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1985年统计,我区种植甜橙达12817亩,由于品种混杂,以致有的种植后多年只开花不结果,或结果甚少,形成了大片低产园,即使结了果的,品质也低劣。针对这种现状,改造的途径主要是高接换种。信丰县脐橙场于1975年种植的几株华脐,于1979年春采用哈姆林良种高接了3株树,接后第二年开始挂果,第三年投产,1984～1986年每年单株产量都保持在180～200斤左右。南康、大余等县也有类似的例子。高接换种改造低劣柑桔树,必须注意和掌握以下几个环节: 1. 嫁接时期与方法 高接换种与大田育
Statistics in 1985 showed that there were 12,817 acres of sweet oranges planted in our district. As a result of the mixed varieties, some flowers did not bear fruit for many years after planting, or the result was very little. Large-scale low-yielding gardens were formed, and the quality was poor even if the fruits were harvested. In response to this situation, the main means of transformation is a high exchange rate. Xinfeng County navel orange plant was planted in 1975 several umbilical, in the spring of 1979 with Hamlin high seedlings received three trees, then the second year began fruiting, put into operation the third year, 1984 ~ 1986 annual yield per plant Are maintained at 180 to 200 pounds. Nankang, Dayu and other counties have similar examples. High accession transformation of poor citrus trees, we must pay attention to and master the following links: 1. Grafting period and the method of high exchange and Daejeon breeding