CHARACTERISTICS OF ‘HAYWARD’ KIWIFRUIT VINES GROWN ON THEIR OWN ROOTS OR GRAFTED ONTO ACTINIDIA POLYGAMA OR ACTINIDIA RUFA

During 1988–1997, fruit characters and vegetative production were compared for kiwifruit vines, Actinidia deliciosa ‘Hayward’, that had been grafted onto rootstocks of A. polygama or A. rufa or grown on their own roots.
The average weight of fruit at harvest and the sugar content of the fruit after a ripening treatment were investigated during 1993–1997. For these 5 years, the mean weight per fruit was 89.4 g, 123.8 g and 122.1 g, and the mean sugar content was 17.7%, 16.5% and 15.8% for ‘Hayward’ vines grafted onto A. polygama, grafted onto A. rufa or grown on their own roots respectively.
The total fresh weights of leaves, fruit, wood (shoots and trunk) and roots in these vines were investigated at harvest 10 years after planting.
Weights of the various parts of vines grafted onto A. rufa were almost equal with those grown on their own roots, whereas vines grafted onto A. polygama produced the least.

Following a drought in summer 1994, the leaves of vines grafted onto A. polygama showed the severest browning, while the leaves of vines grown on their own roots showed the least browning.

As a result of this investigation, A. rufa is considered to be much better than A. polygama as a rootstock from a practical point of view for ‘Hayward’ kiwifruit.

IV International Symposium on Kiwifruit

H. Nitta, S. Ogasawara

fruit fresh weight, soluble solids, rootstocks, trunk girth, leaf browning

https://doi.org/10.17660/ActaHortic.1999.498.38