很早就晓得,土壤中的CO_2被植物根吸收,可做为光合作用的基质。近几年,由天正、叶田等做了水稻根吸收CO_2在禾本科植物中有其特殊性的报道以来,为了弄清这一特异性的原因以及稻根吸收的CO_2对于物质积累起多大作用而进行了试验。在禾本科植物中,水稻根吸收的CO_2不仅其数量多,而且还具有被吸收的CO_2向地上部输送比率高的特点,显出向地上部转移速度快的特异性。为了明确水稻的这种特异性的原因,认为、解释CO_2的吸收和向地 It has long been known that CO2 in the soil is absorbed by the plant roots and serves as a substrate for photosynthesis. In recent years, Tianzheng, Ye Tian and other rice roots to do the absorption of CO2 has its peculiarities reported in grasses, in order to clarify the specificity of the reason and the rice root absorption of CO 2 for material accumulation played a big role And conducted a test. In gramineous plants, the CO 2 uptake by rice roots is not only large in number but also high in the rate of uptake of CO 2 into shoots, indicating the rapid transfer of CO 2 to shoots. In order to clarify the reason for this specificity of rice, it is thought that explaining the absorption of CO2 and toward the ground