Grafting Fraser Fir (Abies fraseri): Effect of Scion Origin (Crown Position and Branch Order)

Success and subsequent growth of fraser fir [Abies fraseri (Pursh) Poir.] cleft grafts were studied in relation to origin and type of scion material in the tree crown. First- and second-order shoots (current-year) were collected from five zones in the crown, ranging from top to bottom, and grafted to 5-year-old fraser fir transplants in April. Success rates were similar for first- and second-order scions, whereas budbreak and subsequent growth were best for first-order scions. In general, results were best for first-order scions taken from the upper crown. Plagiotropism of grafts was similar for all crown zones and shoot types.

对弗雷泽冷杉[Abies fraseri (Pursh) Poir.]劈接的成功率及后续生长情况进行了研究，研究涉及树冠中接穗材料的来源和类型。从树冠顶部到底部的五个区域采集当年生的一级和二级枝条，并于4月嫁接到5年生的弗雷泽冷杉移植苗上。一级和二级接穗的成功率相似，而一级接穗的芽萌发和后续生长情况最佳。一般来说，取自树冠上部的一级接穗效果最佳。所有树冠区域和枝条类型的嫁接苗斜向生长情况相似。