不同激素种类、浓度及浸泡时间对金蒲桃扦插生根的影响

Effects of Different Hormone Types, Concentrations and Soaking Time on Cutting Rooting of Xanthostemon chrysanthus

以金蒲桃半木质化枝条作为插穗,以黄心土+砂(1∶1)为基质,通过正交试验针对不同激素种类、浓度以及浸泡时间等因素研究金蒲桃扦插生根的效果,从而获得最适宜金蒲桃扦插生根的处理,为其扦插繁殖提供理论基础和技术支持。结果表明:金蒲桃以皮层组织生根为主,较好的处理插穗成活率超过90%,激素浓度是影响金蒲桃扦插生根最主要的因素,其次是激素种类,浸泡时间的影响最小。极差分析结果发现,扦插生根率最适合的因素组合A2B2C3(500 mg/LIBA浸泡2 min)或A2B3C1(200 mg/LIBA浸泡30 min),扦插生根数量最适合的因素组合为A1B1C1(1000 mg/LNAA浸泡30 min),扦插生根平均根长最适合的因素组合为A3B3C2(200 mg/L"根太阳"生根剂浸泡10 min),最适合扦插生根最长根长的因素组合为A2B1C2(1000 mg/LIBA浸泡10 min),最适合扦插生根效果指数的因素组合为A1B1C1(1000 mg/LNAA浸泡30min)。主成分分析联合生根效果指数指标极差分析结果表明,A1B1C1(1000 mg/LNAA浸泡30 min)和A1B2C2(500 mg/LNAA浸泡10 min)是适宜金蒲桃扦插较好的组合。总之,金蒲桃是一种扦插相对比较容易的植物,该研究结果可为生产中金蒲桃的扦插繁殖提供参考。

Taking semi-lignified branches of Xanthostemon chrysanthus as the cutting and loess+sand(1∶1) as the substrates, the effects of different hormone types, concentrations and soaking time on the rooting of X. chrysanthus cuttings was studied by the orthogonal experiment. The most suitable treatment for the rooting was obtained, which would providea theoretical basis and technical support for its cutting propagation. The rooting was mainly in the cortical tissue. The survival rate of cuttings was over 90%. Hormone concentration was the most important factor affecting the rooting, followed by hormone types, and soaking time had the least effect. Range analysis showed that the most suitable factor combination for cutting rooting rate was A2B2C3(500 mg/L IBA soaked for 2 minutes) or A2B3C1(200 mg/L IBA soaked for 30 minutes). The most suitable combination for cutting rooting number was A1B1C1(1000 mg/L NAA soaked for 30 minutes), and A3B3C2(200 mg/L "Gentaiyang" rooting agent soaked for 10 minutes) was the most suitable for cutting rooting length, the most suitable combination for longest rooting length was A2B1C2(1000 mg/L IBA soaked for 10 minutes), and the most suitable combination for cutting rooting index was A1B1C1(1000 mg/L NAA soaked for 30 minutes). The results of principal component analysis combined with range analysis of rooting effect index showed that A1B1C1(1000 mg/L NAA soaked for 30 minutes) and A1B2C2(500 mg/L NAA soaked for 10 minutes) were the better combination for survival and rooting. In a word, X. chrysanthus was a plant relatively easy to be used as cuttings. The experimental results could provide a reference for cutting propagation of X. chrysanthus in future production.