水杉、池杉、落羽杉(以下简称“三杉”)均为优良的速生用材树种。近年来,在我省江南水乡、苏北平原和江、河、湖、滩两岸已广泛栽植造林。为了快速繁殖“三杉”苗木,不断满足林业建设高速度发展的需要,我圃于1979年秋,以蛭石为插壤,采用电子叶间歇喷雾方法进行全光秋插试验,取得了很好的效果。据插后40天调查,扦插成活率高达99％以上。 一、电子叶间歇喷雾原理和装置 电子叶间歇喷雾法就是通过一种电子叶随时将插穗叶面的水分变化情况,转变成微小的电信号输入电子继电器,而后利用电子管栅极电压的变化,经交流接触器,自动控制电动机线路通断,从而使水泵中的压力水流由输水管经喷头射出(我圃采用电动机带动水泵供水),雾化成极细的水滴,均匀的喷洒在叶面和插床上;当插穗 Metasequoia, Ipomoea, Taxodium distichum (hereinafter referred to as “fir”) are excellent fast-growing timber species. In recent years, afforestation has been widely planted in the Jiangnan Water Village, the Northern Jiangsu Plain and the banks of rivers, rivers, lakes and beaches in our province. In order to rapidly propagate the seedlings of “San-fir” and continuously meet the needs of high-speed development of forestry construction, I nursery in the autumn of 1979, using vermiculite as intercalation, using the electronic leaf intermittent spray method for all-optical autumn insertion test, and achieved good results . According to the investigation after 40 days of insertion, the survival rate of cutting reaches as high as 99%. First, the principle and device of intermittent spray of electronic leaves Intermittent spray of electronic leaves is through an electronic leaf at any time cut leaves of water changes, into a small electrical signal input electronic relay, and then use the tube gate voltage changes, the AC contactor, automatic control of the motor circuit off, so that the pressure water flow in the pump from the nozzle through the nozzle (I nursery motor driven water pump), atomized into fine droplets, spray evenly on the foliage and the bed When cuttings