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对16个梨品种的光合速率比较研究表明,分布于我国东北地区的秋子梨系统品种和白梨系统品种的光合作用光饱和点比分布于华北地区的白梨系统品种和中南地区的砂梨系统品种的光饱和点低,前者为45—55klx,后者为65klx。16个梨品种在饱和光强下的光合速率在10.1—18.2mgCO_2dm~(2)h~(-1)之间。白梨系统(6个品种平均值)的光合速率较高,为15.5mgCO_2dm~(2)h~(1),砂梨系统(4个品种平均值)的光合速率较低,为12.7mgCO_2dm~(-2)h~(-1),秋子梨系统(4个品种平均值)的光合速率为14.8mgCO_2dm~(2)h~(1),介于白梨系统和砂梨系统之间。
The comparative studies on photosynthetic rate of 16 pear cultivars showed that the light saturation points of photosynthesis of the varieties of Qiugi pear and variety Pear cultivars distributed in northeast China were higher than those of pear cultivars distributed in North China and pear cultivars in South China Light saturation point variety is low, the former is 45-55klx, the latter is 65klx. The photosynthetic rate of 16 pear cultivars under saturated light intensity ranged from 10.1 to 18.2 mg CO2dm ~ (2) h ~ (-1). The photosynthetic rate of white pear system (average of 6 cultivars) was 15.5mgCO 2 dm -2 h -1, while that of sand pear system (average of 4 cultivars) was 12.7mgCO 2dm ~ (-1) -2) h ~ (-1), and the photosynthetic rate of autumn pear system (average of four cultivars) was 14.8mgCO_2dm ~ (2) h ~ (-1), which was between that of the pear and pear systems.