乙烯利对两种草坪草种子萌发及幼苗生长的影响  

Effects of ethephon on seed germination and seedlings growth of two turfgrass species

作　　者：程锦 单旭东 李丽菁 高娅楠 张智韦 许立新[1] CHENG Jin;SHAN Xu-dong;LI Li-jing;GAO Ya-nan;ZHANG Zhi-wei;XU Li-xin(College of Grassland Science,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学草业与草原学院,北京100083

出　　处：《草原与草坪》2020年第4期61-66,共6页Grassland and Turf

基　　金：中央高校基本科研业务费专项资金资助(2020CXY001)。

摘　　要：以多年生黑麦草品种Neruda和日本结缕草品种Zenith的种子为材料,用0、150、250和350 mg/L 4种浓度乙烯利溶液进行浸种处理后,测定了种子萌发指标(发芽率、发芽势、发芽指数、活力指数)和幼苗生长指标(根鲜重、苗鲜重、苗长、根长、根冠比)。结果表明:两种草坪草对乙烯利处理浓度的响应模式不同,能够提高多年生黑麦草和日本结缕草种子发芽率、发芽势、发芽指数和活力指数的乙烯利浓度分别是250、350 mg/L。与对照相比,250 mg/L乙烯利处理可促进多年生黑麦草苗、根的平均长度,并提高多年生黑麦草幼苗的根冠比;150 mg/L乙烯利处理可以提高日本结缕草幼苗的根冠比;350 mg/L处理可提高多年生黑麦草与日本结缕草的苗长。In this study,seeds of perennial ryegrass cultivar’Neruda’and zoysiagrass cultivar’Zenith’were used as materials.After being soaked in four concentrations of ethephon solution:0,150,250,and 350 mg/L,the seed germination indexes(germination rate,germination potential,germination index,and vigor index)and indexes of seedings growth(root fresh weight,seedling fresh weight,seedling length,root length,and root-shoot ratio)were investigated and analyzed.The results showed that the response patterns of two turfgrass to ethephon treatment were different,250 and 350 mg/L ethephon treatment increased the germination rate,germination potential,germination index,and vigor index of perennial ryegrass and zoysiagrass seeds respectively.Compared with the control,ethephon treatment at 250 mg/L could increase the average length of seedling and root in perennial ryegrass,and also the root-shoot ratio;ethephon treatment at 150 mg/L could increase the root-shoot ratio of zoysiagrass seedlings;350 mg/L treatment increased the seeding length of perennial ryegrass and zoysiagrass.The effect of higher concentration of ethephon treatment on the related indexes of two turfgrass species needs further study.

关 键 词：草坪草 乙烯利 浸种 种子萌发 幼苗生长 

分 类 号：S767.3[农业科学—森林保护学]