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用红外线二氧化碳分析仪不离体测定富士苹果的净光合率,结果表明:在10～70Klx 的光强范围内,净光合率随光照强度的增强而增高。70Klx 时出现17.06mgCO_2/dm~·2h 的最高值。70Klx 为光饱和点。超过 80Klx 时,净光合率降低。25℃左右净光合率出现22.0mgCO_2/dm~2·h 的最高值,35℃左右出现13.53mgCO_2/dm~2·h 的最低值。20℃和30℃时净光合率接近。苹果营养枝上不同节位和砧木的叶片,净光合率不同。这为选择丰产的穗砧组合和枝稍结构提供了一个生理指标。
The net photosynthetic rate of Fuji apple was determined by infrared carbon dioxide analyzer. The results showed that the net photosynthesis rate increased with the increase of light intensity in the light intensity range of 10 ~ 70Klx. 70Klx 17.06mgCO_2 / dm ~ · 2h when the highest value. 70Klx for light saturation point. When more than 80Klx, net photosynthetic rate decreased. The net photosynthetic rate at 25 ℃ appeared the highest value of 22.0mgCO 2 / dm ~ 2 · h and the lowest value of 13.53mgCO 2 / dm ~ 2 · h appeared at 35 ℃. The net photosynthetic rate was close at 20 ℃ and 30 ℃. Apple noumenal branches and rootstock leaves, the net photosynthetic rate is different. This provides a physiological indicator for the selection of high-yielding panicle anomaly and shoot structure.