사과 후지품종의 착과생리에 관한 연구 : I.結果技頂芽크기 및 樹冠內 着果位置가 開花 , 結實 , 果實特性에 미치는 影響 I.Effect of terminal bud size on spur during a rest period and fruit setting position on flowering,fruit setting and fruit characteristics = Studies on Fruit Setting Physiology in Fuji Apple Tree

다국어 초록 (Multilingual Abstract)

In order to obtain available data for increasing fruit setting and fruit quality in Fuji apple(Malus domestica Borkh. ), studies were conducted to find out the relationship between some characters of terminal bud of spur during a rest period, flowering, fruit setting, and fruit quality. Fruit quality was also measured in relation to setting position of the tree.
The results are summarized as follows ;
1 . Terminal buds of spur in Puji cultivar was smaller than that of Starkrimson and Jonathan. Flowering rates of Fuji was lowest except the trees grafted on M 26 rootstock which showed same flowering rates as Jonathan.
2 . Floral bud size was larger than the vegetative bud in terminal buds of spur.
3. Flowering rates and fruit setting rates increased with the increasement of bud size, especially with the increasement of bud length rather than width.
4. In Fuji cultivar high flowering rates were obtained from larger buds of 4.1㎜ width with 6.1㎜ length and in Starkrimson from the buds of above 4.1㎜ width with 7.1㎜ length.
5. Fruit setting rates of flowers of different bud size were similar except very small buds.
6. There was a close relationship between the size of buds and the mature fruit size, but no relationship with fruit color, sugar content or total acid content.
7. Almost all the small terminal buds of spur in Starkrimson were vegetative, but in Fuji many floral organs were observed even in small buds.
8. There was a close relationship between fruit quality and setting position of canopy ; The fruit quality bearing on east and north direction was inferior to that on south and west, and it was lower with lower position of same direction. Fruit quality bearing on long spur was lower than that on medium, or short spur.