渭北核桃高接技术研究

在渭北特定气候条件下,对核桃高接时期、高接方法和高接保护措施进行了比较研究,建立了核桃高接技术体系.研究表明,核桃树幼叶长到2 cm至雌先型品种幼果形成时的4月中、下旬至5月上旬,根据砧木粗度选用适宜的嫁接方法(砧木直径＜3 cm用双舌接,3～12 cm用插皮舌接,＞12 cm用嵌皮钉穗接法)进行高接,将接口及接穗用农膜型塑料袋密封保护,外包报纸遮阳,可使头接成活率达到90%以上.并根据树龄及树冠大小确定合理的嫁接头数,能迅速恢复树冠,增加产量.该技术经大面积示范应用,效果持续稳定.

Study on Techniques of Walnut Top Working in Weibei

Based on the evaluated time,method and protective measure of top working under Weibei environment,the technical system of walnut top grafting has been established.The study showed that when the grafting was carried from younger leaves grown 2 cm long to younger fruits development and the scion and grafting wounds were sealed by agricultural plastic inside and newspaper covered out-side,over 90% survival ratio of top grafting have been achieved.Which method of grafting used and how many limbs grafted.Depending on the size of the rootstock or branch.This technique have stable effect in large scale.