干旱区生态环境知识资源中心(Arid): 水分对敦煌阳关湿地芦苇叶片与土壤C、N、P生态化学计量特征的影响

Arid

	水分对敦煌阳关湿地芦苇叶片与土壤C、N、P生态化学计量特征的影响
其他题名	Effects of soil moisture on Phragmites australis leaves and soil C,N and P ecological stoichiometric characteristics in Yangguanwetland,Dunhuang
	刘冬; 张剑; 包雅兰; 赵海燕; 陈涛
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:11 页码:3804-3812
中文摘要	土壤水分是影响干旱区植物养分吸收和利用策略的关键因子之一。研究不同水分梯度叶片与土壤生态化学计量特征,有助于揭示植物对环境变化的响应特征及生态适应性。通过野外调查与实验分析,对敦煌阳关不同水分梯度芦苇叶片与土壤碳(C) 、氮(N) 、磷(P)生态化学计量特征及其关系进行了研究。结果表明:(1)随土壤含水率升高,叶片C、N、P含量降低,叶片C/N、C/P、N/P升高。(2)随土壤含水率升高,土壤有机碳(OC) 、总氮(TN) 、总磷(TP)含量及土壤N/P升高,土壤C/N降低,土壤C/P先升后降。(3)低水分梯度叶片N、C/N与土壤N、C/N显著负相关(P<0.05),叶片C、P、C/P、N/P与土壤C、P、C/P、 N/P无显著相关性(P>0.05);高、中水分梯度叶片C、N、P与土壤C、N、P化学计量特征相关性均不显著(P>0.05) 。低水分梯度叶片受干旱胁迫和土壤养分制约,且能够保持较高的叶养分含量,体现了干旱区湿地植物异质生境下独特的养分调节机制。
英文摘要	Soil moisture is one of the key factors affecting the strategies of plant nutrient uptake and utilization in arid region.Studies on leaf and soil ecological stoichiometry characteristics under different soil moisture gradients are helpful to reveal the response and ecological adaptability of plants to environmental changes.Through field investigation and experimental analysis,reed leaves and soil C,N,P ecological stoichiometric characteristics under different soil moisture gradients and their relationships in the Yangguan wetland of Dunhuang were studied.The results showed that:(1) with the increase of soil moisture content,the contents of leaf C,N and P showed a decreasing trend,while leaf C/N,C/P,and N/ P showed the opposite trend;(2) with the increase of soil moisture content,the content of soil organic carbon(OC),total nitrogen(TN),total phosphorus(TP),and N/P increased,soil C/N ratio decreased and soil C/P first increased and then decreased;(3) under the low soil moisture gradient,N and C/N of leaves were significantly negative correlated with soil N and C/N(P<0.05),and leaf C,P,C/P,N/P had no significant correlation with soil C,P,C/P,and N/P(P>0.05) .There was no significant correlation between the soil and leaf stoichiometric characteristics under the high and medium soil moisture gradients(P>0.05) .Leaves under low soil moisture gradient,which were restricted by drought stress and soil nutrients,could maintain higher leaf nutrient content,reflecting the unique nutrient regulation mechanism of wetland plants under heterogeneous habitats in arid areas.
中文关键词	生态化学计量学 ; 水分梯度 ; 敦煌阳关 ; 芦苇叶片
英文关键词	ecological stoichiometric moisture gradient Dunhuang Yangguan reed leaf
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6739104
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336548
作者单位	刘冬, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 张剑, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 包雅兰, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 赵海燕, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 陈涛, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	刘冬,张剑,包雅兰,等. 水分对敦煌阳关湿地芦苇叶片与土壤C、N、P生态化学计量特征的影响[J],2020,40(11):3804-3812.
APA	刘冬,张剑,包雅兰,赵海燕,&陈涛.(2020).水分对敦煌阳关湿地芦苇叶片与土壤C、N、P生态化学计量特征的影响.生态学报,40(11),3804-3812.
MLA	刘冬,et al."水分对敦煌阳关湿地芦苇叶片与土壤C、N、P生态化学计量特征的影响".生态学报 40.11(2020):3804-3812.