| 模拟降水减少对中亚热带杉木人工林土壤甲烷吸收的影响 |
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| 引用本文： | 王全成,陈匆琼,杨智杰,刘小飞,谢锦升,杨玉盛.模拟降水减少对中亚热带杉木人工林土壤甲烷吸收的影响[J].生态学报,2019,39(10):3517-3525. |
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| 作者姓名： | 王全成 陈匆琼 杨智杰 刘小飞 谢锦升 杨玉盛 |
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| 作者单位： | 福建师范大学湿润亚热带山地生态国家重点实验室培育基地;福建师范大学地理科学学院 |
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| 基金项目： | 国家重大科学研究项目（2014CB954003）；国家自然科学基金项目（31670623） |
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| 摘 要： | 森林土壤是大气中甲烷重要的汇,降水变化是影响森林土壤甲烷吸收速率(V_(CH_4))的重要因子。以中亚热带地区不同降水减少程度的杉木林土壤为研究对象,采用静态箱-气相色谱法来测定不同模拟降水减少处理样地的土壤甲烷吸收速率。结果表明:模拟降水减少后显著改变了土壤中的含水量,降水减少60%、降水减少20%和对照样地的年均土壤含水量分别为18.87%、23.89%和28.33%。杉木人工林土壤甲烷吸收速率在月变化上存在较大幅度的波动,其中土壤甲烷吸收速率在8月份达到一年中的最大值(对照75μg m~(-2) h~(-1)),2月份达到一年中的最小值(对照10.93μg m~(-2) h~(-1))。3种处理样地的土壤全年均为甲烷汇,与对照样地的甲烷年通量(2.48 kg hm~(-2) a~(-1))相比,降水减少60%和20%样地的甲烷年通量分别增加44%和19%。在对照样地中,土壤甲烷吸收速率与土壤含水量呈现负相关(P=0.001),与温度相关性不显著(P0.05);而模拟降水减少后,土壤甲烷吸收速率与土壤温度呈正相关关系(P=0.006和P=0.034),与土壤含水量相关性不显著(P0.05)。总之,模拟降水减少后不仅提高了杉木人工林土壤甲烷吸收的能力,同时也可能改变影响土壤甲烷吸收的环境因子;在模拟降水减少前土壤甲烷吸收速率与土壤水分相关性更为密切,而模拟降水减少后土壤甲烷吸收速率可能主要受土壤温度的影响。
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| 关 键 词： | 杉木人工林 土壤甲烷吸收速率 土壤温度 土壤含水量 |
| 收稿时间： | 2018/7/9 0:00:00 |
| 修稿时间： | 2019/1/2 0:00:00 |
Effects of precipitation exclusion on soil methane uptake under Cunninghamia lanceolate plantation in mid-subtropical China |
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| WANG Quancheng,CHEN Congqiong,YANG Zhijie,LIU Xiaofei,XIE Jinsheng and YANG Yusheng.Effects of precipitation exclusion on soil methane uptake under Cunninghamia lanceolate plantation in mid-subtropical China[J].Acta Ecologica Sinica,2019,39(10):3517-3525. |
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| Authors: | WANG Quancheng CHEN Congqiong YANG Zhijie LIU Xiaofei XIE Jinsheng and YANG Yusheng |
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| Institution: | State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China,State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China,State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China,State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China,State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China and State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou 350007, China;School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China |
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| Abstract: | |
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| Keywords: | Cunninghamia lanceolate plantation soil methane uptake rate soil temperature soil water content |
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