对于苹果、梨等幼旺树，利用枝干环剥控长促花，实现早期丰产，是实践中久已广泛采用的措施。在不是过份干旱的年份，２０～３０天都会很好愈合，生产中一般不采取包扎和涂抹药剂保护。可是，１９９７年唐山果园一个村子的３００亩集体果园，５年生密植苹果６月初普遍进行... For apples, pears and other flourishing trees, the use of branches and ring pendulous control of long flowers, to achieve early harvest, is the practice has long been widely used measures. In the not too dry year, 20 to 30 days will be well healed, generally do not take the dressing and smear drug production protection. However, in 1997, orchards in Tangshan, a village of 300 acres of collective orchard, 5-year-old close planting of apple in early June generally ...