核桃当年嫁接枝基部不定芽萌枝坐果率调查

为改造低产低效核桃园,在扶风县进行了萌发枝芽接西林3号和来年截干处理,结果表明嫁接换优和截干有利于萌发结果枝,果枝率可达60%以上,双果枝率近似或超过单果枝率,叶面喷施植物协同钙肥更有利于形成结果枝和双果枝;截干后萌发的枝条基径越大越有利于形成结果枝和双果枝,且结果枝都有果苔付梢特征,可为下年结果打下基础。建议当地可以西林3号为良种,采取萌枝芽接换优和良种萌枝截干修剪,截干后新枝萌发时叶面喷施植物协同钙肥,并在结果枝半木质化时对其扭拉成型,适量剪除基径小于0.5 cm的萌发枝。

Investigation into Adventitious Bud Germination Type and Fruiting Rate of Grafted Walnut in Current Year

To improve the low yield walnut plantations,bud grafting of variety Xilin No.3 to walnut trees was applied.The result showed that grafting and stem cutting can improve generation of bearing branches reaching up to 60%,with double bearing branches surpassing single bearing branches,to which foliage fertilization can contribute.Stem cutting off can make basal of new branches bigger which beneficial to the generation of bearing branches.So it is suggested that variety Xilin No.3 is bud grafted and stem cutting off for new branch generation,with foliage fertilization applied afterwards.When semi-lignified,bearing branches should be trained into scheduled shape and shoots of basal diameter less than 0.5 cm should be removed.