不同预处理对红豆草种子萌发和幼苗生长的影响

Effects of different pretreatments on seed germinationand seedling growth of Onobrychis viciaefolia

摘要:

为减轻红豆草种子萌发过程中的发霉,提高种子发芽率,研究了不同预处理方式(剥皮+晒种、晒种、剥皮、烫种+剥皮、烫种)对红豆草种子萌发及幼苗生长情况的影响。结果表明:剥皮+晒种、剥皮和剥皮+烫种处理均提高红豆草种子的发芽势、发芽率、发芽指数和活力指数;与对照相比,各处理均能显著抑制种子发霉,以剥皮和烫种处理效果最佳。烫种、剥皮和剥皮+晒种处理可显著提高红豆草幼苗株高,根长较对照差异不显著,晒种处理对地上生物量有增加效应,剥皮+晒种处理可增加地下生物量,但两种处理较对照均差异不显著。剥皮+晒种处理可显著提高根系平均直径,根系表面积和根系体积。综合而言,剥皮+晒种处理对红豆草种子的萌发和幼苗生长的促进效果均最好。

Abstract:

In order to reduce the mildew during seed germination and improve the germination rate,the effects of different seed pretreatments (removing peel + solarization,solarization,removing peel,scalding + removing peel,and scalding) on seed germination and seedling growth of Onobrychis viciaefolia were studied in this paper.The results showed that the germination potential,germination rate,germination index and vigor index of O.viciaefolia seeds were improved by the treatments of removing peel+solarization,removing peel,scalding+removing peel.Compared with the control,all treatments could significantly inhibit the seed mildew,and the effects of removing peel and scalding were the best.Scalding,removing peel,and removing peel+solarization treatments could significantly increase plant height,the aboveground biomass was increased by solarization treatment,and the underground biomass could be increased by removing peel + solarization treatment.but these two treatments were not significant compared with control.The average root diameter,root surface area,and root volume were significantly increased by removing peel + solarization treatment.In conclusion,removing peel + solarization treatment had the best promoting effect on seed germination and seedling growth of O.viciaefolia.