ニワウメおよびユスラウメ台と穂木品種との組合せによるモモ樹の生育および生産性

The suitability of Prunus japonica Thumb. and P.tomentosa Thumb.as the dwarfing rootstock for 7 peach and 2 nectarine cultivars was investigated. During the experiments, the following types of trees died : \u27Takeihakuhou,\u27 \u27Hikawahakuhou,\u27 \u27Akatsuki\u27 and \u27Flavortop\u27 grafted on P.tomentosa and \u27Takeihakuhou,\u27 \u27Hikawahakuhou\u27 and \u27Hiratsukared\u27 grafted on P.japonica. No deaths observed among \u27Saotome,\u27 \u27Chiyohime,\u27 \u27Kansukehakutou\u27 and \u27Shimizuhakutou\u27 on either dwarfing rootstocks. Tree height, trunk diameter and total shoot length were smaller in all cultivars on P.japonica and P.tomentosa than in P.persica. The cultivars\u27Chiyohime,\u27 \u27Hikawahakuhou,\u27 \u27Kansukehakutou\u27 and \u27Shimizuhakutou\u27 had smaller trees on the P.tomentosa rootstock than on the P.japonica rootstock. On the other hand, the cultivars \u27Saotome\u27 and \u27Hiratsukared\u27 had smaller trees on P.japonica than P.tomentosa. The results indicated that fruit maturation accelerated and the soluble solids content in the fruit was high in the both dwarfing rootstocks. The annual yield per unit area of trees from the dwarfing rootstock tended to be less than that in the paech rootstock