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种植批杷的果农常常反映,有些果实在成熟后,果上局部发僵,果面布满青点,果肉僵硬,食味较差。还反映这种青僵果逐年增加,有的树几乎全部枇杷青僵。其实,枇杷果实青僵是因树体缺铜元素后形成的生理性病害。根据有关资料介绍:枇杷叶片含铜量65～15ppm 之间为正常,而小于5ppm 就会出现铜素缺乏症。铜素缺乏的树体,不仅成熟果实局部青僵。僵皮萎缩、粗糙;还有叶片变薄,叶面失绿等症状。枇杷为什么会缺铜?主要原因是土壤贫瘠,有机质和铜元素缺乏,不能满足枇杷对铜素的吸收需要。此外,如果施壅氮肥过多,因氮与铜有拮抗作用,也会影响铜元素的吸收。预防枇杷青僵病既抓基础管理;还要从幼果期开始做起:1、基础管理1)对于有机质缺乏的枇杷园,应以增施有机肥,或是采用园间套种豆类、藿香
Growing loquat farmers often reflect that, after some fruits mature, the fruit on the local stiff, fruit covered with green spots, stiff flesh, poor taste. It also reflects the increasing green young fruits, and some trees almost all loquats youthful. In fact, young stiff loquat fruit is due to lack of copper body after the formation of physiological diseases. According to the information: loquat leaf copper content between 65 ~ 15ppm normal, and less than 5ppm will appear copper deficiency. The lack of copper tree, not only ripe fruit local green stiff. Zombie atrophy, rough; there are thinning leaves, leaves and other symptoms of chlorosis. Why lack of loquat copper? The main reason is the poor soil, organic matter and lack of copper, can not meet the absorption of copper loquat needs. In addition, if too much nitrogen fertilizer Shi, nitrogen and copper antagonistic effect will also affect the absorption of copper. Prevention of loquat blue stiff both basic management; but also starting from the young fruit period: 1, basic management 1) loquat garden for the lack of organic matter, organic fertilizer should be increased, or intercropping beans, beans Fragrant