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采用化学药剂疏除过多的花果是现代果树管理的一项重要措施,也是目前克服苹果大小年结果的最有效的方法之一。 苹果化学疏除的研究在国外始于30年代初期。目前在许多国家已成为果园管理的常规措施之一。我国的化疏研究起步较晚,加之化学疏除的效果受各种生态因子的影响,稳定性不佳。故此,化学疏除在我国至今还没有广泛的应用于生产。尤其是在我国花期霜冻比较频繁的北方地区,开展化学疏花疏果的研究报导更少。为了探索在苹果栽培的北界地带运用化学疏除的前景,从1979年开始先后在宁南山区和银川平原开展了化学疏果的研究,试图找出适宜宁夏自然条件、生产条件的较好的疏果药剂、浓度和使用时期。
It is one of the most important measures to control the fruit tree in modern times, and it is also one of the most effective ways to overcome the annual results of apple size. Apple chemical sparse research in foreign countries began in the early 1930s. In many countries it has become one of the conventional measures for orchard management. The study of chemical composition in China started late, and the effect of chemical sparseness was affected by various ecological factors and its stability was not good. Therefore, chemical sparse in our country has not yet been widely used in production. Especially in northern China, where flowering frost is relatively frequent, there is less research report on chemical thinning and thinning fruit. In order to explore the prospect of chemical sparse use in the northern boundary of apple cultivation, a study on chemical thinning has been carried out in Ningnan mountainous area and Yinchuan plain since 1979, trying to find out the suitable natural conditions and production conditions in Ningxia Thinning agent, concentration and period of use.