Research and Evaluation on Drought Resistance of Six Grasses in High-cold Pastoral Area

doi:10.11733/j.issn.1007-0435.2018.03.019

Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (3): 659-665.DOI: 10.11733/j.issn.1007-0435.2018.03.019

Research and Evaluation on Drought Resistance of Six Grasses in High-cold Pastoral Area

LI Jing-rong^1,2, ZHOU Xue-bing⁶, MA Zhen^2,3, LIU Ze-hua¹, SHI Guo-xi⁴, WANG Wen-ying¹, ZHANG Zhong-hua^2,5, GUO Mei-ling^2,5, YAO Bu-qing², ZHANG Chun-hui³, MA Li², ZHOU Hua-kun^2,3

1. Qinghai Normal University, Xining, Qinghai Province 810008, China;
2. Key Laboratory of Cold Restoration Ecology, Qinghai Province, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
3. State Key Laboratory of Ecology and Plateau Agriculture and Animal Husbandry, Sanjiang, Qinghai Province 810016, China;
4. Gansu Key Laboratory for Utilization of Agricultural Solid Waste Resources, Gansu Province, Tianshui Normal University, Tianshui, Gansu Province 741000, China;
5. University of Chinese Academy of Sciences, Beijing 100049, China;
6. Qinghai hydrological water resources survey bureau, Xining, Qinghai Province 810001, China

Received:2017-12-28 Revised:2018-05-21 Online:2018-06-15 Published:2018-08-24

6种高寒牧区禾本科牧草抗旱性研究与评价

李京蓉^1,2, 周学斌⁶, 马真^2,3, 刘泽华¹, 石国玺⁴, 王文颖¹, 张中华^2,5, 郭美玲^2,5, 姚步青², 张春辉³, 马丽², 周华坤^2,3

1. 青海师范大学, 青海西宁 810008;
2. 中国科学院西北高原生物研究所青海省寒区恢复生态学重点实验室, 青海西宁 810001;
3. 青海大学省部共建三江源生态与高原农牧业国家重点实验室, 青海西宁 810016;
4. 天水师范学院甘肃省农业固体废弃物资源化利用重点实验室, 甘肃天水 741000;
5. 中国科学院大学, 北京 100049;
6. 青海省水文水资源勘测局, 青海西宁 810001

通讯作者: 周华坤, 马真
作者简介:李京蓉(1994-),女,青海民和人,硕士研究生,主要从事草地生态恢复研究,E-mail:350440948@qq.com
基金资助:
青海省自然科学基金项目（2016-ZJ-910；2015-ZJ-919Q）；省部共建三江源生态与高原农牧业国家重点实验室开放研究项目（2017-KF-02；2017-ZZ-11），青海省创新平台建设专项（2017-ZJ-Y20，2016-ZJ-Y01）；国家自然科学基金项目（31672475；31702163； 31600335）；2017年度青海三江源生态保护和建设二期工程科研和推广（2017-S-1）资助

Abstract

Abstract:

In this study, six forage grasses cultivated in alpine region were selected to evaluate their seed germination and seedling drought resistance. The effects of drought stress on physiological indexes of six grasses on seed germination and seedling stage were studied by PEG simulation of water stress and continuous drought. The main conclusions of this study were as follows:In seed germination period, low PEG concentration (5%) promoted seed germination, and high PEG concentration significantly inhibited seed germination rate. At the seedling stage, seedlings treated by successive drought and the relative water content, malondialdehyde content, soluble sugar content and chlorophyll content of the physiological indexes were measured.Two periods of membership value comprehensive analysis found that the drought resistance of six grasses was in following order: Alopecurus pratensis > Bromus inermis > Elymus breviaristatus > Roegneria pauciflora > Roegneria grandiglumis > Agropyron cristatum

Key words: Drought, Germination period, Seedling stage, Physiological index, Drought resistance

摘要：

本研究选择在高寒地区种植多年的6种禾本科牧草，对其进行种子萌发期和苗期抗旱性试验。用PEG模拟水分胁迫及连续干旱法来研究干旱胁迫对种子发芽率及种子幼苗期生理指标的影响，以此来综合评价六种禾本科牧草的抗旱性强弱。种子萌发期研究结果表明，5%的PEG浓度有效促进种子萌发，高PEG浓度显著抑制种子发芽率。经连续干旱胁迫法处理的苗期牧草，测定其相对含水量、丙二醛含量、可溶性糖含量和叶绿素含量四项生理指标。对两个时期隶属值综合分析可知，六种牧草的抗旱性强弱为：草原看麦娘（Alopecurus pratensis） > 无芒雀麦（Bromus inermis） > 同德短芒披碱草（Elymus breviaristatus） > 同德贫花鹅观草（Roegneria pauciflora） > 大颖草（Roegneria grandiglumis） > 扁穗冰草（Agropyron cristatum）。

关键词: 干旱, 萌发期, 苗期, 生理指标, 抗旱性

CLC Number:

S152.481

LI Jing-rong, ZHOU Xue-bing, MA Zhen, LIU Ze-hua, SHI Guo-xi, WANG Wen-ying, ZHANG Zhong-hua, GUO Mei-ling, YAO Bu-qing, ZHANG Chun-hui, MA Li, ZHOU Hua-kun. Research and Evaluation on Drought Resistance of Six Grasses in High-cold Pastoral Area[J]. Acta Agrestia Sinica, 2018, 26(3): 659-665.

李京蓉, 周学斌, 马真, 刘泽华, 石国玺, 王文颖, 张中华, 郭美玲, 姚步青, 张春辉, 马丽, 周华坤. 6种高寒牧区禾本科牧草抗旱性研究与评价[J]. 草地学报, 2018, 26(3): 659-665.

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Research and Evaluation on Drought Resistance of Six Grasses in High-cold Pastoral Area

6种高寒牧区禾本科牧草抗旱性研究与评价

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