摘要
对两个大豆品种光合作用日变化的多次测定,结果表明:两个大豆品种的光合速率(A)日变化均呈双峰曲线,气孔阻力(R_s)的日变化与A相反,但中午时的细胞间隙CO_2浓度(Ci)只有轻微的降低,这说明中午A降低的内部因素除气孔限制外,还有非气孔因素的限制。中午时的光量子通量密度(PPFD)和大气温度(Ta)升高,相对湿度(R_H)下降,引起叶片温度(Te)的升高。
Many measurements of the daily changes of photosynthesis for two soybean cultivars indicated that the daily changes of photosynthetic rate (A) exhibited double-peak curve, stomatal resistance turned out contrary to A, and intercellular CO2 concentration (Ci) was decresed lightly in the midday. The inner cause of the midday depression included stomatal factors and nonstomatal factors. The increasing of photon flow density (PPFD) and air temperature (Ta), and the decreasing of relative humunity (RH) caused the increasing of leaf temperature of two soybean cultivars.
出处
《大豆科学》
CAS
CSCD
北大核心
1989年第1期33-38,共6页
Soybean Science
关键词
大豆
品种
光合作用
Photosynthesis Stomatal resistance Daily change Intrinsic photosynthetic capacity
