干旱区生态环境知识资源中心(Arid): 宁夏中部干旱带苜蓿碳同位素分辨率的替代指标

Arid

	宁夏中部干旱带苜蓿碳同位素分辨率的替代指标
其他题名	Substitution indexes of carbon isotope discrimination for alfalfa in arid area of central Ningxia
	郑淑欣; 朱林; 许兴; 侯志军
来源期刊	草业科学
ISSN	1001-0629
出版年	2013
卷号	30 期号:12 页码:2011-2017
中文摘要	为了研究苜蓿(Medicago sativa)节水品种筛选碳同位素分辨率替代指标的可行性,在宁夏中部干旱带采用喷灌方法,设置3种水分处理,即,严重水分胁迫处理(全生育期不灌水)、中等水分胁迫(灌溉302mm)和充分灌水(562mm),对10个品种苜蓿材料始花期和盛花期的整株和叶片碳同位素分辨率(Delta~(13) C)与灰分含量、比叶重及叶片相对含水量、光合气体交换参数等之间的关系进行了研究。结果发现,水分处理对叶片及整株Delta~(13) C、叶片灰分含量、叶片相对含水量及叶片光合气体交换参数有显著影响(P<0.05)。严重水分胁迫条件下整株Delta~(13) C与比叶重呈负相关;严重水分胁迫及中度水分胁迫条件下叶片相对含水量与叶片Delta~(13) C及整株Delta~(13) C呈显著正相关;在严重水分胁迫条件及中度水分胁迫条件下整株灰分含量均与整株Delta~(13) C呈显著负相关;在中度水分胁迫处理下,叶片Delta~(13) C与气孔导度呈显著正相关。在宁夏半干旱地区有限供水的条件下,苜蓿的叶片比叶重、相对含水量和整株灰分含量可以作为叶片Delta~(13) C的替代指标来预测苜蓿的蒸腾效率。
英文摘要	In order to study the substitution indexes of carbon isotope discrimination for alfalfa, ten varieties of alfalfa materials were planted under three water conditions, including severe drought stress(with 0mm irrigation), moderate drought stress(with 302mm irrigation)and well watered(with 562mm irrigation), in arid area of central Ningxia. Relationships betweerDelta~(13) C(carbon isotope discrimination)and ash content, specific leaf dry weight, leaf relative water content, photosynthetic gas exchange parameters in leaf and whole plant were studied at the beginning of flowering stage and flowering stage. The results showed that there was significant effect of water treatment on leaf and whole plantDelta~(13)C, leaf ash content, specific leaf dry weight and photosynthetic gas exchange parameters. Specific leaf dry weight and whole plantDelta~(13)C were negatively correlated under severe drought stress. Leaf relative water content was positively related with whole plantDelta~(13) C under severe drought stress and moderate drought stress. Negative correlation between ash content and whole plantDelta~(13)C was observed under severe drought stress and moderate drought stress. It was accordingly concluded that specific leaf dry weight, leaf relative water content and whole plant ash content might be considered as the substitution indexes of carbon isotope discrimination to predict transpiration efficiency of alfalfa under water limited condition in arid area of Ningxia.
中文关键词	碳同位素分辨率 ; 蒸腾效率 ; 替代指标 ; 苜蓿
英文关键词	carbon isotope discrimination transpiration efficiency substitution indexes alfalfa
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5068713
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229280
作者单位	郑淑欣, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 朱林, 宁夏大学, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国.; 许兴, 宁夏大学农学院, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国.; 侯志军, 宁夏现代农业公司, 银川, 宁夏 750021, 中国.
推荐引用方式 GB/T 7714	郑淑欣,朱林,许兴,等. 宁夏中部干旱带苜蓿碳同位素分辨率的替代指标[J]. 宁夏大学,2013,30(12):2011-2017.
APA	郑淑欣,朱林,许兴,&侯志军.(2013).宁夏中部干旱带苜蓿碳同位素分辨率的替代指标.草业科学,30(12),2011-2017.
MLA	郑淑欣,et al."宁夏中部干旱带苜蓿碳同位素分辨率的替代指标".草业科学 30.12(2013):2011-2017.