【摘要】 试验研究不同水分条件下冬小麦叶片叶绿素含量及光合速率的变化结果表明,随水分胁迫的加剧冬小麦叶片叶绿素含量降低,且叶绿素b比叶绿素a含量下降速度快,不同水分条件下冬小麦叶片叶绿素含量及光合速率季节变化趋势基本一致,拔节~抽穗期迅速上升,灌浆期后迅速下降,且叶绿素含量与光合速率呈显著正相关。随水分胁迫的加重冬小麦产量和经济系数均有所降低。更多还原

【Abstract】 The changes of chlorophyll content and photosynthetic rate in wheat leaves from different water treatments were studied.The results show that the chlorophyll content of winter wheat leaves has a decreasing tendency under water stress and chlorophyll b content declines obviously.The changing trends of chlorophyll content and photosynthetic rate under different water stresses and seasons are identical basically.They increase from jointing stage to booting stage and decrease at milking stage,moreover the correlation between chlorophyll content and photosynthetic rate is positive.Yield and economical coefficient of winter wheat decline with a strong water stress.更多还原