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核桃芽接育苗一般多在三月春分前后10天进行。由于春旱、气温低,大面积成活率常常只有30—60％,未成活部分要待翌年春季再行补接,需间隔一年的时间。为缩短这一间隔期,加速核桃大面积生产,我们在漾濞方块芽接的基础上,根据南涧气候特点,参考管状芽接,在春分至8月之间,开展了大方块芽接试验并获得成功。这一方法,几年来已成为我县核桃嫁接的主要方法,成活率一般达70％,好的达90％,现将这种方法简介如下: ①砧木的选择:以10年生以下铁核桃树和铁核桃大树桩上2—3年生的萌芽枝条作砧木。②接穗:采用泡核桃树冠外缘健壮的1—2年生枝条作接穗。
Walnut bud seedlings then generally more than March 10 points before and after the spring. As a result of spring drought, the temperature is low, the survival rate of large area often only 30-60%, not living part to be rebuilt next spring, take a year interval. In order to shorten this interval and speed up the large-scale production of walnut, we conducted a large square budding test and succeeded based on the characteristics of Nanjian clique, referring to the tubular sprouting, from the spring equinox to August. This method has become the main method of grafting walnut trees in our county in recent years. The survival rate is generally 70% and the good is 90%. Now this method is introduced as follows: ① Rootstock selection: Iron walnut stump 2 - 3-year-old sprouting branches for rootstocks. ② scion: bubble walnut crown with robust 1-2 year old branches for the scion.