Effects of different treatments on softwood cutting propagation of four species of Ulmus
With Ulmus pumila L.,Ulmus macrocarpa Hance,Ulmus glaucescens Franch,Ulmus pumila cv.jinye,the softwood cutting experiment of four species of trees were studied on different substrates,length of cuttings and processing times and treated with ABT rooting powder as exogenous hormones.By using the L16(44) orthogonal test design in a greenhouse with a system with full exposure and automatic intermittent spray.The species was the dominant factor on the rooting rate,and followed by the cutting length.The substrates had the least impact on rooting rates.There was significant difference in rooting rates,average rooting lengths,average rooting numbers and the root effect indexes among four species.Ulmus pumila L.had the highest rooting rate,and followed by Ulmus pumila cv.jinye,the last one is Ulmus glaucescens Franch.The rooting rates of 5 cm were the highest,reaching 55.8％,but its root effect index was the lowest,which was only about 0.003.The rooting rates with the increasing of hormone treatment time present a trend of rise first and then fall,and the rooting rates were at the highest when at 5 min and treated with 1 500 mg/L ABT rooting powder,which was 1.46 times higher than the clear water.There was no significant difference in rooting rates and rooting characteristics of other cuttings treated with different substrates.When used the species Ulmus pumila L.,substrates of perlite:turfy soil is 8:2 compound,and the length is 20 cm,and with the 1 500 mg/L rooting powder treatment 30 min,finally can obtain the finest preferable cutting propagation technical conditions,the rooting rate and the root effect index were 78.7％ and 0.019 respectively.
softwood cuttingUlmus L.rooting rateroot effect index
NETL
NSTL
万方数据
维普
