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根据我们1982年春季对八个茶树品种六种不同越冬叶片光合速率的测定结果表明: 1.树冠上层四叶越冬秋梢,只有第一叶与其他叶之间光合速率的差异达到了显著水准,其余各叶位之间光合速率的差异不显著。品种间同一叶位变异较大,其中第一叶位变异系数为21.8%;第四叶位只14.9%。2.树冠上层春梢叶光合速率大于中、下层叶;上下层之间差异显著,其他层次之间差异不显著。3.自然生长新梢,越冬后春梢段叶光合速率最低,夏梢段叶光合速率最高,秋梢段叶居中;采摘茶树以越冬后的秋末梢(四、五轮枝)叶片光合速率最高,三、二、一轮枝叶片依次减弱。4.树冠上层越冬叶片的光合速率为顶芽的生育所左右,休止期稍低,萌发至一芽一叶期较高,一芽三叶期降低,采摘后有所回升。5.修剪和采摘可以发挥越冬叶的光合潜力,增强光合机能。
According to our spring 1982, we measured the photosynthetic rate of six different overwintering leaves in eight tea varieties: 1. The difference of photosynthetic rate between the first leaf and the other leaves reached the significant level, There was no significant difference in photosynthetic rate between the other leaves. Varieties with the same leaf position variability larger, of which the first leaf coefficient of variation was 21.8%; the fourth leaf only 14.9%. The photosynthetic rate of spring shoots in the upper canopy was higher than that in the middle and lower leaves. There was significant difference between the upper and lower layers, while the difference between the other layers was not significant. The photosynthesis rate of spring shoots was the lowest, the highest photosynthetic rate of summer shoots was the highest, and the leaves of autumn shoots were middle; the photosynthetic rate of the leaves at the end of autumn (four or five shoots) after picking was the highest , Three, two, a turn of leaves and weakened. The photosynthetic rate of the overwintering canopy in the top of canopy is about the fertility of the top bud, the rest is slightly lower, the germination to a bud a higher leaf stage, a bud of the three-leaf stage is reduced, picked up after the recovery. 5. Pruning and picking can play the winter photosynthetic potential, enhance photosynthetic function.