干旱区生态环境知识资源中心(Arid): 湘西南石漠化地区灌丛植物叶N、P化学计量特征

Arid

	湘西南石漠化地区灌丛植物叶N、P化学计量特征
其他题名	Leaf nitrogen and phosphorus stoichiometry of shrubland plants in the rocky desertification area of Southwestern Hunan, China
	景宜然 1; 邓湘雯 2; 魏辉 1; 李艳琼 3; 邓东华 4; 刘豪健 4; 项文化 2
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2017
卷号	28 期号:2 页码:415-422
中文摘要	以湘西南石漠化地区灌丛植物叶片为研究对象,分析了不同功能群植物以及3种不同石漠化程度(轻度、中度、重度)下植物叶片N、P化学计量特征.结果表明:湘西南石漠化地区常见植物叶片平均N含量为12.89 g · kg~(-1),P含量为1.19 g · kg~(-1),N/P值为11.24,大部分植物生长受到N的限制.不同生活型之间植物叶片N含量为落叶灌木>常绿灌木>一年生草本> 多年生草本,P含量与N/P值为落叶灌木>多年生草本.不同科植物之间叶片N、P含量和N/P值差异显著,禾本科植物叶片N、P含量最低,与其他科植物共同受N限制;豆科植物叶片N含量和N/P值最高,主要受P限制.双子叶植物与C3植物叶片N、P含量分别高于单子叶植物与C4植物,N/P值差异均不显著.固氮植物叶片N含量以及N/P值均高于非固氮植物,P含量差异不显著.各样地中植物叶片N、P含量之间的相关性显著,N/P值与N含量的相关性显著,仅与中度石漠化样地P含量差异显著.不同石漠化程度之间植物叶N、P含量以及N/P值差异不显著.
英文摘要	In this paper, we took the leaves of shrubland plants in rocky desertification area in Southwestern Hunan as the research object to analyze the nitrogen (N) and phosphorus (P) stoichiometry characteristics for different functional groups and different grades of rocky desertification, i.e.,light rocky desertification (LRD),moderate rocky desertification (MRD) and intense rocky desertification (IRD). The results showed that the average contents of N and P were 12.89 and 1.19 g · kg~(-1), respectively, and N/P was 11.24 in common shrubland plants in the study area, which indicated that the growth of most plants were mainly limited by N. The content of N was declined in order of deciduous shrubs > evergreen shrubs > annual herbs > perennial herbs. The content of P and N/P were higher in deciduous shrubs than in perennial herbs. Significant differences were found among the main families of plants in terms of the contents of N, P and N/P in the study sites. The plants of Gramineae had the lowest contents of N and P,and their growth was mostly restricted by N, while Leguminosae had the highest content of N and N/P, and their productivity was majorly controlled by P. The contents of N and P in the leaves were significantly higher in dicotyledon plants and C3 plants than in monocotyledon plants and C4 plants,but the N/P was not significantly different between these two plant categories. The nitrogen-fixing plants had higher content of N and N/P than the non-nitrogen-fixing plants,but the P content was not significantly different between these two plant groups. There were significant correlations between contents of N and P,N/P and N in all study plots. No significant correlation was found between N/P and P content in the examined rocky desertification sites, except for that in MRD. There were no significant differences of the contents of N, P and N/P under different grades of rocky desertification.
中文关键词	石漠化 ; 植物功能群 ; 叶N、P化学计量
英文关键词	rocky desertification plant functional group leaf N and P stoichiometry
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5909468
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236899
作者单位	1.中南林业科技大学生命科学与技术学院, 长沙, 湖南 410018, 中国; 2.中南林业科技大学生命科学与技术学院, 南方林业生态应用技术国家工程实验室, 长沙, 湖南 410018, 中国; 3.中南林业科技大学生命科学与技术学院, 广西喀斯特植物保育与恢复生态学重点实验室, 长沙, 湖南 410018, 中国; 4.邵阳县林业局, 邵阳, 湖南 422100, 中国
推荐引用方式 GB/T 7714	景宜然,邓湘雯,魏辉,等. 湘西南石漠化地区灌丛植物叶N、P化学计量特征[J],2017,28(2):415-422.
APA	景宜然.,邓湘雯.,魏辉.,李艳琼.,邓东华.,...&项文化.(2017).湘西南石漠化地区灌丛植物叶N、P化学计量特征.应用生态学报,28(2),415-422.
MLA	景宜然,et al."湘西南石漠化地区灌丛植物叶N、P化学计量特征".应用生态学报 28.2(2017):415-422.