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为了明确杂交谷的光合优势是否是其产量高于常规谷的一大主因,本研究于2013年对常规谷晋谷21号和杂交谷张杂谷5号的光合和叶绿素荧光特性进行比较。采用完全随机设计,每个品种种植5个小区,在拔节期和灌浆期分别测定各项光合指标。结果表明,在拔节期,张杂谷5号的净光合速率、PSⅡ实际光化学量子产量显著高于晋谷21号;但在灌浆期,张杂谷5号和晋谷21号之间的总叶绿素含量、净光合速率、蒸腾速率、气孔导度、胞间CO2浓度、PSⅡ实际光化学量子产量、光化学淬灭参数和非光化学淬灭参数都存在显著差异。总体杂交谷在拔节期和灌浆期的光合性能高于常规谷。
In order to determine whether the photosynthetic dominant position of hybrid valley is one of the major reasons for its yield higher than conventional valleys, this study compared the photosynthetic and chlorophyll fluorescence characteristics in 2013 of conventional valley Jingyugu 21 and hybrid valley zhangzugu 5. Using a completely random design, each plot planted five plots, each of the photosynthetic indicators were measured at the jointing and filling stages. The results showed that at jointing stage, net photosynthetic rate and actual photochemical quantum yield of PSⅡ in Zhangzanggu 5 were significantly higher than those in Jingu 21; however, during the filling stage, the total chlorophyll content of Zhangzagya 5 and Jingu 21 There were significant differences in content, net photosynthetic rate, transpiration rate, stomatal conductance, intercellular CO2 concentration, PSⅡ actual photochemical quantum yield, photochemical quenching parameters and non-photochemical quenching parameters. The photosynthetic performance of the general hybridization valley at jointing and filling stage was higher than that of conventional valley.