to enriched atmospheric CO2[J].Journal of Ecology and Rural Environment,2005,21(1):44-46. |
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| Authors: | LIN Xian-gui |
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| Institution: | LIN Xian-gui~ |
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| Abstract: | A FACE system(free-air carbon dioxide enrichment)was used to investigate effects of elevated atmospheric CO_2 on soil ammonia-oxidizing bacterial population,dominant bacteria and their nitrification activities.It was found that the enrichment of atmospheric CO_2 reduced the population of ammonia-oxidizing bacteria in soil when N was in normal level,but had no difference when N was in high level.The elevation of atmospheric CO_2 also affected dominancy of ammonia-oxidizing bacteria with Nitrosococcus sp.and Nitrosovibrio sp. replacing Nitrosomonas sp. and Nitrosococcus sp.in the ambient soils.In addition,nitrification activities of the dominant genera were decreased to various extents under elevated CO_2. |
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| Keywords: | enriched atmospheric CO_2 soil ammonia-oxidizing bacteria dominant bacteria nitrification activity |
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