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[1]朱亮,顾国军,徐振锋,等.北亚热带常绿阔叶林乔灌草物种的碳氮磷生态化学计量比[J].应用与环境生物学报,2019,25(06):1277-1287.[doi:10.19675/j.cnki.1006-687x.2019.02014]
 ZHU Liang,GU Guojun,XU Zhenfeng,et al.Ecological stoichiometric ratio of carbon, nitrogen, and phosphorus in tree, shrub, and herb species in a subtropical evergreen broad-leaved forest[J].Chinese Journal of Applied & Environmental Biology,2019,25(06):1277-1287.[doi:10.19675/j.cnki.1006-687x.2019.02014]
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北亚热带常绿阔叶林乔灌草物种的碳氮磷生态化学计量比
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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:
1277-1287
栏目:
研究论文
出版日期:
2019-12-30

文章信息/Info

Title:
Ecological stoichiometric ratio of carbon, nitrogen, and phosphorus in tree, shrub, and herb species in a subtropical evergreen broad-leaved forest
作者:
朱亮顾国军徐振锋游成铭牟凌丁爽曾欣吴福忠
1四川农业大学生态林业研究所,四川省林业生态工程重点实验室,高山森林生态系统定位研究站 成都 611130 2四川省阿坝藏族羌族自治州川西林业局 理县 623102
Author(s):
ZHU Liang1 GU Guojun2 XU Zhenfeng1 YOU Chengming1 MOU Ling1 DING Shuang1 ZENG Xin1 & WU Fuzhong1**
1 Long-term Research Station of Alpine Forest Ecosystems, Provincial Key Laboratory of Ecological Forestry Engineering, Institute of Ecology and Forestry, Sichuan Agricultural University, Chengdu 611130, China 2 Western Sichuan Forestry Bureau of Ngawa Tibetan and Qiang Autonomous Prefecture, Lixian 623102, China
关键词:
北亚热带常绿阔叶林生活型植物器官养分利用养分限制
Keywords:
north subtropical evergreen broad-leaved forest life form plant organ nutrient utilization nutrient limitation
分类号:
S718.5
DOI:
10.19675/j.cnki.1006-687x.2019.02014
摘要:
碳氮磷生态化学计量比是认识植物养分利用与分配的重要指标,一定程度上表征了物种在生态系统中的生存适应策略,但不同生活型的物种(如乔灌草)往往具有较大的差异,且缺乏必要关注. 因此,为认识四川盆地北亚热带典型常绿阔叶林中主要乔灌草物种的氮磷利用特征,以9个乔木树种、3个灌木物种和4个草本物种为研究对象,分析不同物种叶、枝、皮、茎和根等器官的碳氮磷含量及生态化学计量特征. 结果显示:总体而言,草本植物的氮和磷的含量大于乔木和灌木,但乔木物种的碳氮比、碳磷比和氮磷比均大于灌木和草本,表明乔木植物相较于灌木和草本植物可能具有更加高效的氮磷利用效率;不同器官氮含量表现为叶>枝>皮>根>茎,但磷含量表现为叶>枝>皮>茎>根;碳氮比表现为茎>根>皮>枝>叶,碳磷比表现为茎>皮>根>枝>叶,而氮磷比表现为皮>叶>根>枝>茎. 3类生活型植物同一器官的氮和磷含量、碳氮比、碳磷比以及氮磷比均存在较大的差异,其中乔木叶片的氮磷比小于16大于14,灌木和草本植物的叶片的氮磷比均小于14,表明灌木和草本植物受到氮的限制作用可能较大. 这些结果意味着该区域林下植物养分利用效率相对较低且受到氮限制作用更为强烈,可为相似常绿阔叶林可持续经营和管理提供理论依据. (图5 表1 参36)
Abstract:
Ecological stoichiometric ratios of carbon, nitrogen, and phosphorus are the key indicators of nutrient utilization and allocation in plants, and they represent the living and adapting strategies of species in an ecosystem. However, different plant types (such as trees, shrubs, and herbs) often display various stoichiometric ratios, with various nitrogen and phosphorus utilization strategies, but this has not been investigated in detail. Therefore, in order to understand the characteristics of nitrogen and phosphorus utilization in different life forms in a typical evergreen broad-leaved forest, nine tree species, three shrub species, and four herb species were selected from the northern subtropical area of the Sichuan Basin. The ecological stoichiometries of carbon, nitrogen, and phosphorus were analyzed in leaves, twigs, barks, stems, and roots of different species. The results showed that the concentrations of nitrogen and phosphorus were higher in herbs than in trees and shrubs, but the carbon to nitrogen ratio, carbon to phosphorus ratio, and nitrogen to phosphorus ratio were higher in trees than in shrubs and herbs, which showed that tree plants may have higher utilization efficiency of nitrogen and phosphorus than those of shrubs and herbs. The concentration of nitrogen in different organs was as follows, from the highest to the lowest: leaf > twig > bark > root > stem, while the concentration of phosphorus in different organs was as follows: leaf > twig > bark > stem > root. The carbon to nitrogen ratio in different organs was as follows: stem > root > bark > twig > leaf, the carbon to phosphorus ratio in different organs was as follows: stem > bark > root > twig > leaf, while the nitrogen to phosphorus ratio in different organs was as follows: bark > leaf > root > twig > stem. The concentrations of nitrogen and phosphorus, carbon to nitrogen ratio, carbon to phosphorus ratio, and nitrogen to phosphorus ratio differed significantly between the same organs of the three investigated life forms. The nitrogen to phosphorus ratio in the leaves of trees was between 14 and 16, whereas the nitrogen to phosphorus ratio in the leaves of shrubs and herbs was less than 14, indicating that shrubs and herbs may be more restricted by nitrogen. These results indicated that the nutrient utilization efficiency of understory plants in this area was relatively lower and more strongly affected by nitrogen limitation, which provided some theoretical basis for sustainable management of similar evergreen broad-leaved forests.

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更新日期/Last Update: 2019-12-25