不同浸种条件对球花含笑播种出苗的影响  

Effects of Different Soaking Conditions on Seeding Emergence of Michelia sphaerantha C.Y.Wu

作　　者：杨美荣 冯丽娜 苏嗣杰 杨新 王冬梅 黄丽娟 张雁东 Yang Meirong;Feng Lina;Su Sijie;Yang Xin;Wang Dongmei;Huang Lijuan;Zhang Yandong(Dali Institute of Forestry and Grassland Science,Dali 671000,China)

机构地区：[1]大理州林业和草原科学研究所,云南大理671000

出　　处：《中国野生植物资源》2023年第5期50-54,共5页Chinese Wild Plant Resources

基　　金：云南省林业科技推广示范项目(2019TS04)。

摘　　要：目的:球花含笑是云南特有珍贵树种,绿化观赏性佳,为解决其播种育苗中出苗率不高、出苗缓慢问题,研究了不同浸种条件对其播种后出苗率、出苗起始时间、出苗持续时间的影响,找出适宜的浸种条件。方法:采用单因素试验比较萘乙酸(NAA)、赤霉素(GA_(3))、等浓度等体积赤霉素和萘乙酸混合液(1GA3∶1NAA)浸种对出苗的影响;采用全因素试验比较不同浸种条件:NAA浓度(300 mg/L、500 mg/L、700 mg/L),浸种时间(12 h、24 h),温度(20℃、30℃)对出苗的影响。结果:单因素试验在激素浓度500 mg/L,时间12 h,温度20℃条件下,使用激素NAA浸种出苗率高,出苗起始时间早,出苗持续时间短。全因素试验使用激素NAA浸种,浓度500 mg/L,时间12 h,温度20℃出苗率最高;NAA浓度700 mg/L,时间12 h,温度20℃出苗起始时间最早;NAA浓度500 mg/L,时间24 h,温度20℃出苗持续时间最短。结论:为提高球花含笑出苗的效率,使用激素NAA浓度500 mg/L,时间12 h,温度20℃为最适宜浸种条件。Objective:Michelia sphaerantha C.Y.Wu is a precious species in Yunnan,having great value of greening and viewing.In order to solve the problems of its low emergence rate and slow seeding emer-gence,the effects of different soaking conditions on the seeding emergence rate,starting time and dura-tion were studied,and then found out suitable soaking conditions.Methods:A single factor experiment was used to compare the effects of soaking seeds with gibberellin(GA3),naphthylacetic(NAA),and a mixture of equal concentration and volume of gibberellin and naphthylacetic(1 GA_(3)∶1NAA)on seeding emer-gence.All factors experiment was used to compare the effects of different soaking conditions:NAA concen-tration(300 mg/L,500 mg/L,700 mg/L),time(12 h,24 h),temperature(20℃,30℃)on seeding emer-gence.Results:In the single factor experiment,under the conditions of hormone concentration of 500 mg/L,time of 12 hours,and temperature of 20℃,the germination rate of seeds soaked with hormone NAA was high,the initial time of emergence was early,and the duration of emergence was short.The full factor ex-periment used the hormone NAA to soak seeds,with a concentration of 500 mg/L,a time of 12 hours,and a temperature of 20℃,with the highest emergence rate;The earliest starting time of seedling emergence is under the condition of NAA concentration of 700 mg/L,time of 12 hours,and temperature of 20℃;The NAA concentration is 500 mg/L,the time is 24 hours,and the temperature is 20℃,with the shortest duration of seedling emergence.Conclusion:In order to improve the seeding emergence efficiency of Mi-chelia sphaerantha,NAA 500 mg/L,24 h,20℃was most suitable soaking condition.

关 键 词：球花含笑 浸种条件 出苗 

分 类 号：S722.1[农业科学—林木遗传育种]