提高林木及果树的栽植成活率,除选用壮苗,加强幼树管理和保护外,还应抓好以下几项技术措施。 一、适时栽植。林木及果树栽植应在落叶后萌芽前,此期苗木处于休眠期,体内贮藏养分较多,蒸腾量较小,根系易恢复生长,故栽后成活率高。黄河以北,冬季严寒,冻土层深,秋植易发生“抽条”或枯死,以春季栽植比较适宜。 二、春季早栽。林木及果树在休眠状态下栽植,随土壤返浆和气温回升,有利于苗木的萌动。同时根系的再生能力强,伤口愈合快,缓苗时间 Improve the survival rate of trees and fruit trees planted, in addition to the selection of strong seedlings, saplings to strengthen management and protection, but also should grasp the following technical measures. First, timely planting. Trees and fruit trees should be planted before deciduous germination, seedling dormancy in this period, the body more storage of nutrients, less transpiration, the root system is easy to resume growth, so after transplanting survival rate. To the north of the Yellow River, the winter is cold, the permafrost layer is deep, the autumn planting is prone to “drawing” or withering, and the planting in spring is more suitable. Second, early spring planting. Trees and fruit trees planted in the dormant state, with the soil back to pulp and temperature rise, is conducive to seedling germination. At the same time the root regeneration ability, wound healing fast, Huanmiao time