脐橙又名抱子桔,是柑桔良种,品质极佳,但在黄岩表现不丰产;本地早也是柑桔良种,在黄岩也有许多树表现不结果。为了解决这个问题,自1958年以来,我们对不结果的脐橙和本地早,进行枝条环剥试验,取得了较好的效果。现将试验结果和具体做法分述如下:一、环剥的增产效果1958年,我们在全区大搞柑桔高压育苗中观察到不结果的本地早枝条,由于经过环状剥皮而普遍结果。观察了10个小枝(枝条直径0.6厘米),环剥的平均每枝结果7.2个,未环剥的枝条不结果。1959年对不结果的脐橙环剥了5个小枝,枝粗0.6厘米,其中3枝结果6个,2枝是后期落果。1964年将一株15年生的不结果本地早,对半数枝条进行环 Navel orange, also known as spruce orange, is a citrus seed of excellent quality but not very rich in Huangyan. The local citrus seeds are also early elite, and many trees in Huangyan show no result. In order to solve this problem, since 1958, we have performed good results on the unfavorable navel orange and local early-morning girdling tests. Now the test results and specific practices are as follows: First, the girdling effect of increased production In 1958, we vigorously engaged in citrus high-voltage seedlings observed in the local results of the local early branches, due to ring-shaped peeling and the general results. Ten branchlets (0.6 cm diameter branches) were observed, with an average of 7.2 per girdling results and no girdling of the branches. In 1959 on the navel orange peel ring 5 branches, 0.6 cm thick branches, of which 3 6, 2 are late fruiting. In 1964, a 15-year-old no result local earlier, the ring on half of the branches