任亚玲 1罗天 1薛森武 1韦梦迪 1黄翠碧 1龚芳1
作者信息
- 1. 贵州农业职业学院,贵州 贵阳 551400
- 折叠
摘要
Abstract
The experiment was to investigate the optimal germination conditions for forage sweet sorghum seeds under saline-alkali,drought,and high-boron stress conditions.Feed sweet sorghum seeds were treated with different concentrations of sodium chloride(NaCl),sodium carbonate(Na2CO3),sodium hydroxide(NaOH),polyethylene glycol-6000(PEG-6000),and boric acid,measured the germination rate,germination potential,germination index,vigor index,drought damage rate,radicle length,plumule length,fresh weight,dry weight,and seedling water content.The half-inhibitory concentration(salt tolerance threshold)and the limit concentration values were calculated.The results showed that compared to the control group,250 mmol/L NaCl,25 mmol/L Na2CO3,25 mmol/L NaOH,and 30%PEG-6000 significantly reduced the germination rate(P＜0.05).100 mmol/L NaCl,25 mmol/L Na2CO3,15 mmol/L NaOH,15%PEG-6000,and 2 mmol/L boric acid significantly reduced the plumule length(P＜0.05).5%and 10%PEG-6000 significantly increased the plumule length and radicle length(P＜0.05).The mean half-inhibitory concentrations for germination of forage sweet sorghum seed treated with NaCl,Na2CO3,NaOH,boric acid and PEG-6000 were 250.07,72.87,36.70,39.27 mmol/L and 23.57%,respectively.The study indicates that forage sweet sorghum seed are tolerant to salt(NaCl,Na2CO3),alkali(NaOH),and drought(PEG-6000),while seedlings are sensitive to boric acid.关键词
发芽率/饲用甜高粱/抗逆性/盐碱胁迫/干旱胁迫/高硼胁迫Key words
germination rate/forage sweet sorghum/stress resistence/saline-alkali stress/drought stress/high boron stress分类
农业科技
