摘要
出苗与建植难是限制紫花苜蓿(Medicago sativa)在黄土高原干旱雨养区栽培利用的一个重要因素。种子引发技术可促进种子萌发和幼苗生长、提高种子活力、增强幼苗抗性,从而提高幼苗建植率。基于此,本研究以陇东苜蓿为材料,探讨了种子引发温度(10、15、20℃)、引发时间(12、24、36、48h)以及加水量(原始种子质量的90%、120%、150%)对种子引发效果的影响。结果表明,在多数条件下引发能显著提高苜蓿种子的萌发速率,促进幼苗生长,但对种子最终萌发率没有影响。当引发加水量为种子初始重的90%、引发温度为10℃、引发时间为36h时种子的活力指数最高,可作为紫花苜蓿种子引发的最适条件。
Failure of seedling establishment is one of the main reason limiting cultivation of Medicago sativain arid rain-fed region of Loess Plateau.Seed priming has been proven to be an effective method for enhancing stress tolerance of seeds at the germination stage;and consequently increased seedling establishment.This study determined the optimal conditions for hydropriming of M.sativacv.＂Longdong＂by manipulating priming temperature（10,15,20 ℃）,duration（12,24,36,48h）and water addition（90%,120%,150% seed weight）.The results showed that most priming treatments could significantly increased germination rate and seedling growth,but showed no effect on final germination percentage.The optimal response to hydropriming was achieved at 10 ℃for 36 hwith 90% water of original seed weight.
出处
《草业科学》
CAS
CSCD
北大核心
2016年第4期669-673,共5页
Pratacultural Science
基金
公益性行业(农业)科研专项(201403048-3)
甘肃省重大科技攻关项目(2013GS05907)
关键词
紫花苜蓿
水引发
回干
种子萌发
Medicago sativa：hydropriming
redry
seed germination
