| 模拟氮沉降对杉木幼苗细根化学计量学特征的影响 |
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| 引用本文： | 郭润泉,熊德成,宋涛涛,蔡瑛莹,陈廷廷,陈望远,郑欣,陈光水.模拟氮沉降对杉木幼苗细根化学计量学特征的影响[J].生态学报,2018,38(17):6101-6110. |
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| 作者姓名： | 郭润泉 熊德成 宋涛涛 蔡瑛莹 陈廷廷 陈望远 郑欣 陈光水 |
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| 作者单位： | 福建师范大学地理科学学院;湿润亚热带山地生态国家重点实验室培育基地 |
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| 基金项目： | 国家自然科学基金优秀青年基金项目（31422012）；973前期专项课题（2014CB460602）；福建省杰出青年基金项目滚动资助项目（2014J07005） |
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| 摘 要： | 为了揭示全球氮(N)沉降对杉木人工林细根碳(C)、N、磷(P)元素组成的影响,在福建三明陈大国有林场开展杉木(Cunninghamia lanceolata)幼苗模拟N沉降试验,设置了对照(CK)、低N(LN,40 kg N hm~(-2)a~(-1))、高N(HN,80 kg N hm~(-2)a~(-1))3个处理,每个处理5个重复。采用内生长环法通过2年4次取样探讨N沉降对细根C、N、P化学计量学的影响。结果显示:(1) N添加在2015年降低细根C浓度,此后低N处理无影响,高N添加在2016年增加了细根C浓度;高N添加提高了细根(特别是0—1 mm细根) N浓度,但低N添加则无显著影响,甚至在2016年7月显著降低细根N浓度; N添加在2015年对细根P浓度无显著影响,但在2016年导致细根(特别是0—1 mm细根) P浓度降低。(2)低N添加在2016年显著提高细根的C∶N比,而高N添加则在2015年1月显著降低细根的C∶N比;低N添加对细根N∶P比没有显著影响,而高N添加则在大部分取样时间里显著增加了细根N∶P比。(3)不同处理细根C浓度、C∶N比均随着时间的增加呈增加趋势,而细根N浓度和N∶P比呈降低趋势。本研究表明,N添加对杉木细根化学计量学特征的影响因不同N添加水平而异,并受苗木生长的稀释效应所调节。
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| 关 键 词： | 氮沉降 细根 碳、氮、磷 碳氮比 氮磷比 |
| 收稿时间： | 2017/9/19 0:00:00 |
| 修稿时间： | 2018/4/1 0:00:00 |
Effects of simulated nitrogen deposition on stoichiometry of fine roots of Chinese fir (Cunninghamia lanceolata) seedlings |
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| GUO Runquan,XIONG Decheng,SONG Taotao,CAI Yingying,CHEN Tingting,CHEN Wangyuan,ZHENG Xin and CHEN Guangshui.Effects of simulated nitrogen deposition on stoichiometry of fine roots of Chinese fir (Cunninghamia lanceolata) seedlings[J].Acta Ecologica Sinica,2018,38(17):6101-6110. |
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| Authors: | GUO Runquan XIONG Decheng SONG Taotao CAI Yingying CHEN Tingting CHEN Wangyuan ZHENG Xin and CHEN Guangshui |
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| Institution: | School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China,School of Geographical Science, Fujian Normal University, Fuzhou 350007, China and School of Geographical Science, Fujian Normal University, Fuzhou 350007, China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China |
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| Abstract: | |
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| Keywords: | nitrogen deposition fine root carbon nitrogen phosphorus carbon nitrogen ratio nitrogen phosphorus ratio |
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