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油松是北方习见的常绿针叶树种,贺兰山有天然分布。树姿美观、枝叶苍翠、适应性强,石嘴山市近年大量移植作为公共绿化和庭院绿化树种。由于种源缺乏,长途运输带土球的大树土球易碎,耗资费力,成活率低,我们自1982年采用带冻土球移植的方法移植油松大树,三年来移植1427株平均成活率95％,叶色浓绿,长势良好,为我市移栽常绿树,“四季有青”开辟了新途径,现将移裁技术介绍如下。一、由于栽植时间在封冻季节,冻层厚达8～120厘米,挖坑很费工,因此需在封冻前挖好定植坑。定植坑一般长、宽各1米,深0.8～1米,使根系处在土壤下层相对恒温层。挖坑时取出的土放置一侧,防止见水,以免冻结,坑底加施适量羊粪,增加养分,再覆盖10～20厘米表土。
Pinus tabulaeformis is an evergreen coniferous species seen in the north, with natural distribution in Helan Mountain. Shuzi beautiful, green branches and leaves, adaptability, Shizuishan City in recent years a large number of transplant as a public afforestation and garden tree species. Due to the lack of provenances, the earthball of long-distance transportation earthballs is fragile, costly and has a low survival rate. Since 1982, we have used the method of transplanted soil with frozen earthballs to transplant large tree trees. In the past three years, the average survival rate of 1427 Rate of 95% dark green leaves, growing well, for the city transplanting evergreen trees, “Four Seasons Green” has opened up new ways, the technology will now be introduced as follows. First, due to planting time in the freezing season, frozen layer thickness of 8 to 120 cm, digging a lot of work, it is necessary to dig well before freezing pit. Planting pit generally long, wide 1 meter, 0.8 to 1 meter deep, so that the roots in the soil under the relative constant temperature layer. When digging out of the soil placed on the side, to prevent water see, in order to avoid freezing, bottom plus appropriate amount of sheep manure, increase nutrients, then cover 10 to 20 cm of topsoil.