柑桔“小老头”树的主要特征是:栽后数年生而不长、或生长缓慢、树龄大而个体小.主要原因是栽植时没有深挖改土、缺肥、病虫危害造成的.为此,在改造时应采取针对性措施.1.深挖改土 柑桔虽然是小乔木,但又是常绿阔叶树和深根性树种.成年期主根入土深度可达1.7～2.4米,根系横向分布是树冠的1.5～2倍.但80%以上根系垂 The main characteristics of the citrus “little old man” tree are as follows: after a few years of planting, the growth rate is not long, or the growth is slow, the age of the tree is large and the size of the individual is small, mainly due to the fact that no deep digging, lack of fertilizer, pests and diseases are caused during planting. To this end, we should take pertinent measures in the process of transformation.1.It is an evergreen broad-leaved tree and a deep-rooted tree despite its small tree size.The soil depth of the main root in adulthood reaches 1.7-2.4 meters, Distribution is 1.5 to 2 times the crown, but more than 80% of roots hanging down