干旱区生态环境知识资源中心(Arid): 鄱阳湖沙山植物叶片与土壤C:N、C:P沿沙化梯度分布特征

Arid

	鄱阳湖沙山植物叶片与土壤C:N、C:P沿沙化梯度分布特征
其他题名	C:N AND C:P STOICHIOMETRY OF LEAF AND SOIL IN RESPONSE TO DESERTIFICATION GRADIENT IN A SANDY HILL ALONG POYANG LAKE
	付姗 1; 吴琴 2; 郑艳明 1; 胡启武 2
来源期刊	长江流域资源与环境
ISSN	1004-8227
出版年	2015
卷号	24 期号:3 页码:447-454
中文摘要	在鄱阳湖多宝沙山沿沙化梯度测定了17种常见植物叶片及土壤有机碳(C)、全氮(N)、全磷(P)含量,以阐明沙山常见植物种与土壤C:N、C:P分布特征及对沙化的响应,为沙山植被恢复提供基础数据。结果表明:(1)植物叶片C:N、C:P分布范围为18.5~127.3、169.8~507.1,平均值分别为43.1、341.8;土壤0~10、10~30、30~50cm层C:N变化范围分别为9.8~46.3、2.4~46.5和3.7~45.0;相应土层C:P范围分别为19.8~75.9、3.0~90.5和4.7~76.5。(2)植物C:N、C:P对沙化的响应模式一致,均表现出在重度沙化区数值最小;土壤C:N随沙化程度增加表现出降低趋势,而C:P则表现出增加趋势,二者对沙化的响应不一致。(3)植物C:N、C:P变化主要取决于叶片的N、P含量;土壤C:N的变化受控于土壤N含量;C:P变化则决定于土壤有机C含量。
英文摘要	There are some sandy hills distributed along Poyang Lake,which belong to typical southern desertification.As located in subtropical climate zone,the sandy hills differed in vegetation and soil from northern deserts.Since carbon (C),nitrogen (N)and phosphorous (P)stoichiometry are critical indicators of biogeochemical coupling in terrestrial ecosystems,the nutrients stoichiometry has been successfully used in indicating community succession,vegetation restoration and degenerative process in recent years.The C:N and C:P of plant leaf can indicate the ability of assimilating the carbon when the plant uptakes the N and P elements,as well as the nutrient use efficiency of plant.The C:N and C:P of soil can reflect organic matter decomposition and soil nutrient supply.In addition,the homoeostasis of C, N and P stoichiometry is the important mechanism maintaining ecosystem structure,function and stability. However,carbon,nitrogen and phosphorous stoichiometry of the sandy hills along Poyang Lake were still poorly understood.In this study,leaves of 17dominant species and soil were sampled along desertification intensity gradient in Duobao sandy hill,Poyang Lake.Subsequently,leaf and soil organic carbon,total nitrogen and total phosphorous were measured.The objective of this study was to clarify C:N and C:P stoichiometry of leaf and soil in response to desertification intensity and provide a scientific basis for vegetation restoration.Results indicated that ratio of leaf carbon to nitrogen ranged from 18.5to 127.3, with mean of 43.1.The ratio of carbon to phosphorous varied from 169.8to 507.1,averaged at 341.8. The ratio of leaf carbon to nitrogen in high desertification intensity is 28.0,the ratio of carbon to phosphorous is 307.4.The ratio of leaf carbon to nitrogen in moderate desertification intensity is 59.5, and the ratio of carbon to phosphorous is 370.1.However,the ratio of leaf carbon to nitrogen in low desertification intensity is 39.0,while the ratio of carbon to phosphorous is 337.6.The soil C:N value ranged from 9.8to 46.3for 0-10cm depth,2.4to 46.5for 10-30cm depth and 3.7to 45.0for 30- 50cm depth,respectively.The soil C:P value varied from 19.8to 75.9,3.0to 90.5and 4.7to 76.5for the corresponding layers,respectively.Moreover,leaf C:N and C:P stoichiometry showed the same pattern in response to desertification intensity,with the minimum occurred in the high desertification area. Soil C:N and C:P stoichiometry showed different pattern along the desertification gradient.The ratio of C:N decreased with desertification intensity,but C:P value showed the opposite trend in contrast to C:N. Additionally,according to our correlation analysis results,the variation of leaf C:N and C:P was controlled by leaf nitrogen and phosphorous concentration.The soil C:N variation depended on soil total nitrogen.By comparison,soil C:P variation was controlled by soil organic carbon.
中文关键词	鄱阳湖沙山 ; 化学计量学 ; 碳氮比 ; 碳磷比
英文关键词	sandy hills along Poyang Lake stoichiometry C:N C:P
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:5385067
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233609
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	付姗,吴琴,郑艳明,等. 鄱阳湖沙山植物叶片与土壤C:N、C:P沿沙化梯度分布特征[J],2015,24(3):447-454.
APA	付姗,吴琴,郑艳明,&胡启武.(2015).鄱阳湖沙山植物叶片与土壤C:N、C:P沿沙化梯度分布特征.长江流域资源与环境,24(3),447-454.
MLA	付姗,et al."鄱阳湖沙山植物叶片与土壤C:N、C:P沿沙化梯度分布特征".长江流域资源与环境 24.3(2015):447-454.