红壤丘陵区双季稻表观光合量子效率的研究

Apparent quantum yield of photosynthesis of double cropping rice in red earth hilly region of China

研究结果表明红壤丘陵区双季稻光 光合速率响应曲线符合非直角双曲线函数 ,水稻旗叶、倒 2叶和倒 3叶表观初始光能利用效率平均值 (±标准差 )分别为 0 .0 5 36 (± 0 .0 2 3)、0 .0 5 11(± 0 .0 2 3)和 0 .0 4 88(± 0 .0 2 5 ) ,即由旗叶向下递减 ;水稻光合作用最适温度为 2 7～ 30℃。

The photosynthesis rate-light response curve of double cropping rice in the red earth hilly region is a non-rectangular hyperbola function. The average values and standard deviations of the apparent initial quantum yield of flag leaf,second leaf and third leaf from the top are 0.0536±0.023, 0.0511±0.023, 0.0488±0.025, respectively. That is, they descend gradually from the flag leaf to the lower leaves. The optimal temperature of photosynthesis of rice in this area is from 27℃ to 30℃.