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对45个冬小麦品种不同生育期的叶片净光合速率(P_n)、气孔导度(G_s)、胞间CO_2浓度(C_i)、气孔阻力(R_s)等4个性状的研究表明:4个性状在品种间均存在较大的差异;大部分品种的净光合速率(P_n)后期显著低于盛花期以前,几乎所有品种气孔阻力(R_s)盛花后期显著地低于盛花前期,气孔导度(G_s)和胞间CO_2浓度则恰好相反;净光合速率(P_n)在盛花前期主要受气孔因素限制,盛花后期主要受非气孔因素限制。
The study on leaf net photosynthetic rate (P_n), stomatal conductance (G_s), intercellular CO_2 concentration (C_i) and stomatal resistance (R_s) of 45 winter wheat cultivars showed that four traits Most cultivars had significantly lower net photosynthetic rate (P_n) than that before flowering. The stomatal conductance (R_s) of most cultivars was significantly lower than that of the preimplantation, stomatal conductance (G_s) and The intercellular CO 2 concentration was the opposite; the net photosynthetic rate (P_n) was mainly limited by the stomatal factors in the early flowering stage, and was mainly limited by the non-stomata in the late flowering stage.