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我们在标准(350微巴)CO_2分压和高(700微巴)CO_2分压条件下,温度为28/21℃和33/26℃的定温室里,培育水稻(品种是日本晴)。在营养生长期,用加倍提高 CO_2分压的方法,促进了水稻的生长,使水稻的分蘖枝数、叶面积和干重分别增加了60%、70%和94%。根重的大量增加减少了高 CO_2作物的根茎比率(T/R)。在水稻成熟期,在高 CO_2条件下生长的水稻主茎上少一片叶子,出穗提前六天,产生了更多的有效分枝。在高 CO_2条件下生长的水稻,由于每穗的谷粒数目增多(而不是由于谷粒重量的加重),其产量提高23～72%。在33/26℃条件下,水稻对高 CO_2的灵敏度大于其在28/21℃条件下的灵敏度。
We breed rice (variety Nipponbare) in a constant temperature room of 28/21 ° C and 33/26 ° C at standard (350 mbar) CO 2 partial pressure and high (700 mbar) CO_2 partial pressure. During vegetative growth, the method of doubling CO2 partial pressure promoted the growth of rice and increased the number of tillers, leaf area and dry weight of rice by 60%, 70% and 94% respectively. A substantial increase in root weight reduced the root / shoot ratio (T / R) of high CO2 plants. At the ripening stage of rice, fewer leaves grow on the main stem of rice under high CO 2 conditions, leaving the ear six days earlier, resulting in more effective branches. Rice grown under high CO 2 production increased 23-72% due to an increased number of grains per panicle rather than an increase in grain weight. Under the conditions of 33/26 ℃, the sensitivity of rice to high CO_2 is greater than its sensitivity at 28/21 ℃.