不同浓度生根粉对甘薯芽苗生根及扦插存活率的影响  

Effects of different concentrations of rooting powder on rooting and cutting survival rate of sweet potato bud seedings

作　　者：张杰[1] 朱杰 宿秀丽[1] 龚洪波 吴山 ZHANG Jie;ZHU Jie;SU Xiu-li;GONG Hong-bo;WU Shan(Xiangyang Academy of Agricultural Sciences,Xiangyang 441057,Hubei,China;Xiangyang Agricultural Technology Extension Center,Xiangyang 441057,Hubei,China)

机构地区：[1]襄阳市农业科学院,湖北襄阳441057 [2]襄阳市农业技术推广中心,湖北襄阳441057

出　　处：《湖北农业科学》2023年第12期29-32,共4页Hubei Agricultural Sciences

基　　金：襄阳市研究与开发项目(2021AAA003316)。

摘　　要：以甘薯[Ipomoea batatas(L.)Lam.]品种普薯32号为研究对象,通过不同配比、不同浓度生根剂处理甘薯芽苗,研究不同处理对甘薯芽苗生根时间、生根数量、根长度及扦插存活率的影响。结果表明,IBA(吲哚丁酸)+NAA(萘乙酸)、ABT(生根粉)和清水处理均能使甘薯芽苗快速生根,而ABT浓度超过25 mg/L对甘薯芽苗生根会有一定的抑制作用,从而降低生根数量。当甘薯芽苗生根数量随着ABT剂量增加而减少时,单根长度不会出现明显变长的现象,根总长度与生根数量整体呈正相关。甘薯芽苗生根后扦插可显著提升芽苗的存活率,各生根剂处理芽苗存活率均高于清水对照;甘薯芽苗的存活率与芽苗生根数量和根总长度有一定的关联。Taking the sweet potato bud seedlings of Pushu 32 as the research object,the effects of different treatments on the rooting time,rooting number,root length and cuttage survival rate of sweet potato bud seedlings were studied by different ratios and concentra⁃tions of rooting agents.The results showed that IBA(indole butyric acid)+NAA(naphthylacetic acid),ABT and water treatment could all promote rapid rooting of sweet potato shoots.When the concentration of ABT was more than 25 mg/L,it would inhibit the root⁃ing of sweet potato bud seedlings to a certain extent,thus reducing the number of roots.When the rooting number of sweet potato bud seedlings decreased with the increase of rooting agent dosage,the single root length did not become longer obviously,and the total root length was positively correlated with the rooting number as a whole.Cuttage of sweet potato bud seedlings after rooting could signifi⁃cantly improve the survival rate of sweet potato bud seedlings,and the survival rate of bud seedlings treated with each rooting agent was higher than that of the control(clean water).The survival rate of sweet potato bud seedlings was related to the rooting number and total root length of sweet potato seedlings.

关 键 词：生根粉 甘薯[Ipomoea batatas(L.)Lam.] 根长 生根条数 扦插存活率 

分 类 号：S531[农业科学—作物学]