文献类型：期刊文献

中文题名：稳定碳同位素测定水分利用效率——以决明子为例

英文题名：Feasibility analysis on the determination of WUE by stable carbon isotope:Cassia obtusifolia L. as an example

作者：陈平[1] 张劲松[1] 孟平[1] 何春霞[1] 贾长荣[2] 李建中[2]

第一作者：陈平

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室;[2]济源市国有大沟河林场

年份：2014

卷号：34

期号：19

起止页码：5453-5459

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(31170409);国家"十二五"科技支撑计划项目(2011BAD38B02)

语种：中文

中文关键词：稳定碳同位素;水分利用效率;决明子

外文关键词：stable carbon isotope;water use efficiency;Cassia obtasifolia L.

分类号：S152.7

摘要：通过称重法和稳定碳同位素方法对盆栽决明子生长不同时期不同部位(根、茎、叶)的碳同位素组成(δ13C)、碳同位素分辨率(Δ)和水分利用效率(WUE)进行了研究,并分析了它们之间的相关关系,结果表明:决明子不同部位δ13C值表现为根>茎>叶,Δ为根<茎<叶,不同时期方差分析显示只有根部差异显著,茎叶的δ13C值、碳同位素分辨率分别与水分利用效率呈显著的正相关和负相关关系。称重法得出的WUE和不同部位(根、茎、叶)碳同位素测定的水分利用效率(WUER、WUES、WUEL)有显著正线性相关,其中与WUEL相关系数最大为0.86,与WUES、WUER的相关系数分别为0.80和0.82。说明利用稳定碳同位素方法测定决明子水分利用效率具有可行性,尤其是利用叶片测定的水分利用效率得到更为可靠的结果。
Stable carbon isotope use efficiency （WUE） , and was composition （δ^13C value） was one of the effective methods for measuring the plant water already applied in many plants. At present, the study on estimation of the WUE of Cassia obtusifolia L.. by δ^13C was a few. In order to prove the reliability of δ^13C on measuring WUE for Cassia obtusifolia L., δ^13C, stable carbon isotope discrimination （△^13C） ,WUE and the relationship among them are measured in different organs （root, steam, leaf） and different growth stages by pot experiment and δ^13C. The results showed that, the δ^13C value and △^13C of roots were highest, the next were stems, leaves were minimum, there were significant level in the δ^13Cvalue and △^13C in roots in different growth stages, positive relationship were found between the δ^13C value and WUE in stems and leaves, negative relationship were found between the △^13C and WUE in stems and leaves. It showed significant positive correlation level among WUE （ Potted method） and WUEL . WUEs . WUER （ Carbon isotope method ）, related coefficient were 0.86, 0. 82,0.80 respectively, those showed carbon isotope technology was reliable to determine the WUE of Cassia obtusifolia L..