根外追肥指对果树叶面喷肥,其好处是。肥效快(一般5个小时。最迟24小时即被吸收)、利用率高、省肥、省工、成本低,对于根系吸收能力低的弱树尤其重要,但根外追肥不能代替土壤施肥.根外追肥的时间应在上午10点钟前或下午4点以后,喷肥部位要喷在叶片反面才有利于吸收。关于果树根 Fertilizer root refers to foliar fertilizer on the foliage, the benefits are. Fertilizer efficiency (usually 5 hours. The latest 24 hours to be absorbed), high utilization, fertilizer, labor, low cost, weak roots for the absorption of weak trees is particularly important, but the top dressing can not replace the soil fertilization. Root top dressing time should be before 10 o’clock in the morning or after 4 o’clock in the afternoon, spray parts to spray the opposite side of the blade is conducive to absorption. About fruit tree roots