果树根外追肥是利用果树地上部位器官也能吸收营养元素的特性,用喷雾法将一定浓度的肥液喷到树冠上,由枝条和叶片吸收营养的方法。根外追肥在果树生产上应用范围很广,如果树缺乏某些营养元素时,叶面喷施效果最好;为了改善树体的营养状况,可在生长期多次喷施各种营养元素,以满足抽梢、开花、结果的需要;果树谢花后的幼果期和果实膨大期,需要大量养分,在根系供应不足时采用叶面追施,可减少落花落果,并能壮果和提高果实品质;由于土壤结构不良,根系受伤或其它自然灾害引起 Fruit tree root top dressing is the use of fruit trees aboveground organs can also absorb the characteristics of nutrients, the spray method will be a certain concentration of fertilizer sprayed onto the canopy, by the branches and leaves absorb nutrients. Root top dressing application in a wide range of fruit production, if the tree is lack of certain nutrients, the best foliar spray; in order to improve the nutritional status of trees, can be sprayed in the growing season many times a variety of nutrients, In order to meet the needs of shoots, flowering, the results; fruit trees Xiehua after the young fruit and fruit enlargement period, requires a lot of nutrients, the lack of supply in the root system when the use of foliage, can reduce the fall and fall fruit, and strong fruit and improve Fruit quality; due to poor soil structure, root injury or other natural disasters