摘要
研究了３年生平茬香椿的光合特性。结果表明，香椿初展叶光合速率很低，约２０ｄ内迅速增强，此后基本稳定，６０ｄ后又迅速降低。７月份单叶光合速率日变化为双峰曲线，有明显的光合“午休”现象。由于受叶龄及环境条件等影响，不同季节光合速率表现为生长前期和后期较低，中期较高。植株采用适量的ＰＰ３３３处理，可矮化株形并提高光合速率。
Photosynthesis of Chinese toon Toona sinensis (A.Juss.)Roem. at different growth stages,different leaf ages and the daily photosynthetic changes,as well as the influences of CO 2 concentration,light intensity and PP 333 treatment on photosynthesis were studied.The result showed that the hightest photosynhtetic rates were observed at plant rapid growing stage,and at leaf age of 20-60 days.The daily photosynthetic rates varied with a double peak curve,reaching the first peak at about 9:00 and the second peak at about 15:00.When applyed with PP 333 ,the height of Chinese toon was dwarted but its photosynthetic rate was slightly increased.
出处
《园艺学报》
CAS
CSCD
北大核心
1999年第3期180-183,共4页
Acta Horticulturae Sinica
关键词
香椿
光合特性
PP333
Chinese toon
Photosynthetic characteristics
PP 333
