岩棉育苗块持水量对番茄幼苗生长的影响

Effect of Water Capacity of Rock Wool Block on the Growth of Tomato Seedlings

设施土壤次生盐渍化和连作障碍日益严重,岩棉无土栽培是解决诸类问题的途径之一。以＂双抗1号＂番茄品种为试材,在日光温室条件下,研究了岩棉块育苗期间不同相对持水量（30%、40%、50%、60%、70%）对番茄幼苗株高、茎粗、鲜重、干重的影响。结果表明：较高的岩棉块持水量对番茄幼苗株高有明显的促进作用;育苗结束时不同持水量处理对番茄幼苗茎粗的影响差异不显著;较高持水量处理能显著增加番茄幼苗地上部鲜重和干重,能明显促进根系生长,增加岩棉育苗块底面的根系密度。初步建议岩棉块培育番茄苗时宜采用60%～70%相对持水量。

Secondary salinization and soil sickness in greenhouse soil is increasing seriously,rock wool soilless culture is one of the ways to solve the problem.The effect of different relative water capacity（30%,40%,50%,60%,70%）of rock wool block on the growth of tomato seedlings height,stem diameter,fresh weight,dry weight were studied by using the tomato cultivar‘Shuangkang No.1＇as experiment material in greenhouse.The results showed that high water capacity of rock wool block had obviously increased the tomato seedlings plant height.Tomato seedlings stem diameter was no significant between the different treatments at the end of the seedlings nurse.High water capacity treatment could significantly increase the over ground fresh weight and dry weight of tomato seedlings,significantly promote root growth,increase root density at the rock wool block underside.60%-70% of rock wool block relative water capacity could be used to tomato seedlings nurse in tomato rock wool soilless culture.