Effect of rootstocks and double trunk on growth and fruiting of Rubin apple trees
2006
Porebski, S. | Poniedzialek, W. | Rzeznicka, B.,Krakow Agricultural University (Poland). Dept. of Pomology
Rubin apple trees grafted on M.9, P22, and P59 rootstocks were planted in spring 2000. In June 2000 the trees on M.9 and P59 rootstocks were grafted again with 10 cm scion of P22 rootstock. Moreover each year on the same grafted trees a 1 cm wide ring of bark was taken from the main trunk. On the basis of trunk cross section area growth of studied rootstocks can be ranged as following: M.9 (100 percent), P22 (99 percent), P59 (83 percent). A tendency was found to decrease the growth of the trees and better fruiting on rootstock M.9, and also better colour on double grafted trees. There was no difference in flowering and fruiting on trees growing on rootstocks M.9, P59 and P22. Fruits from trees grown on rootstock P22 had higher firmness and higher concentration Ca and P comparing to M.9
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