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[1]蒋龙,徐振锋,吴福忠,等.亚热带3种典型常绿森林土壤和植物叶片碳氮磷化学计量特征[J].应用与环境生物学报,2019,25(04):759-767.[doi:10.19675/j.cnki.1006-687x.2018.11023]
 JIANG Long,XU Zhenfeng,et al.Stoichiometric characteristics of C, N, and P in soil and plant leaves in three typical evergreen forest types in subtropical zone[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):759-767.[doi:10.19675/j.cnki.1006-687x.2018.11023]
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亚热带3种典型常绿森林土壤和植物叶片碳氮磷化学计量特征
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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04期
页码:
759-767
栏目:
生态系统养分循环与保护恢复专栏
出版日期:
2019-08-25

文章信息/Info

Title:
Stoichiometric characteristics of C, N, and P in soil and plant leaves in three typical evergreen forest types in subtropical zone
作者:
蒋龙;?徐振锋;?吴福忠;?谭波;?游成铭;?李汉森;?刘一霖;?彭永翔;?曾合州;?杨万勤
1长江上游林业生态工程四川省重点实验室 成都 611130 2四川农业大学生态林业研究所 成都 611130
Author(s):
JIANG Long1;? 2;? XU Zhenfeng1;? 2;? WU Fuzhong1;? 2;? TAN Bo1;? 2;? YOU Chengming1;? 2;? LI Hansen1;? 2;? LIU Yilin1;? 2;? PENG Yongxiang1;? 2;? ZENG Hezhou1;? 2 & YANG Wanqin1;? 2**
1Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu 611130, China 2Institute of Forestry & Ecology, Sichuan Agricultural University, Chengdu 611130, China
关键词:
化学计量特征;? 森林类型;? 生活型;? 养分限制;? Ⅱ类线性回归
Keywords:
stoichiometry;? forest type;? life form;? nutrient limitation;? model Type Ⅱ regression
分类号:
S718.5
DOI:
10.19675/j.cnki.1006-687x.2018.11023
摘要:
为深入了解亚热带常绿森林生态系统养分循环和系统稳定机制,以四川省宜宾市老君山国家级自然保护区内3种典型森林(水杉和柳杉人工林、中华木荷和鸡爪槭次生林以及总状山矾和天全钓樟原始常绿阔叶林)作为研究对象,研究其表层土壤(0-10 cm)和乔木、灌木、草本生活型植物叶片的C、N、P化学计量特征. 结果表明:(1)表层土壤C、N、P含量以原始林最高,人工林最低,人工林土壤C:N最高,次生林土壤C:P最高,原始林土壤N:P最高;(2)乔木叶片C、N、P含量最高,草本植物最低;人工林乔木叶片C:N、C:P比最高;乔木、灌木、草本N:P比分别为13.9、14.1、9.3;人工林乔木N:P(10.2)最低,次生林乔木N:P(14.5)与原始林(13.8)较高;(3)植被整体及乔木、灌木、草本整体叶片N、P含量间Ⅱ类线性回归斜率约等于1,表明叶片N与P含量呈等速投入关系. 可见,乔、灌木整体更易受P限制,草本更易受N限制;在土壤N、P供应较为贫瘠的人工林受N限制更为明显,而物种较为丰富、土壤养分供应较为充足的天然林P限制更为明显. (图4 表3 参37)
Abstract:
The aim of the study was to investigate the stoichiometric characteristics of C, N, and P in plant leaves and soil and to provide a scientific basis for a better understanding of nutrient cycling and stability mechanisms in subtropical evergreen forests. The study site was located in the Laojunshan National Nature Reserve in Yibin City, Southwest Sichuan Province, China. The stoichiometric characteristics of C, N, and P were investigated in the leaves of three typical forest plant types—trees, shrubs and herbs—and topsoil (0-10 cm) in two artificial forests dominated by Cryptomeria fortunei or Metasequoia glyptostroboides, two secondary forests dominated by Schima sinensis or Acer palmatum, and two primary evergreen broadleaved forests dominated by Symplocos botryantha or Lindera tienchuanensis. The results showed that: 1) the concentrations of C, N and P in the topsoil were highest in the primary forest and lowest in the plantation forest. Soil C:N was highest in the plantation forest, C:P was highest in the secondary forest, and N:P was highest in the primary forest. 2) The concentrations of C, N, and P were highest in tree leaves and lowest in herbs. Tree leaves in plantation forest had the highest C:N and C:P, indicating the highest utilization efficiency of N and P. The tree, shrub, and herb N:P ratios were 13.9, 14.1, and 9.3, respectively. Plantation trees had the lowest N:P (10.2), while that in secondary forest trees (14.5) and primary forest trees (13.8) was higher. 3) The II linear regression slope for vegetation as a whole and whole leaf N, P concentrations in trees, shrubs, and herbs was approximately equal to 1, indicating that leaf N and P content had uniform input relations. In conclusion, trees and shrubs were more limited by P, and herbs were more limited by N; the plantations forest had relatively poor soil N and P supply and more obvious N limitation, while the natural forests with relatively high species richness and adequate soil nutrient supply had more obvious P limitation.

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38.

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更新日期/Last Update: 2019-08-25