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[1]张晓龙 周继华 来利明 姜联合 郑元润** 史利江.黑河下游绿洲—过渡带—戈壁荒漠群落优势种叶片性状和生态化学计量特征*[J].应用与环境生物学报,2019,25(06):1-9.[doi:10.19675/j.cnki.1006-687x.2019.04013]
 ZHANG Xiaolong,ZHOU Jihua,LAI Liming,et al.Leaf traits and ecological stoichiometry of desert dominant species across Oasis-Ecotone-Gobi in the lower reaches of Heihe River, China*[J].Chinese Journal of Applied & Environmental Biology,2019,25(06):1-9.[doi:10.19675/j.cnki.1006-687x.2019.04013]
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黑河下游绿洲—过渡带—戈壁荒漠群落优势种叶片性状和生态化学计量特征*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年06期
页码:
1-9
栏目:
研究论文
出版日期:
2019-12-30

文章信息/Info

Title:
Leaf traits and ecological stoichiometry of desert dominant species across Oasis-Ecotone-Gobi in the lower reaches of Heihe River, China*
作者:
张晓龙1;?2 周继华2?来利明2 姜联合2 郑元润2** 史利江1
1山西财经大学资源环境学院,地表过程与生态环境研究所 太原 030006
2中国科学院植物研究所 北京 100093
Author(s):
ZHANG Xiaolong1;?2;? ZHOU Jihua2;? LAI Liming2;? Jiang Lianhe2;? ZHENG Yuanrun2** & SHI Lijiang1
1 School of Resources and Environment, Institute of Surface Processes and Ecological Environment, Shanxi University of Finance and Economics, Taiyuan 030006, China
2 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
关键词:
不同生境;?叶片性状;?生态化学计量特征;?适应策略;?黑河下游
Keywords:
different habitats;? leaf traits;? ecological stoichiometry;? adaptation strategies;? lower reaches of Heihe River
DOI:
10.19675/j.cnki.1006-687x.2019.04013
摘要:
植物性状是植物与环境共同作用的结果,研究不同生境条件下植物叶片性状和生态化学计量特征,有助于揭示植物对环境变化的响应及生态适应策略。以黑河下游河岸绿洲、绿洲—戈壁过渡带和戈壁荒漠群落优势种为研究对象,分析荒漠优势种在生长旺季叶片干物质含量、比叶面积以及碳、氮和磷的生态化学计量特征。结果显示:不同生境条件下叶片干物质含量和比叶面积均值分别为0.30±0.01和31.19±1.75 cm2/g;叶片C、N、P、C:N、C:P和N:P均值分别为316.51±20.04 mg/g、16.63±1.00 mg/g、1.10±0.18 mg/g、19.77±1.31、434.64±45.88和22.07±2.06;与区域、全国以及全球尺度相比,黑河下游荒漠优势种总体表现出较低的叶片C含量和比叶面积,较高的C:P和N:P。在不同生境条件下,叶片性状和化学计量特征存在显着差异性,河岸绿洲和绿洲-戈壁过渡带荒漠优势种叶片N:P大于16,表明河岸绿洲和过渡带荒漠优势种可能倾向于受P元素控制,具有保守性特点;而戈壁荒漠优势种叶片N:P小于14,表明戈壁荒漠优势种可能倾向于受N元素控制,具有较强的适应能力。上述研究表明,在生长旺季,N和P元素是黑河下游荒漠植物生长的限制性营养元素,与戈壁荒漠地区相比,河岸绿洲和过渡带可能受到P限制作用更为强烈,可为荒漠绿洲和戈壁荒漠植被恢复和管理提供科学依据。(图1表3参44)
Abstract:
Plant traits are the consequences of the interaction between plant and environment, and then the study on the leaf traits and ecological stoichiometry of plants in different habitats can be conducive to reveal how plant respond to and adapt to environmental changes. In the lower reaches of Heihe river, desert community dominant species distributed in riparian oasis, oasis-Gobi ecotone and Gobi desert, were selected, and the leaf dry matter content, specific leaf area, leaf C, N, P ecological stoichiometry of the desert dominant species in different habitats in the growing season were investigated. The results showed that the average leaf dry matter content and specific leaf area of desert dominant species were 0.30±0.01, 31.19±1.75 cm2/g, respectively. The average leaf carbon (C), leaf nitrogen (N), leaf phosphorus (P), leaf C/N, leaf N/P and leaf C/P were 316.25±20.04 mg/g, 16.63±1.00 mg/g, 1.10±0.18 mg/g, 19.77±1.31, 434.64±45.88 and 22.07±2.06, respectively. Compared to the regional, national and global scales, the desert dominant species in the lower reaches of the Heihe River were characterized by lower leaf C and SLA, but higher C:P and N:P. There were significant differences in leaf traits and leaf stoichiometric traits among different habitats, and the Leaf N:P of dominant desert species in riparian oasis and oasis-Gobi ecotone were greater than 16, indicating that plants might be more limited by P and are more conservative, but the Leaf N:P of dominant desert species in Gobi desert was less than 14, indicating that plants might be more limited by N and have the strong adaptability. Our observations indicate that N and P were the limiting nutrients for desert plant growth in the growing season, compared with Gobi desert area in the lower reaches of Heihe River, the dominant desert species of riparian oasis and oasis-Gobi ecotone may be more strongly affected by phosphorus limitation, which provide some scientific basis for vegetation restoration and sustainable management in desert oasis and Gobi Desert area.

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[1]王丽华,高景,王金牛,等.高山草地长花马先蒿的性状和生物量分配对坡向的适应[J].应用与环境生物学报,2017,23(04):648.[doi:10.3724/SP.J.1145.2016.08026]
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备注/Memo

备注/Memo:
收稿日期 Received: 2019-04-07 接受日期 Accepted: 2019-04-22
*国家自然科学基金项目(91425301)和山西财经大学“人才引进项目”(Z18209)资助
**通讯作者 Corresponding author (E-mail: zhengyr@ibcas.ac.cn)
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更新日期/Last Update: 2019-04-26