叶片是果树最主要的光合器官,研究叶片中光合产物的运转与分配规律,对于合理利用光能,提高光合效率,增加果树产量具有重要意义. 一、材料与方法试验于1978～1979年在我院同位素试验室栽植场和教学试验农场进行.以苹果、梨、桃、葡萄和枣为试材,前三者为1977年秋天带叶栽植的2年生苗.苹果和梨为盆栽,栽植盆为直径25厘米、高50厘米的白瓷盆,为减少外 The leaves are the most important photosynthetic organs of fruit trees and it is of great significance to study the operation and distribution of photosynthetic products in leaves and to make rational use of light energy, increase the photosynthetic efficiency and increase the yield of fruit trees. I. Materials and Methods Experiments During 1978 ~ 1979 Institute of isotopes laboratory planting farm and teaching experiment farm.Apple, pear, peach, grape and jujube as the test material, the first three were planted in autumn 1977 with leaf 2-year-old seedlings.Apple and pear are potted plants planted pot Diameter of 25 cm, 50 cm high white porcelain basin, to reduce the outside