干旱区生态环境知识资源中心(Arid): 降水变化和生长方式对红砂和珍珠化学计量特征的影响

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	降水变化和生长方式对红砂和珍珠化学计量特征的影响
其他题名	Effects of Precipitation and Growth Pattern on the Stoichiometric Characteristics of Reaumuria soongorica and Salsola Passerina
	杨洁; 单立山; 苏铭; 魏晓芸; 马静; 解婷婷; 李毅
来源期刊	草地学报
ISSN	1007-0435
出版年	2021
卷号	29 期号:10 页码:2221-2232
中文摘要	为揭示典型荒漠植物不同器官养分利用和调控策略对降水变化和生长方式的响应规律,本研究以红砂(Reaumuria soongorica)与珍珠(Salsola passerina)为材料,测定了不同降水梯度(年降水量50~300mm,Delta=50)下单生和混生红砂和珍珠不同器官中的有机碳(C)、全氮(N)含量。结果表明:随降水量的减少(干旱胁迫增加),单生红砂叶C,C/N和茎N含量逐渐减小;单生珍珠茎和根C含量整体呈增大趋势,表明干旱胁迫加剧时,单生红砂茎受N限制作用增强,但红砂会通过降低叶片有机C含量和C/N以提高生长速率;单生珍珠会选择适当地增加地下部分根系的C分配比例,并将多余的C储藏在茎中。各降水量条件下,混生红砂叶C,C/N和根C,N含量均大于单生,茎C含量小于单生;混生珍珠茎C,C/N和根C,N含量均小于单生,叶C,C/N含量大于单生,表明混生后红砂倾向于向根系分配更多C,N,而珍珠主要通过降低茎的C/N来提高地上部分生长速率。
英文摘要	In order to reveal the response of nutrient utilization and regulation strategies in different organs of typical desert plants to precipitation changes and growth patterns,Reaumuria soongorica and Salsola Passerina were taken as research objects in this study,and the carbon and nitrogen contents of different organs in monocultural and mixed plants were measured under different precipitation gradients(annual precipitation 50~300mm,Delta=50). The results showed that,with the decrease of precipitation(with the increase of drought stress),the C content and C/N in leaves and N content in stems decreased in monocultural R.soongorica,the C content in stems and roots of monocultural S.Passerinashowed a trend of increasing.This indicated that with the increase of drought stress, the effect of nitrogen limitation on the stem growth of monocultural R.soongoricaincreased while it could increase the growth rate by reducing the organic C content and C/N in leaves.The monocultural S.Passerina would choose to increase the proportion of C distribution in the root system and store the excess C in the stem.For each precipitation,the C,C/N contents in leaves,C,N contents in roots of mixed R.soongorica were higher than those in monocultural R.soongorica,while the C content in stems was lower than that in monocultural R.soongorica. The C,C/N contents in stems,C,N contents in roots of mixed S.Passerina were lower than those in monocultural S.Passerina,while the C,C/N contents in leaves were higher than those in monocultural S.Passerina,which indicated that R.soongoricatended to distribute more C and N to roots,while S.Passerina mainly increased the growth rate of above-ground part by reducing the C/N of stems for mixed growth.
中文关键词	降水变化 ; 生长方式 ; 有机碳 ; 全氮 ; 红砂 ; 珍珠
英文关键词	Precipitation gradient Growth pattern Organic carbon Total nitrogen Reaumuria soongorica Salsola passerina
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:7091574
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377508
作者单位	杨洁, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 单立山, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 苏铭, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 魏晓芸, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 马静, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 解婷婷, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 李毅, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	杨洁,单立山,苏铭,等. 降水变化和生长方式对红砂和珍珠化学计量特征的影响[J],2021,29(10):2221-2232.
APA	杨洁.,单立山.,苏铭.,魏晓芸.,马静.,...&李毅.(2021).降水变化和生长方式对红砂和珍珠化学计量特征的影响.草地学报,29(10),2221-2232.
MLA	杨洁,et al."降水变化和生长方式对红砂和珍珠化学计量特征的影响".草地学报 29.10(2021):2221-2232.