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为了给北五味子栽培提供科学参考,研究了2种栽培模式下的北五味子叶片净光合速率日变化以及环境因子对其的影响效应。利用CI-340型光合作用测定系统,测定了北五味子叶片净光合速率和环境因子的日变化,考察了环境因子对净光合速率日变化的影响。结果表明,与人工栽培模式相比,仿生态栽培模式的光饱和点(LSP)、光补偿点(LCP)、CO2饱和点(CSP)、CO2补偿点(CCP)和比叶重(SLM)呈下降趋势,而表观量子效率(AQY)和Chla/b呈上升趋势。此外,人工栽培模式下五味子存在“光合午休”现象,仿生态栽培模式则没有。仿生态栽培模式下的五味子表现出较强的光合适应性。影响2种栽培模式的北五味子叶片光合作用的主要环境因子是光照强度(PAR)、环境CO2浓度(Ci)、叶面温度(Tleaf)及空气相对湿度(RHin)。
In order to provide a scientific reference for the cultivation of Schisandra chinensis, the diurnal variation of net photosynthetic rate and the effect of environmental factors on Schisandra chinensis under two cultivation modes were studied. The diurnal variation of net photosynthetic rate and environmental factors in Schisandra chinensis leaves were determined by CI-340 photosynthesis system. The effects of environmental factors on diurnal variation of net photosynthesis rate were investigated. The results showed that the light saturation point (LSP), light compensation point (LCP), CO2 saturation point (CSP), CO2 compensation point (CCP) and specific leaf weight (SLM) While the apparent quantum yield (AQY) and Chla / b showed an upward trend. In addition, the artificial cultivation mode Schisandra “photosynthesis lunch break” phenomenon, imitation ecological cultivation mode is not. Schisandra chinensis under simulated ecological cultivation mode showed strong photosynthetic adaptability. The main environmental factors affecting the photosynthesis of the leaves of two Schisandra chinensis cultivars were light intensity (PAR), ambient CO2 (Ci), leaf surface temperature (Tleaf) and air relative humidity (RHin).