GROWTH AND NUTRITIONAL STATUS OF TWELVE APRICOT VARIETIES GRAFTED ON TWO ROOTSTOCKS

Growth and nutritional status of the apricot varieties Bulida, Bebecou, Goldrich, Bergeron, Tirynthos, Early Orange, Canino, Sunglo, San Castrese, Moniqui, Harogem and Orange Red grafted on the rootstocks Manicot and GF 31, were determined.
Trunk girth differed significantly among the tested apricot varieties.
Especially, trunk girth of the varieties grafted on the rootstock GF 31, were greater than on apricot seedling Manicot.
The sufficiency ranges of leaf N, P, K, Ca, Mg, B, Zn, Mn and Fe content of the grafted varieties on each rootstock were also defined.
Multiple regression analysis of the scions trunk girth grafted on the rootstocks Manicot and GF 31 related to leaf mineral content revealed high R² (adj.) (0.967, and 0.987, respectively). Furthermore, a stepwise variable selection showed that the nutrients N with Mn and N, K and Fe were selected as significant for the scions grafted on the rootstocks Manicot and GF 31, respectively.
From the above results the following conclusions could be drawn: 1) Varieties grafted on the rootstock GF 31 presented greater growth than on Manicot. 2) Leaf nutrient content of the scions showed a great variation and differed significantly between the two rootstocks. 3) Increased leaf concentrations in certain nutrients resulted in greater scion trunk girth.

XI International Symposium on Apricot Culture

D. Velemis, D. Almaliotis, S. Bladenopoulou, I. Karayiannis

Leaf mineral content, trunk girth, graft union, regression analysis

https://doi.org/10.17660/ActaHortic.1999.488.78