[1]李红,徐欢,陈金晨.土壤湿度对黄荆光合作用光响应过程的影响[J].北方园艺,2017,41(23):122-127.[doi:10.11937/bfyy.20171881]
　LI Hong,XU Huan,CHEN Jinchen.Effect of Soil Moisture on Light Response Process for Vitex negundo[J].Northern Horticulture,2017,41(23):122-127.[doi:10.11937/bfyy.20171881]
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土壤湿度对黄荆光合作用光响应过程的影响

《北方园艺》[ISSN:1001-0009/CN:23-1247/S] 卷: 第41卷 期数: 2017年23 页码: 122-127 栏目: 出版日期: 2017-12-10
Title:
Effect of Soil Moisture on Light Response Process for Vitex negundo
作者:
李红; 徐欢; 陈金晨
江苏师范大学 地测学院，江苏 徐州 221116
Author(s):
LI Hong; XU Huan; CHEN Jinchen
School of Geography,Geomatics and Planning,Jiangsu Normal University,Xuzhou,Jiangsu 221116
关键词:
光合作用; 水分利用效率; 黄荆; 光合有效辐射
Keywords:
photosynthesis; water use efficiency; Vitex negundo; photosynthesis active radiation
DOI:
10.11937/bfyy.20171881
文献标志码:
A
摘要:
以黄荆为试材，利用CIRAS-2型全自动便携式光合作用测定系统，测定并分析了不同土壤湿度对黄荆光合作用光响应过程的影响，以期为黄荆良好的生长发育提供坚实的植物生理生态学基础。结果表明：黄荆的光合速率、蒸腾速率、叶片水分利用效率、光能利用效率对土壤含水量和光合有效辐射的变化都有明显的阈值响应。根据Pn对光合有效辐射的响应特征得出，适度的土壤水分胁迫能提高黄荆对光照的适应能力。根据Pn和WUE对土壤湿度的响应特征得出，轻度水分胁迫能提高黄荆的Pn，当土壤相对含水量RWC约为57.7%时，黄荆的Pn达到最大值；中度水分胁迫能够提高黄荆的WUE，在RWC约为48.8%时，黄荆的WUE达到最大值。综合Pn、WUE与土壤湿度的定量关系认为，黄荆适宜的土壤湿度时RWC为39.6%～57.7%。在此土壤湿度范围内，黄荆在维持较高光合速率的同时，也有较高的水分利用效率。
Abstract:
In order to provide a solid foundation for the analysis of plant physiological ecology，the effects of soil moisture on photosynthetic light response process of Vitex negundo were studied by CIRAS-2 automatic and portable photosynthesis measuring system made in the USA.The results showed that the photosynthesis rate (Pn),transpiration rate (Tr),leaf water use efficiency (WUE),light use efficiency (LUE) had obvious threshold response to soil moisture and photosynthesis active radiation(PAR).According to Pn of PAR response characteristics of soil moisture,the adaptability to light could be improved in moderate stress.According to the response characteristics of Pn and WUE on soil moisture,Pn could be improved in mild water stress;when the soil relative water content(RWC) was about 57.7%,Pn reached the maximum value.WUE could also be improved in moderate water stress,and it reached the maximum value in 48.8%.Together the quantitative relationship between Pn,WUE and soil moisture,Vitex negundo could also maintain a high photosynthetic rate and water use efficiency in the range of soil moisture 39.6% to 57.7%.

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备注/Memo

第一作者简介：李红（1983-），女，博士，讲师，研究方向为城市生态与屋顶绿化。E-mail：lihong8303@126.com.

责任作者：徐欢（1984-），男，博士，副教授，研究方向为园林生态功能与景观保护。E-mail:6020130111@jsnu.edu.cn.
基金项目：国家自然科学基金资助项目（31500575，31500579）；江苏省自然科学基金资助项目（BK20150231）；江苏高校优势学科建设工程资助项目（PAPD）。
收稿日期：2017-07-10

更新日期/Last Update: 2017-12-19