浙江省云和县柑桔总面积达 6 2 6 4 7ｈｍ2 ,由于缺乏科学管理 ,存在不同程度的桔园低产和大小年结果现象。利用晚秋时节对桔园进行“三改” ,可使徒长树、衰弱树和“烂脚”树恢复正常结果。1　环剥改造徒长树　有些低产桔园多因枝叶过于茂盛 ,导致只开花不结果或无花无果。对 The total area of ​​citrus in Yunhe County of Zhejiang Province is up to 6 2 6 4 7hm2. Due to the lack of scientific management, there are different degrees of low yields and large and small annual results of the orange orchard. The use of late autumn orange garden for “three changes”, the Acts grow trees, weak trees and “rotten feet” tree to restore normal results. 1 Girdle rehabilitated trees Some low-yield orange garden because too many branches and leaves are too lush, resulting in only flowering no result or no fruit no fruit. Correct