ISWC OpenIR  > 水保所知识产出(1956---)
黄土丘陵区不同功能群植物碳氮磷生态化学计量特征 及其对微地形的响应
戚德辉1; 温仲明1,2,3; 王红霞3; 郭茹2; 杨士梭3
2016
Source Publication生态学报
Volume36Issue:20Pages:6420-6430
Abstract

研究黄土丘陵区植物碳氮磷生态化学计量特征及其对微地形变化的响应,对于深入理解植物对丘陵山地环境的适应策略
具有重要的意义。以黄土丘陵区森林草原带不同微地形环境( 坡向、坡位) 下的不同功能群植物为研究对象,对不同功能群植
物叶片和细根的C、N、P 含量及其化学计量特征进行了研究。结果表明: ( 1) 叶氮含量( LN) 、叶磷含量( LP) 、根氮含量( RN) 、
根碳含量( RC) 、叶碳/叶氮( LC/LN) 、叶碳/叶磷( LC/LP) 、叶氮/叶磷( LN/LP) 、根碳/根氮( RC/RN) 和根氮/根磷( RN/RP) 在
科属间差异显著( P<0.05) ,而叶碳含量( LC) 、根磷含量( RP) 和根碳/根磷( RC/RP) 在科属间差异不显著( P>0.05) 。( 2) 不同
科属植物生态化学计量特征对微地形变化的响应不同,禾本科细根C/N 在阴坡、阳坡差异性显著,豆科植物根N 含量在不同坡
位间差异显著( P<0.05) ; 菊科植物叶N 含量、叶C 含量、根N 含量、叶片C/N 和细根C/N 在不同坡位间差异显著( P<0.05) 。
( 3) 禾本科植物在中坡位受N、P 元素共同影响,在其它坡位主要受N 元素限制; 豆科植物在中坡位和上坡位主要受P 元素限
制,在下坡位和峁顶受N、P 元素共同影响; 菊科植物上坡位受N、P 元素共同影响,在其他坡位主要受N 元素限制。研究表明,
不同科属植物在不同微地形条件下受限的营养元素不同,对丘陵多变环境也存在不同的适应策略。

Other Abstract

Studying the stoichiometric characteristics of carbon ( C) ,nitrogen ( N) ,and phosphorus ( P) in plants of
different functional groups and their responses to micro-topographical variations in hilly and gully region of the Loess Plateau
of China will be beneficial in terms of understanding the adaptive strategies of plants to the hilly and gully environment. This
study involved an analysis in plants of different functional groups growing under different micro-topographical conditions,such as slope aspect and slope position,in a forest-steppe zone in the hilly and gully region of the Loess Plateau of China.
Specifically,we studied the stoichiometric characteristics of C,N,and P in leaf and root tissues of these plants and their
responses to micro-topographical conditions, including the concentrations of C,N, and P and the stoichiometric
characteristics of leaf and fine root tissue of plants in different functional groups. First,the results showed that the leaf total
N and P concentrations ( LN and LP,respectively) ,fine root total N concentration ( RN) ,root total C concentration
( RC) ,leaf C ∶N,C ∶P,and N ∶P ratios ( LC/LN,LC/LP and LN/LP,respectively) ,and fine root C ∶N and N ∶P ratios
( RC/RN and RN/RP,respectively) were significantly different at both the family and genus level ( P < 0. 05) . In
contrast,the leaf total C concentration ( LC) ,fine root total P concentration ( RP) ,and root C ∶P ratio ( RC/RP) were not
significantly different at either the family or genus level ( P > 0.05) . Second,the ecological stoichiometric characteristics of
different plant genera had different responses to micro-topographical variations. The RC/RN ratio of plants in the Gramineae
was significantly different at sites with either a south or north aspect. However,the concentrations of C,N,and P and the
stoichiometric characteristics of leaf and fine root tissues of plants in the Gramineae,Leguminosae,and Asteraceae were not
significantly different at sites with either a south or north aspect. The fine root N concentrations of plants in the Leguminosae
were significantly different for plants at different slope positions ( P < 0.05) . The LN,LC,root total N concentration,LC/
LN,RC/RN of plants in the Asteraceae differed significantly at sites with different slope positions ( P < 0.05) . Third,
plants in different families and genera adapted to the environment by reacting differently to the concentrations of C,N,and
P and stoichiometric characteristics. Generally,plants in the Gramineae were mainly limited by N and P in the middle slope
positions,while they were limited by N on the other slope positions. Leguminous plants were mainly limited by P in the
upper and middle slope positions,whereas they were limited by N and P at Mao ( mountaintop) and lower slope position.
Asteraceae plants were mainly limited by N and P on the upper slopes,whereas they were limited by N on the other slope
positions. The stoichiometric characteristics of plants belonging to different families and genera showed significant differences
among different micro-topographical environments. This indicated that plants in different families and genera may be limited
by different nutrient elements in different micro-topographical environments,and that these plants adapted to variations in
the hilly and mountainous environment may have different adaptive strategies. Leguminous and Graminaceous plants had a
strong overall adaptability to the environment through the coordination of various traits that allowed them to adapt to the
environment. However,Asteraceae plants adapted to environmental changes by unique and individual traits,allowing them
to adapt to local conditions.

Keyword黄土丘陵区 功能群 生态化学计量 微地形
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/361005/8593
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院
2.中国科学院教育部水土保持与生态环境研究中心
3.西北农林科技大学水土保持研究所
Recommended Citation
GB/T 7714
戚德辉,温仲明,王红霞,等. 黄土丘陵区不同功能群植物碳氮磷生态化学计量特征 及其对微地形的响应[J]. 生态学报,2016,36(20):6420-6430.
APA 戚德辉,温仲明,王红霞,郭茹,&杨士梭.(2016).黄土丘陵区不同功能群植物碳氮磷生态化学计量特征 及其对微地形的响应.生态学报,36(20),6420-6430.
MLA 戚德辉,et al."黄土丘陵区不同功能群植物碳氮磷生态化学计量特征 及其对微地形的响应".生态学报 36.20(2016):6420-6430.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[戚德辉]'s Articles
[温仲明]'s Articles
[王红霞]'s Articles
Baidu academic
Similar articles in Baidu academic
[戚德辉]'s Articles
[温仲明]'s Articles
[王红霞]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[戚德辉]'s Articles
[温仲明]'s Articles
[王红霞]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.