苹果大小年是生产上较普遍的现象,尤其国光品种在花量过大、座果过多的情况下,使树体负载过重,影响正常生产和果树寿命。正确运用疏花疏果技术,使果树合理负载,是克服大小年结果的有效措施之一。 为了进一步探索化学疏除在国光品种上的效果,1984年,我们在蒙阴园艺场进行了试验, Apple size year is a common phenomenon in production, especially Guoguang varieties in the excessive flowering, too much fruit, making the tree load is too heavy, affecting the normal production and fruit life. Proper use of thinning and thinning fruit technology to make the tree a reasonable load, is to overcome the size of the annual results of effective measures. In order to further explore the effect of chemical sparse on the Guoguang species, in 1984, we conducted a test in the Mongolian horticultural field,