摘要
1986—1987年间,用LI-1600稳态气孔计测定大豆7个品种叶片蒸腾速率表明:大豆开花期叶片蒸腾速率高于结荚期。植株中上部节位叶片蒸腾速率较大。一日中蒸腾速率高峰值在14时,日进程呈单峰曲线。供试品种间蒸腾速率存在差异,尤其高产品种中午叶片蒸腾速率明显高于老品种。蒸腾速率与气孔阻力呈负相关,与光量子流密度、叶温呈正相关。
The leaf transpiration and stomatal resistance to air diffusion of 7 soybean (Glycine max. (L.) Merr.) cultivars were determined with Li-1600 Steady State Porometer during blooming and podding stages. The transpiration rate in flowering stage was higher than that in podd ing stage, and it was higher in upper node leaves than that in other node leaves. The diurnal changes of leaf transpiration rate showed a single peak curve and the highest value appeared at 14 : 00 O'clock. The difference of transpiration rates exists between different cultivars. The noon transpiration rate was higher in high yeilding cultivars than that in Farmer's varieties. There is negative correlation between tra-spiration rate and stomatal risistance to air diffusion and positive correlation between transpiration rate and density of photo flow or leaf temperature.
出处
《大豆科学》
CAS
CSCD
北大核心
1989年第3期271-275,共5页
Soybean Science
关键词
大豆
叶片
蒸腾速率
气孔阻力
Soybean Transpiration rate Stomatal resistance
