苹果“旭”夜间增加温度到25℃促进了早期落果。对早期落果和新梢生长之间的关系进行了观察。当温度增高时新梢生长比较旺盛,同时引起了落果。于是可下这样的结论:落果是由于新梢生长争夺营养物质而引起的。喷洒B_9能够抑制新稍生长使座果增加。新梢摘 Apple “Asahi” night to increase the temperature to 25 ℃ to promote the early fruit drop. The relationship between early drop and shoot growth was observed. When the temperature is higher, shoot growth is more vigorous, and at the same time, it causes fruit drop. So the conclusion can be made: falling fruit is due to shoot growth competing for nutrients caused. Spraying B_9 can inhibit the new growth of the fruit to increase. Pick a new shoot