1 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。 1 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.