【摘要】 春季,在晴好天气条件下,用目前国外先进的光合作用测定系统——LI-6400光合仪,对杨梅的光合速率进行了测定。结果表明,杨梅的光合速率随着环境因子的变化而变化,光合速率的日变化进程为典型的单峰型,最大净光合速率为7.24μmolco2·m-2·s-1,出现在午后13时。运用相关分析和通径分析表明,对杨梅光合作用日变化直接影响最大的气候生态因子是气温,其次是大气相对湿度和光合有效辐射。更多还原

【Abstract】 Photosynthetic rate of waxberry was measured by a portable photosynthesis measuring system of Li-6400R under fine weather conditions in Zhejiang Province in the spring of 2006.Results show that the photosynthetic rate of waxberry varies with environmental factors on clear days of the spring.Its diurnal variation presents a single-peaked course with a maximum rate of 7.24μmolco2·m-2·s-1 at 13:00.Correlation and hemagogic analysis indicate that climatic ecological factors of greatest importance in daily photosynthetic change are temperature,humidity and PAR.更多还原