芒颖大麦草种子休眠类型及破除方法的初步研究  

Primary investigation on seed dormancy and dormancy breaking of Hordeum jubatum

作　　者：赵傲雪 张晓娟[2] 刘慧慧[1] 曾彦军[1,3] 

机构地区：[1]兰州大学草地农业科技学院,甘肃兰州730020 [2]兰州大学公共卫生学院,甘肃兰州730000 [3]草地农业生态系统国家重点实验室,甘肃兰州730020

出　　处：《草业科学》2016年第11期2248-2253,共6页Pratacultural Science

基　　金：兰州大学2016年"本科教学工程"国家级大学生创新创业训练计划(201610730006)

摘　　要：以采集于甘肃省临泽县境内的芒颖大麦草（Hordeum jubatum）种子为材料,测定了种子的休眠率,并研究了去除种柄、预先冷冻、预先干热、硝酸钾（KNO_3）、赤霉素（GA3）、蒸馏水浸种和开水浸种7种处理方法破除休眠的效果。结果显示,参试种子的休眠率为73%~77%。预先冷冻、预先干热、KNO_3、GA3和蒸馏水浸种均能显著降低参试种子的休眠率（P〈0.05）,但以预先冷冻和GA3溶液预湿发芽床两种处理的效果为最好。预先冷冻和GA3处理后种子的萌发率和萌发指数达到最大值,分别为92%、89%和39.80、42.99;平均萌发时间为最小值,分别为2.43和3.10d。去除种柄和开水浸种均未能有效破除种子休眠（P〉0.05）。综上分析认为,参试种子休眠属于轻度生理休眠。Seed dormancy and the effects of seven treatments including removing seed stalk,pre-chilling,preheating,potassium nitrate（KNO_3）,gibberellic acid（GA3）,soaking in distilled water and soaking in boiled water on breaking seed dormancy of Hordeum jubatumcollected in Linze County,Gansu Province,China were investigated.The results showed that the dormancy percentages of tested seeds were 73%~77%.Treatments of pre-chilling,pre-heating,KNO_3,GA3 and soaking in distilled water significantly improved（P〈0.05）germination of tested seeds and pre-chilling and GA3 treatments had the best effects.After pre-chilling and GA3 treatments,seed germination percentage and germination index reached highest which were 92%,89% and42.99,39.80,respectively,mean germination time were the shortest which were 2.43 and 3.10 d,respectively.Both treatments of removing seed stalk and soaking in boiled water did not improve seed germination anyways.The tested seeds had non-deep physiological dormancy.

关 键 词：芒颖大麦草 种子休眠 休眠破除 萌发 

分 类 号：S543.9[农业科学—作物学]