The Young tree of Starking Delicious was fed with ~(14)C. The result showed that ~(14)C relative mark level in above ground part of dwarfing interstock is higher than that in root, as well as standard stock.

• 秋季以~(14)C喂饲红星苹果幼树,矮化中间砧树地上部~(14)C同化物质相对量高于根系,高于乔砧树。