苹果短枝型品种光合特性研究

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。

STUDIES ON THE CHARACTER OF PHOTOSYNTHETIC OF APPLE SPUR TYPE VARIETIES

The dynamic of photosynthetic intensity in spur type apple leaves in different positions and shoots from different varieties leaf were testc?. The tendency of photosynthetic intensity was the same among various varieties. The assimilation product of the spur type varieties was significantly more than that of the standardtypes. The short shoot leaves had higher assimilating efficiency with the 5th leaf(from top end to basic) of the Starkrimson new and the leaves on new shoot having the maximal net photosynthetic assimilation rate(Pn=15.39mg CO_2·dm~(-2)·h~(-1)).This is one of the physiologicl bases for the early bearing and high yielding spur type apple.