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子午岭林区两种天然次生林叶片C、N、P 化学计量特征的季节变化
李茜1,2; 彭守璋3,4; 陈云明3,4
2017
Source Publication水土保持学报
Volume31Issue:6Pages:319-325
Abstract

为阐明不同天然林叶片C、N、P化学计量特征及季节变化规律,了解植物对环境的适应策略,以陕西
省子午岭林区桥山林场的油松和辽东栎天然次生林为研究对象,对其生长季内不同月份叶片的C、N、P含
量及其计量比进行了分析。结果表明:(1)油松叶片C、N、P含量及其计量比分别为48.06%,1.15%,
0.11%和42.58,473.22,11.02,辽东栎叶片C、N、P含量及其计量比分别为43.16%,2.10%,0.19%和
25.47,380.18,14.49;两树种叶片各指标季节间变异系数表现为C含量最小,P含量最大。(2)两树种叶片
C、N、P含量及其计量比在整个生长季内的变化规律不一致,油松叶片C含量在4—6月显著下降,之后保
持平稳状态,8月后显著上升,至10月基本与4月持平;而辽东栎叶片C含量在整个生长季内变化不明显。
油松叶片N含量在6月前较稳定,6—8月显著下降,随后显著上升,至10月基本与6月持平;辽东栎叶片
N含量在4—6月显著下降,随后保持稳定,8月后再次显著下降,并在10月达到最低值。油松叶片P含量
在8月前变化不明显,8月后显著上升,并在10月达到最高值;辽东栎叶片P含量在4月到6月显著下降,
随后基本不变。两树种C∶N和C∶P的变化与N、P浓度相反;油松叶片N∶P在4—6月显著下降,6—8
月显著上升,8—10月再次显著下降,辽东栎叶片N∶P在6月前显著上升并达到最高值,6—10月显著下
降。(3)叶片C含量和C∶N主要受树种的影响,其他各指标受树种与月份交互作用的影响最大。(4)油
松叶片C含量显著高于辽东栎,N含量显著低于辽东栎,因此,C∶N 显著高于辽东栎,而辽东栎叶片的
N∶P显著高于油松,但P含量和C∶P在两者之间无显著性差异。除叶片C含量外,各指标季节间变异系
数均表现为油松小于辽东栎。研究结果丰富了天然林生态化学计量学的研究,同时也为黄土丘陵沟壑区
的森林恢复与管理工作提供了一定的理论依据。

Other Abstract

Abstract:In order to explore the seasonal variations of carbon (C),nitrogen (N)and phosphorus(P)
stoichiometric features in leaves of different natural secondary forests and understand the strategies of plant
adaptation to the environment,we chose Piuns tabulaeformis and Quercus wutaishania natural forests in
Ziwuling Forest district as study area,and subsequently investigated their C,N and P stoichiometric parameters in
leaves from April to October.The results showed:(1)Leaf C,N and P contents and stoichiometric ratios of
P.tabulaeformis were 48.06%,1.15%,0.11% and 42.58,473.22,11.02,respectively,and the same
parameters for Q.wutaishania were 43.16%,2.10%,0.19% and 25.47,380.18,14.49,respectively.
There were less seasonal dynamics in leaf C contents and more seasonal dynamics in leaf P contents than otherthrough the whole growth season.(2)Leaf C content of P.tabulaeformis significantly decreased from April
to June,then remained stable,but it significantly increased from August to October,which was almost equal
to April;while leaf C content of Q.wutaishania was almost constant.Leaf N content of P.tabulaeformis
remained stable before June,then significantly decreased from June to August,then it significantly increased
from August and in October,it was almost equal to April.Leaf N content of Q.wutaishaniasignificantly
decreased from April to June,then remained stable,but it significantly decreased again from August and
reached the lowest value in October.Leaf P content of P.tabulaeformis remained stable before August,
then significantly increased and reached the maximum value in October.Leaf P content of Q.wutaishania
significantly decreased from April to June,then remained stable.The changes of C∶N,C∶P of two species
were averse to their N,P contents.Leaf N∶P of P.tabulaeformis significantly decreased from April to
June,then significantly increased,and it significantly decreased from August to October.The N∶P of Q.
wutaishaniaincreased significantly and reached the maximum value before June and then significantly
decreased.(3)Factorial analysis showed that leaf C contents and C∶N mainly determined by tree species.
For other parameters,they were mainly affected by the interaction between tree species and month.(4)Leaf
C contents of P.tabulaeformis significantly higher than that of Q.wutaishania,however,leaf N content of
P.tabulaeformis was significantly lower than that of Q.wutaishania,therefore,leaf C∶N of P.tabulaeformis
was significantly higher than that of Q.wutaishania.However,leaf N∶P of Q.wutaishania was
significantly higher than that of P.tabulaeformis.There was no significant difference in leaf P content and
C∶P between these two species.The coefficient of seasonal variation of leaf N,P contents and C∶N,C∶P,
N∶P of P.tabulaeformis were smaller than those of Q.wutaishania.The results could enrich the study of
ecological stoichiometry in natural forests,and provide a theoretical basis for the forest restoration and
management in the hilly and gully region of Loess plateau.

Keyword子午岭林区 天然林 化学计量 季节变化
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8526
Collection水保所知识产出(1956---)
Affiliation1.中国科学院教育部水土保持与生态环境研究中心
2.中国科学院大学
3.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室
4.中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
李茜,彭守璋,陈云明. 子午岭林区两种天然次生林叶片C、N、P 化学计量特征的季节变化[J]. 水土保持学报,2017,31(6):319-325.
APA 李茜,彭守璋,&陈云明.(2017).子午岭林区两种天然次生林叶片C、N、P 化学计量特征的季节变化.水土保持学报,31(6),319-325.
MLA 李茜,et al."子午岭林区两种天然次生林叶片C、N、P 化学计量特征的季节变化".水土保持学报 31.6(2017):319-325.
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