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对来自不同生态条件下10个小麦品种的观测表明,各种条件下叶片光合速率品种间均有差异。叶片光合速率对光强、温度、土壤水分变化的反应明显不同。土壤含水量为5.2%时,叶片光合速率呈负值或接近零。短期土壤干旱后复水,叶片光合速率可恢复近原水平。随土壤干旱加剧,叶片暗呼吸速率增加。
Observations on 10 wheat cultivars from different ecological conditions showed that there was a difference in leaf photosynthetic rate under various conditions. Leaf photosynthesis rate of light intensity, temperature, soil moisture changes significantly different response. When the soil water content was 5.2%, the photosynthetic rate of leaves was negative or close to zero. Short-term soil rehydration after drought, leaf photosynthetic rate can restore the level of near-original. With the aggravation of soil drought, leaf dark respiration rate increased.