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试验测试了短枝型苹果叶片光合作用强度的变化动态及其在不同品种、不同枝类、不同叶位叶片上的差异,分析了“库”、“源”关系。各品种叶片光合强度的变化趋势一致,但是短枝型品种同化产物显著多于普通型(新红星、金矮生比红星高35.32%、35.22%)。新红星新梢自上而下第五片叶净同化率达最大值(Pn=15.39mgCO_2·dm~(-2)·h~(-1)),其短枝叶片也有较高的同化效能,这是短枝型苹果早果、丰产的生理基础之一。
The dynamic changes of photosynthesis intensity of spruce-apple leaves and their differences in different varieties, branches and leaves at different leaf positions were tested. The relationship between “source” and “sink” was analyzed. The trend of photosynthetic intensity of leaves of all varieties was the same, but the assimilation products of spur type varieties were significantly more than that of common type (New Red Star, 35.32% and 35.22%). The net leaf assimilation rate of the fifth shoot from top to bottom reached the maximum (Pn = 15.39mgCO 2 · dm -2 · h -1), and its short branch leaf also had higher assimilation efficiency. This is one of the physiological basis of early fruiting and yielding spur type apples.