A. Yordanov*, S. Tabakov, G. Dobrevska
Department of Fruit Growing, Faculty of Viticulture and Horticulture, Agricultural University, 12 Mendeleev, 4000 Plovdiv, Bulgaria
Abstract. The study was carried out in the experimental field of the Agricultural University near Plovdiv – Central South Bulgaria during the period 2007 – 2010. Trees of cultivars Hyakume and Hiratanenashi were produced by chip and T-budding performed in the first year nursery field on 10 September and chip- budding and tongue grafting performed in the second year nursery field on 1 March. One year old seedlings of Date plum (Diospyros lotus L.) were used as rootstocks. During the studied period steady high bud take assessed as final output of nursery trees to both cultivars was noted with the budding and grafting performed on 1 March (93.3 – 98.3%). Summer chip-budding provides higher bud taking for both cultivars in comparison to the T-budding performed in the same period. The budding performed in summer in the first year nursery field favours the obtaining of higher and more branched trees of both cultivars. Budding performed in spring in the second year nursery field resulted in smaller size and less branched trees. In order to avoid the risk of winter cold injury, the plants budded in the summer and those assigned for chip-budding in spring have to be hilled with soil up to 20 cm above the soil level.