本试验系利用化学药剂(矮壮素、水分蒸发抑制剂)在苹果幼树生长后期或休眠期进行喷药,观察其对幼树安全越冬的效果,以期减少采用摘心、落叶等所花费的大量劳力,进一步简化安全越冬措施。试验从1971年冬开始。至1972年春,喷矮壮素的处理已初步获得了一些结果, This experiment is the use of chemical agents (CCC, water evaporation inhibitor) in apple late growth or dormancy during spraying, to observe the effect of sapling overwintering effect, with a view to reducing the use of topping, deciduous, etc. spent a large amount Labor, to further simplify the safety of winter measures. The experiment began in the winter of 1971. By the spring of 1972, some results were initially obtained in the treatment of phosgene,