摘要
纳罗克非洲狗尾草(Setaria sphacelata cv.Narok)是南方草地建设和环境治理的骨干禾草,推广前景十分广阔。但其种子产量低,品质差,休眠严重,严重制约了该品种的推广利用。以滇产纳罗克非洲狗尾草种子为试验材料,采用GA3、IBA、6-KT、ETH溶液进行浸种处理,结果表明4种激素均可打破种子休眠,促进种子萌发和幼苗生长。其中,400 mg·L-1GA3溶液浸种24 h效果最好,种子各项活力指标均显著高于对照(P<0.05)。其发芽势、发芽率、发芽指数和活力指数分别为48%、54%、19.46和0.015 2,分别较对照提高1.18、1.08、1.31和1.14倍。ETH溶液浸种的效果仅次于GA3,以450μL·L-1ETH溶液浸种24 h为好,而IBA和6-KT的效果一般,但20mg·L-1IBA、5 mg·L-16-KT溶液浸种24 h,对促进纳罗克非洲狗尾草种子的萌发仍有显著作用(P<0.05)。
Setaria sphacelata cv.Narok is one of the most prominent forages applied in grassland construction and environmental treatment in southern China,which has broad promotion prospects.However,the low seed yield,poor quality and deep dormancy restrict the popularization and utilization of this forage.Soaking treatment with exogenous hormones including GA3,IBA,6-KT and ETH were applied to break dormancy of Narok seeds from Yunnan Province.The results showed that all of these four different exogenous hormones could break Narok seed dormancy and promote seed germination and seedlings growth with different effects.The treatment with 400 mg·L- 1GA3 soaking for 24 h was the best.The germination energy,germination percentage,germination index and the vigor index was 48%,54%,19.46 and 0.015 2,respectively,and increased by 1.18 times,1.08 times,1.31 times and 1.14 times compared with the control,respectively.These indices were significantly higher( P < 0.05)than the corresponding indices from control.Effects of the treatment with 450 μL·L- 1ETH soaking for 24 h was the second best.The treatments with 20 mg·L- 1IBA and 5 mg·L- 16-KT soaking for 24 h also had significant promoting effects( P < 0.05) on Narok seeds germination.
出处
《草业科学》
CAS
CSCD
北大核心
2015年第3期406-412,共7页
Pratacultural Science
基金
国家自然科学基金项目"纳罗克非洲狗尾草种子休眠机理及解除方法研究"(31260582)
