中国草食动物科学2026，Vol.46Issue(3)：26-37,12.DOI:10.3969/j.issn.2095-3887.2025.00.081
不同饲用燕麦品种种子萌发期抗旱能力评价
Evaluation of Drought Resistance of Different Forage Oat Varieties during Seed Germination Stage
摘要
Abstract
To investigate drought resistance of forage oats during germination stage,four forage oat varieties,including Avena sativa cv.Zhongyan No.1,Avena sativa cv.Longyan No.3,Avena sativa cv.Danmai No.440,Avena sativa cv.Baiyan No.7,were selected as experimental materials.Germination tests were conducted using the between-paper method,and drought stress was artificially simulated with polyethylene glycol-6000(PEG-6000)solutions at concen-trations of 10％,15％,20％,and 25％,with distilled water serving as the control(CK).The influence of drought stress on germination rate,seedling length,longest initial root,and key physiological parameters of the tested oat varieties was systematically examined.The results showed that,compared with the control(CK),the germination rate of the tested oat varieties was significantly reduced(P<0.05)under 15％PEG-6000 treatment.In contrast,no significant dif-ference was observed under 10％PEG-6000 treatment(P>0.05),and seeds failed to germinate normally under 20％and 25％PEG-6000 treatments.Therefore,15％PEG-6000 was identified as the sensitive stress concentration for dis-tinguishing the germination responses of the tested oat seeds under drought stress.Furthermore,with increasing PEG-6000 concentration,seedling length,longest initial root,relative germination rate,seedling drought tolerance coeffi-cient,and primary root drought tolerance coefficient all exhibited a decreasing trend.However,the contents of soluble sugars(SS),soluble proteins(SP),and proline(PRO)increased progressively,whereas the activities of superoxide dis-mutase(SOD),catalase(CAT),and peroxidase(POD)showed variable patterns depending on the variety and treatment.Compared with CK,PEG-6000 treatments significantly increased SP and malondialdehyde(MDA)content in the tested varieties(P<0.05),and significantly enhanced POD,CAT,and SOD activities in Zhongyan No.1 and Danmai No.440(P<0.05).Based on the comprehensive evaluation using membership function analysis,the drought resistance of the tested oat varieties ranked as follows:Zhongyan No.1>Danmai No.440>Baiyan No.7>Longyan No.3.These re-sults indicated that Zhongyan No.1 possessed superior drought tolerance and was suitable for cultivation and promotion in arid and semi-arid regions.关键词
饲用燕麦/PEG-6000胁迫/萌发期/隶属函数评价Key words
forage oats/PEG-6000 stress/germination stage/membership function method evaluation分类
农业科技引用本文复制引用
吴芳,胡宇,王小玲,张静,杨倩倩,申佳寿,杨红善,段慧荣,崔光欣..不同饲用燕麦品种种子萌发期抗旱能力评价[J].中国草食动物科学,2026,46(3):26-37,12.基金项目
新疆维吾尔自治区重大科技专项(2024A02003-5) （2024A02003-5）
中国农业科学院基本科研业务费专项(1610322023017) （1610322023017）
新疆维吾尔自治区科技支疆项目计划(指令性)项目(2024E02024) （指令性）
