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 seedlingsgrowth of two turfgrass species

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。

Abstract:

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.