摘要
试验研究了小麦灌浆期各光合器官光合性能结果表明 ,小麦不同光合器官在 1天中最大光合速率存在明显差异 ,表现为旗叶 >穗梗 (穗下节间 ) >芒 >叶鞘 >去芒穗。小麦非叶光合器官 (穗、鞘和穗梗 )在灌浆期有较强的光合能力。 1天中特别是下午非叶光合器官维持较高的光合能力 ,而旗叶光合速率在下午下降很快。叶片、穗梗和叶鞘光补偿点相近 ,但穗光补偿点较高。
The observation of the daily photosynthesis variation of different green organs of winter wheat in the grain-filling s tage show that there is an obvious difference between the largest photosynthetic efficiencies of different green organs in one day. It behaves as flag leaf>stem >awn>sheath>spike without awn. The green organs except the leaf also have strong photosynthetic capability. During the daytime, the photosynthesis rate of flag leaf drops very fast in the afternoon, but the green organs keep higher photosyn thetic efficiency. The photo-compensation points of leaf, stem and sheath are very near, but the spike's is much higher. There is no obvious n oon break of spike.
出处
《中国生态农业学报》
CAS
CSCD
2003年第4期10-11,共2页
Chinese Journal of Eco-Agriculture
基金
国家重点基础研究( 973)发展规划项目(G 1 9980 1 0 1 0 0 )资助
