[1]刘 颖,等.干热河谷优势灌木细根、粗根与叶片养分(C、N、P)含量及化学计量比[J].山地学报,2020,(5):668-678.[doi:10.16089/j.cnki.1008-2786.000544]
 LIU Ying,HE Jingwen,et al.Nutrients(C, N, P)Contents and Stoichiometric Ratios of Fine Root,Coarse Root and Leaf in Dominant Shrubs in Dry-hot Valley[J].Mountain Research,2020,(5):668-678.[doi:10.16089/j.cnki.1008-2786.000544]
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干热河谷优势灌木细根、粗根与叶片养分(C、N、P)含量及化学计量比
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2020年第5期
页码:
668-678
栏目:
山地环境
出版日期:
2020-11-10

文章信息/Info

Title:
Nutrients(C, N, P)Contents and Stoichiometric Ratios of Fine Root,Coarse Root and Leaf in Dominant Shrubs in Dry-hot Valley
文章编号:
1008-2786-(2020)5-668-11
作者:
刘 颖1 2贺静雯1 2余 杭1 2林勇明1 2*王道杰3
1.福建农林大学 林学院,福州 350002; 2.中国科学院山地灾害与地表过程重点实验室,成都 610041; 3.中国科学院、水利部成都山地灾害与环境研究所,成都 610041
Author(s):
LIU Ying1 2 HE Jingwen1 2 YU Hang1 2 LIN Yongming 1 2* WANG Daojie3
1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
关键词:
干热河谷 灌木 根系 叶片 C、N、P含量 化学计量比 蒋家沟流域
分类号:
Q948
DOI:
10.16089/j.cnki.1008-2786.000544
文献标志码:
A
摘要:
分析生态脆弱区植物根系与叶片的养分含量特征,可认识植物生长发育的养分限制状况以及根系与叶片间的协同作用,并确定植物在恶劣环境条件下的适应性及生存策略。本文以典型生态脆弱区——干热河谷常见灌木植物马桑、坡柳和苦刺为研究对象,对其根系和叶片养分含量、化学计量比特征以及相互之间的关系进行研究。结果表明,马桑、坡柳粗根C含量显著高于细根(P<0.05),马桑细根P含量显著高于粗根(P<0.05)。细根、粗根养分含量的不同表明细根与粗根的生理生态功能具有较大差异。马桑和坡柳粗根的C:N、C:P均显著高于细根(P<0.05),坡柳细根和粗根的C:N均显著高于马桑、苦刺(P<0.05)。根据N:P判断,马桑细根(10.61)、粗根(11.42)生长均受到N的限制; 坡柳细根(7.87)、粗根(6.00)生长受N的限制更为严重; 苦刺细根(18.43)、粗根(16.34)生长均受P的限制。细根、粗根养分受限一致,表明细根和粗根的养分分配具出一定的协同性。除苦刺C外,灌木C、N、P含量均表现为叶片显著高于细根、粗根(P<0.05),表明叶片具有更高的养分含量。叶片N、P含量表现为苦刺显著高于马桑、坡柳(P<0.05),说明苦刺养分吸收能力更强。三种灌木N:P均表现为叶片>根系(P<0.05),马桑、坡柳、苦刺叶片N:P分别为40.05、35.34、45.26,三种灌木叶片的生长均受到P的限制。细根、粗根C含量与叶片无显著相关性,说明根系与叶片的C来源不同。根系N、P含量与叶片均呈显著正相关,说明叶片N、P主要来源于根系吸收的土壤养分,叶片与细根N、P相关性更强。上述结果表明植物体在生长代谢过程中具有整体性,植物的地上与地下营养器官在养分的分配过程中具有协同作用,细根与地上部分的协同作用比粗根强。

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备注/Memo

备注/Memo:
收稿日期(Received date):2019-05-13; 改回日期(Accepted date): 2020-07-04
基金项目(Foundation item):国家自然科学基金(41790434); 福建农林大学杰出青年科研人才计划项目(xjq2017016); 中国科学院山地灾害与地表过程重点实验室开放基金(2019)。[ National Natural Science Foundation of China(41790434); Outstanding Young Scientific Research Project of Fujian Agriculture and Forestry University(xjq2017016); Research Fund of Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences(2019)]
作者简介(Biography):刘颖(1995-),女,山东泰安人,硕士生,主要研究方向:自然资源管理。[LIU Ying(1995-), female, born in Tai'an, Shandong province, M. Sc. candidate, research on natural resource management ] E-mail: liuying052820@163.com
*通讯作者(Corresponding author):林勇明(1982-),男,福建福安人,博士,教授,主要研究方向:恢复生态学。[LIN Yongming(1982-), male, born in Fu'an, Fujian province, ph.D., professor, research on restoration ecology ] E-mail: monkey1422@163.com
更新日期/Last Update: 2020-09-30