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植物利用光能将CO_2与水合成碳水化合物。构成植物体的碳水化合物,包括果实中的糖分,都是以CO_2为原料合成的。大气中CO_2的浓度大约只有0.034%(340ppm)。因此,对于提高光合效能,CO_2的含量成为重要的限制因子。随着大气中CO_2浓度的提高,作物的生长和产量也可望得到提高。在露地条件下,施用CO_2由于会立即去散到大气之中,所以没有实用的意义:但是在温室栽培条件下,则可获得良好的效果。这种
Plants use light energy to synthesize CO 2 and water into carbohydrates. The carbohydrates that form the plant body, including the sugar in the fruit, are synthesized from CO 2 as a raw material. Atmospheric CO 2 concentration of only about 0.034% (340ppm). Therefore, the content of CO 2 is an important limiting factor for improving photosynthetic efficiency. As atmospheric CO 2 concentrations increase, crop growth and yield are also expected to improve. Under open field conditions, application of CO 2 has no practical significance as it is immediately dissipated into the atmosphere: however, good results can be obtained in greenhouse cultivation. This