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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (12): 263-266.

所属专题： 马铃薯

• 农学 农业基础科学 • 上一篇    下一篇

6个木薯品种光合特性的研究

陈冠喜,,李开绵,叶剑秋,许瑞丽   

  • 收稿日期:2009-03-03 修回日期:2009-04-22 出版日期:2009-06-20 发布日期:2009-06-20

Studies on photosynthetic characteristics between six species cassava

Chen Guanxi,, Li Kaimian, Ye Jianqiu, Xu Ruili   

  • Received:2009-03-03 Revised:2009-04-22 Online:2009-06-20 Published:2009-06-20

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摘要： 利用GFS-3000便携式光合-荧光测量系统，对6个木薯品种在生长发育过程中的净光合速率(Pn)、蒸腾速率(E)、气孔导度(Gs)、胞间CO2浓度(Ci)进行了研究。结果表明，6个木薯品种的净光合速率（Pn）在生育期变化呈先增后降的曲线，蒸腾速率(E)和胞间CO2浓度(Ci)的升降并不完全受气孔导度(Gs)的影响。经邓肯氏新复极差比较，华南6（SC6）和华南7（SC7）的Pn 显著高于其它各个木薯品种，华南205（SC205）、华南（SC5）的Pn 显著高于华南9（SC9）,而与华南8（SC8）差异不显著

Abstract: Used GFS-3000 portable photosynthesis-fluorescence measurement system studied the net photosynthesis rate (Pn), transpiration rate (E), stomatal conductance (Gs) and intercellular CO2 concentration ( Ci) in the growth and development on six species cassava. The results showed that net photosynthesis rate （Pn）was increased in the earlier stage of growth period,and decreased in the late growth stage. The change of transpiration rate (E) and intercellular CO2 concentration was not affected by stomatal conductance (Gs) completely. The net photosynthesis rate (Pn) of South China 6（SC6） and South China 7（SC7） was higher than other cassava varieties significantly,and the Pn of South China 205（SC205） and South China 5（SC5） was higher than South China 9（SC9）.However, there was no obvious difference bewteen SC205 ,SC5 and South China 8（SC8）