不同处理方式对蒙古栎压条生长和生根性状的影响

Effects of Different Treatments on Growth and Rooting Characteristics of Quercus mongolica Layering Breeding

以蒙古栎当年生枝条为穗材,采用不同种类和浓度的外源生长物质、不同基质及不同压条方式作为试验处理,测定并分析穗材生长量、生物量和生根性状,旨在筛选最优外源生长物质的种类和浓度、基质组成及压条方式。结果表明:吲哚丁酸钾和ABT1对蒙古栎压条穗材生根均具有明显的促进作用,但存在一定差异。10000 mg/L ABT1的根、茎、叶和单株等生物量分别是5000 mg/L吲哚丁酸钾的4.07倍、1.57倍、1.29倍和1.48倍,生根率、生根量和最长根长分别是5^(#)处理的1.9倍、3.16倍和1.47倍,偏根率仅为38.79%。因此ABT1更适宜作为蒙古栎压条穗材生根的促进剂,其10000 mg/L浓度处理穗材时,生根率、生根量和最长根长分别达到了23.84%、7.05条和16.71 cm。14^(#)处理的株高、地径、茎生物量、叶生物量、单株生物量、生根率、最长根长和偏根率等指标均优于其他基质处理,为蒙古栎压条较适宜的基质。横缢处理组均生根,而非横缢处理组均不生根,表明横缢对蒙古栎压条穗材生根非常重要。采用直立压条方式的株高、地径、根生物量、茎生物量、叶生物量、单株生物量、生根率、生根量和最长根粗等指标均高于倒伏压条方式,直立压条为蒙古栎适宜压条方式。

With the branches of Quercus mongolica as panicle materials,different kinds and concentrations of exogenous growth substances,different substrates and different layering patterns were applied to determine and analyze the panicle material growth,biomass and rooting characteristics in order to select the optimal exogenous growth substance species and concentrations,substrate composition and layering methods.It was revealed that both potassium indolebutyrate and ABT1 significantly promoted the rooting of layered panicle material of Q.mongolica,but there were some differences.The biomass of roots,stems,leaves and single plants treated with 10000 mg/L ABT1(12^(#))were 4.07 times,1.57 times,1.29 times and 1.48 times,respectively that of those treated with 5000 mg/L potassium indolebutyrate(5^(#)).The rooting rate,rooting amount and longest root length were 1.9 times,3.16 times and 1.47 times higher than those treated with 5#,respectively.Moreover,the partial root rate of those undergoing 12#treatment was only 38.79%.It was noted that ABT1 was more suitable as a rooting accelerator for layered panicle materials of Q.mongolica and the rooting rate,rooting amount and longest root length of layered panicle materials of Quercus mongolica reached 23.84%,7.05 and 16.71 cm,respectively when treated with 10000 mg/L.The plant height,ground diameter,stem dry weight,leaf dry weight,biomass per plant,rooting rate,longest root length and partial root rate of those undergoing 14^(#) treatment(the mixture of river sand and garden soil in equal volume ratio as the substrate)were superior to those treated with other substrates.Thus,it was a suitable substrate for Q.mongolica layering.Those in the transverse stricture treatment group rooted,but not in the nontransverse stricture treatment group,indicating that the transverse stricture was very important for the rooting of layered panicle material of Q.mongolica.The plant height,ground diameter,root dry weight,stem dry weight,leaf dry weight,single plant biomass,rooting rate,rooting amount and longest root diameter of those treated with upright layering method(4^(#) treatment)were higher than those treated with lodging layering method(15^(#) treatment).Therefore,upright layering is suitable for layering of Q.mongolica.