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[1]陈轶群 王文娟,黄荣银,罗慧莹,等.热带次生林两种林下植物叶片生理特性对氮磷添加的响应[J].应用与环境生物学报,2019,25(03):626-633.[doi:10.19675/j.cnki.1006-687x.201809027]
　CHEN Yiqun,WANG Wenjuan,HUANG Rongyin,et al.Response of foliar physiological characteristic within two understory plant species to chronic nitrogen and phosphorus addition in a secondary tropical forest[J].Chinese Journal of Applied & Environmental Biology,2019,25(03):626-633.[doi:10.19675/j.cnki.1006-687x.201809027]
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热带次生林两种林下植物叶片生理特性对氮磷添加的响应
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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03期
页码:
626-633
栏目:
研究论文
出版日期:
2019-06-25

文章信息/Info

Title:
Response of foliar physiological characteristic within two understory plant species to chronic nitrogen and phosphorus addition in a secondary tropical forest
作者:
陈轶群 王文娟; 黄荣银; 罗慧莹; 李应文; 李泳兴; 赵倩; 莫其锋
1华南农业大学林学与风景园林学院 广州 510642 2中国科学院华南植物园，中国科学院退化生态系统植被恢复与管理重点实验室 广州 510650 3中国科学院小良热带海岸带生态系统定位研究站 茂名 525029
Author(s):
CHEN Yiqun1;  WANG Wenjuan2;  HUANG Rongyin1;  LUO Huiying1;  LI Yingwen2;  3;  LI Yongxing2;  3;  ZHAO Qian1 & MO Qifeng1;  2;  3*
1 College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China 2 Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China 3 Xiaoliang Research Station for Tropical Coastal Ecosystems, Chinese Academy of Science, Maoming 525029, China
关键词:
华南; 热带森林; 氮磷含量; 功能属性; 磷限制
Keywords:
South China;  tropical forest;  N&P concentration;  functional trait;  P limitation
分类号:
Q718.5
DOI:
10.19675/j.cnki.1006-687x.201809027
摘要:
为探究热带次生林林下植物叶片对长期氮（N）、磷（P）添加的响应，阐明热带森林植物对土壤低磷环境适应的生理生态机制，基于华南热带次生林长达9年的氮、磷添加实验，测定两种分布较广的林下乡土树种大青（Clerodendrum cyrtophyllum）和紫玉盘（Uvaria microcarpa）的叶片基本属性、叶绿素含量及氮磷元素含量等指标. 结果显示：（1）两种植物叶片的基本属性及光合色素存在显著的种间差异（P < 0.05）；氮和磷添加提高了大青叶片的比叶面积（35%-38%），对两个树种叶片的叶长、叶宽、叶面积等无显著影响；（2）氮添加显著影响两种植物叶片叶绿素a和总叶绿素含量（P = 0.036和P = 0.043），而磷添加对光合色素含量无显著影响；（3）对照处理下，大青和紫玉盘叶片的N:P分别为28.71与21.75，大于16，表明两个树种仍受到较强的磷限制；磷添加显著提高了两种植物叶片的磷含量，并降低N:P值；（4）相关性分析表明叶片基本属性、光合色素与氮磷元素含量三者之间的相关性关系较弱. 综上，热带森林植物叶片氮和磷元素含量对氮磷添加的响应较敏感，叶绿素a和总叶绿素对氮添加的响应较敏感，而其他属性对氮磷添加的响应较小；因此，在热带森林土壤磷长期缺乏的情况下，植物叶片的生理功能对环境变化具有较好的适应性，其蕴含的生物学机制仍需要进一步的探讨. （图3 表2 参31）
Abstract:
The goal of this study was to investigate the response and adaptation of plant leaves to long-term N and P addition, clarifying the physiological and ecological mechanisms of tropical forest plants to lower soil P availability in southern China. Based on an N and P addition experiment in the secondary tropical forest of southern China, the foliar traits, photosynthetic pigment, and N and P concentrations of two widely distributed tree species, Clerodendrum cyrtophyllum and Uvaria microcarpa were measured. The results obtained were as follows: 1) Inter-species differences were noted in foliar trait, photosynthetic pigment, and N and P concentrations (P < 0.05)—N and P addition increased the specific leaf area (SLA) of C. cyrtophyllum (35%–38%), whereas there was no significant effect on leaf length, width, or area for the two species; 2) N addition significantly influenced the chl a and chl (a + b) concentrations (P = 0.036 and P = 0.043, respectively), whereas P addition had no significant effects on photosynthetic pigment levels; 3) In the CK treatment, the N:P ratios of C. cyrtophyllum and U. microcarpa were 28.71 and 21.75, respectively, and both were higher than 16, indicating that the two tree species were strongly limited by P availability—P addition significantly increased foliar P concentrations and decreased N:P ratios of the two species; 4) Relatively weaker correlations were noted among foliar traits, photosynthetic pigment, and N and P concentrations. Thus, the foliar N and P concentrations were sensitive to N and P addition, and chl a and chl (a + b) were also sensitive to N addition, whereas other foliar traits were slowly responsive to N and P addition in this tropical forest. With the long-term lower soil availability, tropical forest plant leaves are well adaptive to environmental change, although the underlying biological mechanism is yet to be elucidated.

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相似文献/References:

[1]莫其锋,陈瑶,王法明,等.华南热带森林两种林下植物氮磷比对氮磷添加的响应[J].应用与环境生物学报,2015,21(05):919.[doi:10.3724/SP.J.1145.2015.03014]
　MO Qifeng,CHEN Yao,WANG Faming,et al.Nitrogen to phosphorus ratios of two understory plant species in response to nitrogen and phosphorus addition in tropical forest of southern China[J].Chinese Journal of Applied & Environmental Biology,2015,21(03):919.[doi:10.3724/SP.J.1145.2015.03014]

更新日期/Last Update: 2019-06-25