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[1]刘颖贺静雯李松阳余杭吴建召崔羽林勇明**王道杰李键.干热河谷优势灌木种类的根系结构及碳氮磷元素含量特征*[J].应用与环境生物学报,2020,26(01):1-13.[doi:10.19675/j.cnki.1006-687x.2019.04040]
 LIU Ying,HE Jingwen,et al.Root structure and elements (C, N, P) content characteristics of dominant shrub species in dry-hot valley *[J].Chinese Journal of Applied & Environmental Biology,2020,26(01):1-13.[doi:10.19675/j.cnki.1006-687x.2019.04040]
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干热河谷优势灌木种类的根系结构及碳氮磷元素含量特征*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年01期
页码:
1-13
栏目:
研究论文
出版日期:
2020-01-25

文章信息/Info

Title:
Root structure and elements (C, N, P) content characteristics of dominant shrub species in dry-hot valley *
作者:
刘颖1;?2贺静雯1;?2李松阳1;?2余杭1;?2吴建召1;?2崔羽1;?2林勇明1;?2**王道杰3李键1;?2
1福建农林大学林学院 福州 350002
2福建省高校森林生态系统过程与经营重点实验室 福州 350002
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;? LI Songyang1;?2;? YU Hang1;? 2;? WU Jianzhao1;? 2;? CUI Yu1;? 2;? LIN Yongming 1;? 2 **;? WANG Daojie3 & LI Jian1;? 2
1 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2 Key Laboratory for Forest Ecosystem Process and Management of Fujian province, Fuzhou 350002, China
3 Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
关键词:
干热河谷;?灌木;?根系结构;?碳氮磷含量;?化学计量比;?相关分析
Keywords:
dry-hot valley;? shrub;? root structure;? C;? N and P content;? stoichiometric ratio;? correlation analysis
DOI:
10.19675/j.cnki.1006-687x.2019.04040
摘要:
研究干热河谷优势灌木的根系特征,有助于了解植物根系的养分和水分吸收能力、固土作用及对恶劣环境的适应与生存策略,为干热河谷植被恢复和生态环境改善提供理论依据。选取马桑(Coriaria sinica)、坡柳(Dodonaea viscose )和苦刺(Sophora davidii)3种干热河谷优势灌木种类,对其根系的形态结构特征和碳(C)、氮(N)、磷(P)元素含量状况进行研究。研究结果表明,马桑、坡柳和苦刺的根长、根表面积、干质量以及部分径级比根长(SRL)和比表面积(SSA)无显着差异,马桑0-2 mm根系的比根长显着高于> 2 mm根系,表明其0-2 mm根的养分与水分吸收能力优于> 2mm的根;坡柳和苦刺0-1 mm根系的比根长均显着高于> 1 mm根系,表明其0-1 mm根的养分与水分吸收能力显着高于> 1 mm的根。苦刺根系的平均C、N、P含量显着高于马桑和坡柳,不同径级的N含量均显着高于马桑和坡柳,这与苦刺为豆科植物具有较强的固氮能力有关。根据N:P判断,苦刺根系受P的限制,马桑和坡柳根系受N的限制。3种灌木的比根长和比表面积与元素含量基本不存在显着相关性,原因在于比根长和比表面积随径级变化的趋势与根系元素含量的变化趋势不同,造成2者相关性不显着。综上所述,干热河谷3种灌木的根系形态结构特征具有一定的相似性,但元素C、N、P含量以苦刺最高,该结果有助于了解当地植物对土壤养分的利用效率和适应生存策略。(图3 表4 参51)
Abstract:
Studying the root characteristics of dominant shrubs in dry-hot valleys is helpful to understand the ability to absorb nutrients and moisture of plants, the soil-fixing effect of roots and the adaptation and survival strategies for harsh environments, and provide a theoretical basis for vegetation restoration and ecological environment improvement in dry-hot valleys. In this paper, three dominant shrub species in dry-hot valley, Coriaria sinica, Dodonaea viscose and Sophora davidii, were selected to explore the morphological and structural characteristics and element contents of the roots. The research results are as follows. There were no significant differences between the root length, root surface area, dry weight and specific root length (SRL) and specific surface area (SSA) at partial diameters of C. sinica, D. viscose and S. davidii. There was a significant difference between SRL of 0-2 mm root and SRL of > 2 mm root of C. sinica. It shows that the nutrient and water absorption capacity of 0-2 mm root is better than the root of > 2mm. There were significant differences between SRL of 0-1 mm root and SRL of > 1 mm root of D. viscose and S. davidii. It shows that the nutrient and water absorption capacity of 0-1 mm root is significantly higher than the root of > 1 mm. The average C, N, and P contents of S. davidii roots were significantly higher than those of C. sinica and D. viscose. The N contents of different diameter grades were significantly higher than that of C. sinica and D. viscose. These are related to the strong nitrogen fixation of S. davidii for legumes. According to N:P, the roots of S. davidii are restricted by P, and the roots of C. sinica and D. viscose are restricted by N. The SRL and SSA of the three shrubs were not significantly correlated with the elemental contents. The reason is that the trends of SRL and SSA change with diameter level were different from the change of elemental contents. In summary, the root morphological and structural characteristics of the three shrubs in dry-hot valley were similar, but the content of C, N and P is highest in S. davidii. This result helps to understand the local plant’s utilization efficiency of soil nutrients and survival strategies.

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 Zhang Xinbao,Chen Yude.STUDY ON VEGETATION REHABILITATION ON THE SLOPES OF THE ARID AND HOT VALLEYS IN YUANMOU, YUNNAN[J].Chinese Journal of Applied & Environmental Biology,1997,3(01):13.
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备注/Memo

备注/Memo:
收稿日期 Received: 2019-04-20 接受日期 Accepted: 2019-07-03
*国家自然科学基金项目(41790434)、福建农林大学杰出青年科研人才计划项目(xjq2017016)和福建农林大学科技创新专项基金项目(CXZX2016058,CXZX2017111)资助
**通讯作者 Corresponding author (E-mail: monkey1422@163.com)
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更新日期/Last Update: 2019-07-05