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一CO_2对水稻光合作用、生长及产量的影响CO_2对叶片光合作用的影响,取决于日照和温度.通常在温度和日照适宜范围内,大气CO_2浓度增至300ppm以上,便能提高许多植物叶片的光合强度.早期的研究表明,CO_2浓度增至500ppm左右,水稻叶片光合强度显著提高,倘若超过500ppm,则其叶片光合强度不变.但是在高温条件下,甚至处于光强度较低的环境,500ppm水平仍然没有呈现CO_2饱
Effect of CO_2 on Photosynthesis, Growth and Yield of Rice Leaves The effects of CO_2 on the photosynthesis of leaves depend on the sunshine and temperature.Under the appropriate temperature and sunshine conditions, increasing the atmospheric CO_2 concentration above 300ppm can increase the photosynthesis of many plant leaves Photosynthetic intensity.Early studies have shown that the CO 2 concentration increased to about 500ppm, rice leaf photosynthetic intensity increased significantly, if more than 500ppm, the leaves photosynthetic intensity unchanged.However, at high temperatures, even in low light intensity environment, 500ppm The level is still not present CO_2 full