论文部分内容阅读
以5年生大金星山楂品种为试材,对其开花结果期叶片光合速率作了研究,结果表明,山植结果新梢叶片在展叶后15d时即有大量的光合产物输出,展叶后48d时光合速率达到第2次高峰.在不同生育期、天气状况下,叶片的光合速率变化较大,阴天时明显降低.树冠外、中、内各层结果新梢叶片光合速率依次降低.盛花期喷布赤霉素,可提高叶片的光合速率.外围营养枝和结果新梢叶片的光合速率无显著差异.
Taking 5-year-old big golden hawthorn varieties as materials, the leaf photosynthetic rate was studied at the flowering and fruiting stages. The results showed that there were a large number of photosynthetic products output in the shoots of new shoots of mountain plants at 15 days after leaf unfolding. Photosynthetic rate reached the second peak.Under different growth stages and weather conditions, the photosynthetic rate of leaves varied greatly and the cloudy days decreased significantly.The results showed that the photosynthetic rate of new shoots in the outer, middle and inner canopy decreased in turn Spraying gibberellin could increase the photosynthetic rate of leaves.The photosynthetic rate of peripheral vegetative shoots and shoots of new shoots showed no significant difference.