【摘要】 在人工气候室内进行的小麦光合作用与生态因子关系的研究,得到了如下结果: 1.当空气中CO₂浓度为340至350ppm,土壤含水量适中的情况下,引起光合作用“午休”的重要因素之一是中午空气相对湿度明显下降。 2.当生态环境适宜,且较稳定的情况下,未观察到光合作用“午休”现象。认为光合作用“午休”不是一个生物钟现象。更多还原

【Abstract】 It was studied in phytotron that the relations between the photosynthesis in wheat and the ecological factors. The results obtained are as follows:1. When the CO2 concentration in the air is 340 to 350ppm and the water content of the soil is moderate, one of the important factories which caused the photosynthetic ’nap’ is the obvious decrease of atmospheric relative humidity in the midday.2. When the ecological environment was moderate and more stable, the phenomenon of photosynthetic ’nap’ was not observed. It is infered that the photosynthetic ’nap’ is not a phenomenon of the biological clock.更多还原