干旱区生态环境知识资源中心(Arid): 克里雅绿洲旱生芦苇根茎叶C、N、P化学计量特征的季节变化

Arid

	克里雅绿洲旱生芦苇根茎叶C、N、P化学计量特征的季节变化
其他题名	Seasonal variations in C,N,and P stoichiometry of roots,stems,and leaves of Phragmites australis in the Keriya Oasis,Xinjiang,China
	李红林; 贡璐; 洪毅
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:20 页码:6547-6555
中文摘要	旱生芦苇在水分限制、元素匮乏的环境条件下,经长期进化适应形成了自身独特的生理生态特征,研究其C、N、P化学计量特征随生长季节的变化规律有助于深人了解该植物生存和适应策略。系统分析了克里雅绿洲旱生芦苇根、茎、叶的C、N、P化学计量特征及其季节动态,深人探讨了不同生长季、不同器官以及两因素的交互作用对以上特征的影响。结果表明:旱生芦苇C、N、P含量均值分别为393.36、12.43、1.25 mg/g,C:N、N:P、C:P均值分别为54.55、9.96、441.27。整个生长季内芦苇各器官间C、N、P平均含量的变化规律一致,为叶>茎>根,C、N、P化学计量比的变化规律不一致;芦苇C含量随生长季节的变化不断增加,N、P随季节的变化逐渐减少,C、N、P化学计量比随季节的变化规律也不尽相同。对芦苇C、N、P含量及其化学计量比整体变异来源分析显示,生长季节的变化对芦苇C、P、C:N、C:P变化的贡献大于器官间差异,器官间差异对芦苇N、N:P变化的贡献大于生长季节的变化;说明芦苇生长发育过程中各生长季各器官对元素的吸收利用具有特异性。结合N、P元素含量及N:P值的大小可知,研究区芦苇生长受到N、P共同限制,且更易受N元素的限制。
英文摘要	C,N,and P are the basic chemical elements required for plant growth and regulation,and their balance and stability play an important role in many physiological functions. Ecological stoichiometry combines the first law of thermodynamics,the theory of evolution by natural selection,and the central dogma of molecular biology,and has organically integrated biological studies at the scales of molecules,cells,species groups,communities,and ecosystems. Plants adjust their growth rate to adapt to environmental changes throughout their lives. The growth rate can be regulated by C:N:P ratios; therefore,these ratios reflect the adaptability of plants to the external environment. Seasonal variations in C:N:P ratios reflect the seasonal variations in plant growth rate. Consequently,research on the seasonal variations in C:N:P ratios can increase our understanding of plant adaptation strategies. There has been limited research on the change in C,N,and P during the xerophyte growing season. In this study,Phragmites australis,the common reed,was used to examine the contents of C,N,and P and their ratios in roots,stems,and leaves in different seasons in the Keriya Oasis,China. The contents of C,N,and P in the plants ranged from 140.4 to 565.1 (average 393.36 99.92) mg/g for C,2.19 to 34.48(average 12.43 8.70) mg/g for N and 0.26 to 4.42 (average 1.25 0.74) mg/g for P. The means of the C:N,N:P,and C:P ratios were 54.55,9.96,and 441.27,respectively. The order of the mean contents of C,N,and P in all organs was leaves > stems > roots during the growing seasons. The content of C in roots,stems,and leaves increased first,and then decreased again. The contents of N and P in roots and stems decreased gradually during the growing season. The contents of N and P in leaves decreased first,and then increased again. The changes in C:N and C:P ratios were opposite to those in corresponding N and P contents in roots,stems,and leaves. The ratio of N:P was highest in leaves and was lowest in roots. The C,N,and P contents and their ratios had moderate variability in all organs throughout the growing season. Factorial analysis of variation for each parameter,with sampling season and organs as independent variables,showed that the contents of C and P and C:N and C:P mass ratios mainly depended on the season. The content of N and the N:P mass ratio were mainly determined by the organs. Furthermore,N is a restrictive factor for Phragmites australis in the Kenya Oasis during its growth and development.
中文关键词	旱生芦苇 ; 生态化学计量学 ; 器官 ; 季节 ; 克里雅绿洲
英文关键词	Phragmites australis ecological stoichiometry organs seasons Keriya Oasis
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:5847071
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234821
作者单位	新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	李红林,贡璐,洪毅. 克里雅绿洲旱生芦苇根茎叶C、N、P化学计量特征的季节变化[J]. 新疆大学,2016,36(20):6547-6555.
APA	李红林,贡璐,&洪毅.(2016).克里雅绿洲旱生芦苇根茎叶C、N、P化学计量特征的季节变化.生态学报,36(20),6547-6555.
MLA	李红林,et al."克里雅绿洲旱生芦苇根茎叶C、N、P化学计量特征的季节变化".生态学报 36.20(2016):6547-6555.