对华农、红玉、元帅、金冠、国光等苹果品种的21年生树,于各自的盛花期进行了石硫合剂疏花试验。石硫合剂浓度设0.5°、1°和2°三个处理,单株小区,重复三次。处理时全株喷布,注意药液喷在花的注头上,滴水为止。 以花朵座果率达到20～30%为最适负载量标准,得出以下结论;(1)华农 21-year-old trees of apple peasants, red jade, marshal, golden crown, Guoguang and other apple varieties were tested for the flowering of lime-sulfur mixture at their full flowering stage. Stone sulfur mixture concentration set 0.5 °, 1 ° and 2 ° three treatments, single plant, repeated three times. Spray the whole plant when handling, pay attention to the liquid spray on the flower head, drip so far. The results showed that the fruit rate of flowers reached 20 ~ 30% as the optimum loading level, and reached the following conclusions: (1)