| 不同类型生物土壤结皮固氮活性及对环境因子的响应研究 |
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| 引用本文： | 苏延桂,李新荣,赵昕,李爱霞,陈应武.不同类型生物土壤结皮固氮活性及对环境因子的响应研究[J].地球科学进展,2011,26(3):332-338. |
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| 作者姓名： | 苏延桂 李新荣 赵昕 李爱霞 陈应武 |
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| 作者单位： | 苏延桂,Su Yangui(中国科学院干旱区生物地理与生物资源重点实验室,中国科学院新疆生态与地理研究所,新疆乌鲁木齐,830011;中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站,甘肃,兰州,730000);李新荣,赵昕,李爱霞,Li Xinrong,Zhao Xin,Li Aixia(中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站,甘肃,兰州,730000);陈应武,Chen Yingwu(河南科技大学林学院,河南,洛阳,471003) |
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| 基金项目： | 国家自然科学基金项目，国家自然科学基金项目，国家自然科学杰出青年基金项目 |
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| 摘 要： | 利用乙炔还原法对腾格里沙漠东南缘沙坡头地区3种生物土壤结皮(藻结皮、地衣结皮和苔藓结皮)的固氮活性及生物结皮固氮活性对模拟不同降雨量(1、3和5 mm)、温度(13、24和28℃)和光强(0、400和1000μmol/(m2·s))的响应进行研究.结果表明:不同类型生物结皮的固氮活性差异显著,依次为:藻结皮(16.6 ...
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| 关 键 词： | 生物土壤结皮 C2H4产量 结皮类型 固氮活性 乙炔还原法 |
The Nitrogenase Activity of Biological Soil Crusts and Their Responses to Environmental Factors |
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| Su Yangui,Li Xinrong,Zhao Xin,Li Aixia,Chen Yingwu.The Nitrogenase Activity of Biological Soil Crusts and Their Responses to Environmental Factors[J].Advance in Earth Sciences,2011,26(3):332-338. |
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| Authors: | Su Yangui Li Xinrong Zhao Xin Li Aixia Chen Yingwu |
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| Institution: | 1.Key Laboratory of Biogeography and Bioresources in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi830011, China;;
2.Shapotou Desert Research and Experiment Station, Cold and Arid Regions and Environmental and Engineering Research Institute, Chinese Academy of Sciences,Lanzhou730000,China;;
3.Forestry Colleague of Henan University of Science and Technology, Luoyang471003, China |
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| Abstract: | Acetylene reduction was employed to study the nitrogenase activity(NA) of three types of biological soil crusts(algal,moss and lichen crusts) and the responses of NA to precipitation(1,3 and 5 mm),light intensity(0,400 and 1 000 μmol/(m2·s)) and air temperature(13,24 and 28 ℃) were also investigated under the laboratory condition.Results showed that NA differed significantly among crusts,with highest value occurring for algal crusts(16.6 mmol/(m2·h)),followed by lichen(6.9 mmol/(m2·h)) and moss crusts(2.6 mmol/(m2·h)).Precipitation and temperature significantly affected the NA,while light intensity had no effect on NA.The 3 and 5 mm precipitations significantly activated NA compared with 1 mm precipitation.NA was profoundly enhanced under the air temperature of 24 ℃ compared with 13 ℃.Therefore,firstly,this study indicated that biological soil crusts have the capability of nitrogen fixation,especially the algal crusts,which contributed profoundly to the soil nitrogen input in the desert ecosystems;secondly,the precipitation and temperature are the regulating factors for NA. |
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| Keywords: | Biological soil crusts C2H4 production Crusts type Nitrogenase activity Acetylene reduction |
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