干旱区生态环境知识资源中心(Arid): 鄱阳湖沙山单叶蔓荆不同器官碳、氮、磷化学计量特征

Arid

	鄱阳湖沙山单叶蔓荆不同器官碳、氮、磷化学计量特征
其他题名	C, N and P stoichiometry in different organs of Vitex rotundifolia in a Poyang Lake desertification hill
	周红艳 1; 吴琴 1; 陈明月 1; 匡伟 1; 常玲玲 1; 胡启武 2
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2017
卷号	41 期号:4 页码:461-470
中文摘要	在鄱阳湖湖滨沙山沿沙化梯度测定了单叶蔓荆(Vitex rotundifolia)花、叶、枝条、匍匐茎、细根的碳(C)、氮(N)、磷(P)含量,以阐明单叶蔓荆各器官C、N、P含量及化学计量比的分配格局,探讨养分元素及其化学计量之间的关联及对沙化程度的响应。结果表明: (1)单叶蔓荆各器官C、N、P含量变化范围分别为386.28-449.47 mg·g~(-1)、11.40-25.37 mg·g~(-1)、0.89-1.54 mg·g~(-1)。各器官中以花的N、P含量最高。(2)沙化程度仅对C、N含量及C:P影响显著,而器官是影响单叶蔓荆C、N、P含量及化学计量比的主导因子;单叶蔓荆基于质量的N、P含量之间的关系在不同沙化程度区未发生策略位移现象, N:P化学计量比具有保守性特征,没有随沙化程度与器官的改变而发生显著变化。(3)单叶蔓荆各器官的相关性主要集中在地上部分,其中枝条与匍匐茎之间的关系最为密切,二者之间的C、N、P含量及C:N、C:P化学计量比均表现为显著性相关。
英文摘要	Aims The objectives were to clarify the responses of C, N and P stoichiometry of Vitex rotundifolia to desertification, and determine the C, N and P stoichiometric relationships among the organs. Methods In this study, different organs (e.g. flowers, leaves, twigs, creeping stems, fine roots) of V. rotundifolia were sampled along a desertification gradient in a typical Poyang Lak sandy hill. Subsequently, C, N and P contents of various organs were measured. Important findings The results showed nutrient contents in different organs ranged from 386.28 to 449.47 mg·g~(-1) for carbon, 11.40 to 25.37 mg·g~(-1) for nitrogen and 0.89 to 1.54 mg·g~(-1) for phosphorus, respectively. C, N and P contents differed significantly among the five organs. The maximum N and P content were found in flowers, whereas the minimums were observed in twigs and creping stems. Moreover, desertification intensity only significantly affected C, N and C:P. C:N and N:P ratios maintained relatively stable. Except N:P, the other nutrient elements and associated stoichiometry significantly differed among the organs. Hence, organs, rather than desertification intensity mainly controlled the C, N and P content and their stoichiometry variability. Although there was a positive correlation between mass-based N content (N_(mass)) and P content (P_(mass)) across the three desertification zones, the N_(mass)-P_(mass) relationship in V. rotundifolia did not shift. Irrespective desertification intensity and organs, N:P stoichiometry of V. rotundifolia was well constrained. In addition, significant correlations of C, N and P contents among organs were mainly found in the above-ground parts, especially between twigs and creeping stems.
中文关键词	鄱阳湖 ; 沙山 ; 植物器官 ; 养分 ; 化学计量比
英文关键词	Poyang Lake desertification hill plant organ nutrient stoichiometry
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5993826
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236958
作者单位	1.江西师范大学地理与环境学院, 南昌, 江西 330022, 中国; 2.江西师范大学地理与环境学院, 鄱阳湖湿地与流域研究教育部重点实验室, 南昌, 江西 330022, 中国
推荐引用方式 GB/T 7714	周红艳,吴琴,陈明月,等. 鄱阳湖沙山单叶蔓荆不同器官碳、氮、磷化学计量特征[J],2017,41(4):461-470.
APA	周红艳,吴琴,陈明月,匡伟,常玲玲,&胡启武.(2017).鄱阳湖沙山单叶蔓荆不同器官碳、氮、磷化学计量特征.植物生态学报,41(4),461-470.
MLA	周红艳,et al."鄱阳湖沙山单叶蔓荆不同器官碳、氮、磷化学计量特征".植物生态学报 41.4(2017):461-470.