不同大豆品种光合特性的比较  

Comparison on Photosynthetic Characteristics of Different Soybean Varieties

作　　者：张伟[1] 宋显军[2] 谢甫绨[3] 闫晓艳[1] 邱强[1] 石一鸣[1] 

机构地区：[1]吉林省农业科学院大豆研究中心,吉林长春130033 [2]黑龙江省农业科学院信息中心,黑龙江哈尔滨150086 [3]沈阳农业大学农学院,辽宁沈阳110161

出　　处：《大豆科学》2008年第3期391-396,共6页Soybean Science

基　　金：“十一五”国家科技支撑计划重点项目资助项目(2006BAD521B01-2-1)

摘　　要：作物光合作用与产量密切相关,为了探讨大豆品种光合特性差异,选用不同的大豆品种对光合速率,光合日变化等光合特性进行研究。结果表明:不同品种在整个生育期间叶片光合速率动态变化不同,有的品种前期光合速率高,后期衰减较快,有的品种则相反,有的品种整个生育期光合速率都较高;不同节位叶片光合速率从壮龄叶开始向下呈下降趋势,但品种间的下降幅度差异显著;不同品种叶片正面、背面光合速率相差较大,不同生育时期背面光合速率占正面光合速率比率也不同;不同环境下品种间光合日变化差异很大,在相同环境下由于各品种对外界环境适应能力不一样,使日变化仍有较大差异。因此,选择高光效品种时应兼顾各项光合特性指标。Crop production and photosynthetic characteristics are closely related. To investigate the differences between the photosynthetic characteristics of different soybean varieties ,field trails were conducted using 7 semi- determinate and 3 determinate soybean cultivars during 2003-2006 year. The photosynthetic rate （Pn）of different nodes at R1, R4 and R6 stage, diurnal changes of Pn under red- blue light source and natural light source at flowering and podding, and Pn of both sides of leaf at flowering and podding were determined. The results showed that i ） the dynamic changes of Pn during the whole growth period were different among soybean varieties ,some varieties had higher Pn in former stage and decreased quickly in latter stage, some behaved otherwise, and there still some varieties had a higher Pn during the whole growth period; ii ）The Pn showed a decreasing trend from under the pubescent leaf,and the degree varied with varieties; iii） The Pn of front and opposite side of leaves varied greatly, and the ratio of opposite side to front side was different at different growth stages ; iV ） Diurnal changes of Pn varied with varieties and environments. Even under the same environment, diurnal changes of photosynthetic rate still varied greatly with varieties. It is conclueded that selectiing of high photosynthetic efficiency soybeanshould take into account of various indicators of photosynthetic characteristics.

关 键 词：大豆 光合速率 光合速率日变化 

分 类 号：S565.1[农业科学—作物学]