摘要： 本试验于1987、1988两年,利用红外CO₂气体分析仪研究了不同枣树品种的光合特性.枣树的光补偿点为400～1200Lx,光饱和点为30～43KLx,光合速率为6～16mgCO₂·dm^-2·h^-1,品种间差异显著.枣树光合速率的年变化、日变化均为双峰曲线,中午有明显的“午休”现象.

关键词: 枣树, 光合作用, 光饱和点, 光补偿点, 光合速率

Abstract: The photosynthetic characteristics of different varieties of Chinese jujube (Z.jujube mill) were studied with infra-red CO₂ analyser from 1987 to 1988.The range of the light compensation points was from 400 to 1200Lx,that of the light saturation points was from 30 to 43 KLx，and that of the photosy-nthetic rates was from 6 to 16 mg CO₂dm^-2 ·h^-1，there are significant differences among the testing cultivars.The year change and the daily change of the photosynthetic rates were all double peak curve，the appearance of "midday nap" is clear.

Key words: Chinese jujube, Photosy nthesis, Light compensation point, Light saturation point, Photosynthetic rate