论文部分内容阅读
以高接换头法进行品种的更新换代,各地均有大量成功的经验,但由于受传统的改接技术所限(改接换头部位过少,改按部位过粗等),树冠恢复较慢,改接后需经三年才能恢复产量。为了加速苹果品种的更新改造,我们于1993年春运用多头高接换种措施,对加快恢复树冠、早结果、早丰产技术进行了系统的研究,达到一年改接,二年恢复树冠,平均株产28公斤,三年恢复产量的经济指标,现报告如下。
The replacement of varieties by high replacement method, there are a large number of successful experiences around, but due to the traditional method of switching technology is limited (change the head replacement is too small, change the site too coarse, etc.), the crown restored Slower, take over after three years to resume production. In order to speed up the renewal and transformation of apple varieties, we systematically studied the techniques of accelerating the restoration of canopy, early result and early bumper crop in the spring of 1993 with the method of long high exchange. Production 28 kg, three years to resume production of economic indicators, are as follows.