春季是果树萌芽、开花的时节,这时果树需大量的营养物质,因此春季施肥很关键,多数果农也习惯在春季追肥。但春季追肥应注意发生肥害。1肥害的发生症状施肥后1~2周发现树体大枝或整树的嫩叶及芽萎缩、干枯,花及幼果萎缩脱落,背部条状树皮出现水渍状溃烂,严重时整个大枝全部死亡甚至整个树体死亡,造成严重损失。2肥害发生的原因主要是肥料烧根。而多数果农只注重表面现象,以 Spring is the fruit tree budding, flowering season, when the fruit trees need a lot of nutrients, so spring fertilization is the key, most farmers are also used to dressing in the spring. However, fertilizer should pay attention to the occurrence of fertilizer in spring. Symptoms of fatal disease 1 to 2 weeks after fertilization, the young leaves and buds of large branches or whole trees of the tree were found to be atrophied, withered and withered, flowers and young fruits atrophied and exfoliated, water-like ulceration appeared on the back strip-shaped bark, and all the big branches died Even the entire tree died, causing serious damage. 2 The main reason for fatal fertilizer burning roots. However, most fruit growers only focus on the surface phenomena