黄岩是我国柑桔的老区,从50年代开始推广的柑拮细修剪,经过30多年的实践,已越来越不适应市场经济发展的形势。这种细修剪,果农不易熟练操作,化工又大,并因长期修剪细枝以后,致使许多桔树树冠郁闭,结果性和果实品质降低。由于柑桔细修剪技术存在着较多的问题,为了“振兴黄岩蜜桔雄风”,1990～1993年先后引进日本柑 Huangyan is the old citrus of our country. Since the 1950s, the promotion of citrus tree has been carried out. With more than 30 years of practice, Huangyan has become increasingly unsuited to the situation of market economy. This fine pruning, fruit farmer is not easy to skilled operation, chemical and large, and because of long-term pruning twigs, resulting in many canopy canopy closed, fruit and fruit quality reduced. As citrus fine pruning technology there are more problems, in order to “revitalize Huangyan tangerines glory”, from 1990 to 1993 has introduced Japanese mandarin orange