Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (4): 758-762.DOI: 10.11733/j.issn.1007-0435.2015.04.014

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Effects of High Temperature on the Yield and Morphology of Alfalfa

LI De-feng1, LI Pu-fang2, MA Bao-luo3, WANG Cheng-zhang1, GUO Yu-xia1, JIANG Yi-bao1   

  1. 1. College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, Henan Province 450002, China;
    2. School of Life Science, Lanzhou University, Lanzhou, Gansu Province 730000, China;
    3. Eastern Cereal and Oilseed Research Centre, Ottawa, Canada
  • Received:2014-12-29 Revised:2015-02-24 Online:2015-08-15 Published:2015-08-26

温控条件下高温胁迫对紫花苜蓿地上部分生长的影响

李德锋1, 李朴芳2, 马保罗3, 王成章1, 郭玉霞1, 姜义宝1   

  1. 1. 河南农业大学牧医工程学院, 河南 郑州 450002;
    2. 兰州大学生命科学学院, 甘肃 兰州 730000;
    3. 加拿大农业部东方谷物研究中心, 加拿大 渥太华
  • 通讯作者: 王成章
  • 作者简介:李德锋(1978-),男,河南新乡人,博士研究生,讲师,研究方向为草业科学,E-mail:Leadephone@126.com
  • 基金资助:

    国家牧草产业技术体系(CARS-35);十二五科技支撑计划(2011BAD17B04);加拿大项目资助

Abstract:

In order to study the effects of high temperature on the yield and morphology of alfalfa (Medicago sativa),6 alfalfa varieties were planted in growth chamber with different day/night temperatures of 25/20℃ and 35/30℃. The results showed that heat stress decreased plant height, yield and leaf area. The yield of alfalfa plant decreased 54%, whereas the leaf thickness increased 54%. The data implied that heat stress was one of the main reasons reducing summer yields. Therefore, alfalfa is heat sensitive and can adapt to heat stress through a series of morphological changes.

Key words: Alfalfa, High temperature, Yield, Morphology

摘要:

本研究的目的在于探讨高温对紫花苜蓿(Medicago sativa)产量和形态的影响。试验采用盆栽方法,选取6个紫花苜蓿品种,将其种植在2个生长培养箱内,2个培养箱温度(白天/黑暗)分别设置为25/20℃和35/30℃,测定其产量、株高、叶部特征及叶片叶绿素含量。结果表明,高温胁迫使紫花苜蓿生长受到抑制,植株矮小,产量降低54%;单叶片叶面积缩小至常温的1/4,但叶片厚度增加了54%。综合上述结果可以看出,高温是生产中紫花苜蓿夏季减产的一个重要原因,紫花苜蓿对高温非常敏感,但会通过一系列形态上的变化来适应高温的胁迫。

关键词: 紫花苜蓿, 高温, 产量, 形态

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