不同生长期木薯品种气体交换特性的研究  

Studies on the gas exchange characteristics of different cassava varieties

作　　者：吴炫柯[1] 李永健[2] 李杨瑞[3] 

机构地区：[1]柳州市农业气象试验站,广西柳州545003 [2]广西大学农学院,广西南宁530005 [3]广西农业科学院,广西南宁530007

出　　处：《西南农业学报》2006年第3期456-459,共4页Southwest China Journal of Agricultural Sciences

摘　　要：在大田条件下,研究了不同木薯品种的气体交换特性,探讨不同生长期各个木薯品种气孔导度、胞间二氧化碳浓度、净光合速率、蒸腾速率之间的相互关系及叶绿素含量对净光合速率的影响。结果表明,不同生长期各个木薯品种气孔导度、胞间二氧化碳浓度、净光合速率及蒸腾速率之间均呈极显著的正相关关系;在木薯的生长前期非气孔限制是光合速率变化的原因,在后期则主要是由气孔限制引起的。Under field conditions, the gas exchange characteristics of different cassava varieties were studied. The correlations between the net photosynthesis rate and the stomata conductance, intercellular CO2 concentration, transpiration rate and net photosynthetic rate and the effects of chlorophyll content were studied. The results showed that the correlation among stomata conductance, intercellular CO2 concentration, transpiration rate and the net photosynthesis rate was highly significantly positive; the main causes for the net photosynthesis rate decline were nonstomatal limitation at earlier growth duration and stomatal limitation at later growth duration.

关 键 词：木薯 品种 气体交换特性 气孔限制 

分 类 号：S533.024[农业科学—作物学]