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本文主要研究了茶树新梢不同生育状况下叶片光合速率的变化。结果表明,新梢生长—休止光合速率由高转低,冬季更低,但随着芽萌发生长又有回升,高峰在1芽2叶期。正常新梢1芽3叶净光合仍为负值;春1芽5叶、夏秋1芽4叶才有少量光合产物积累。对夹2、3叶从驻芽起便有光合产物积累,其量与叶面积俱增。采摘所留鱼叶光合速率与正常叶相近;留2叶与留1叶光合源能力相近。自然生长新梢随叶数增加而光合速率降低;采摘促进新芽萌发,因而促进光合速率提高。着蕾可提高母叶光合速率;蕾愈多,增加愈大。驻芽前打顶则降低光合速率。
This paper mainly studies the changes of leaf photosynthetic rate under different growth stages of tea shoots. The results showed that the shoot growth-pause photosynthetic rate of shoots turned from high to low in winter, but rose again with the germination and growth of shoots, with the peak at 1-leaf 2-leaf stage. Normal shoots 1 bud 3 leaves net photosynthesis is still negative; spring 1 bud 5 leaves, summer and fall 1 bud 4 leaves have a small amount of photosynthetic product accumulation. On the 2,3 leaves from the shoots have photosynthetic product accumulation, the amount of leaf area increases. The photosynthetic rate of picked leaves was similar to that of normal leaves, while the photosynthetic rate of remaining 2 leaves and remaining leaves was similar. The number of shoots increased with the increase of leaf number and the photosynthetic rate decreased. Picking promoted the germination of shoots and thus increased the photosynthetic rate. Bud can improve the parent photosynthetic rate; Lei more, the greater the increase. Budding in the bud before the lower photosynthetic rate.