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以南粳9108及其亲本为材料,研究在大田栽培条件下优质高产迟熟中粳品种南粳9108在产量形成的关键时期的生长和光合生理指标、光强-光合响应曲线,并在成熟期考察其产量构成因子。结果表明:南粳9108的单株实际产量比亲本均显著提高,比亲本武香粳14提高7.7%,大库和大粒是其高产的重要结构基础。进一步分析生长指标,南粳9108在开花后14 d内具有较大的绿叶面积以及倒三叶的较小叶基角,其群体的光合能力较强;供试材料剑叶开花后14 d光合作用对光强的光合参数分析,南粳9108的光合能力与亲本武香粳14类似,但显著低于亲本关东194;而通过光合作用对光响应的直角双曲线修正模型分析,其对光强更容易饱和,且容易发生光抑制。可见,高产水稻南粳9108具有良好的株型、穗粒结构以及较高的群体光合能力。进一步提高其单叶光合能力,将是其发挥超高产潜力的重要途径。
Taking Nanjing Japonica 9108 and its parents as materials, the growth and photosynthetic characteristics, light intensity and photosynthesis response curve of middle Japonica rice variety Japonica 9108 with medium and high yielding late maturing cultivars under field cultivation were studied in the mature stage Investigate its yield components. The results showed that the actual yield of Nanjing Japonica 9108 was significantly higher than that of its parent, 7.7% higher than that of Wuxiang Japonica 14, and the big base and big grain were the important structural basis of its high yield. Further analysis of the growth index showed that Nanjing Japonica 9108 had larger green leaf area within 14 d after flowering and smaller leaf base angle of inverted clover, and its photosynthetic ability was stronger. The photosynthesis of flag leaf at 14 d after flowering For photosynthetic parameters of light intensity, the photosynthetic capacity of Nanjing Japonica 9108 was similar to that of its parents, Wu Xiangjing 14, but significantly lower than that of its parent, Guandong 194. Through the analysis of right angle hyperbola correction model of light response to photosynthesis, Easily saturated, and prone to light inhibition. It can be seen that the high-yielding rice Nanjing Japonica 9108 has good plant type, spike grain structure and higher photosynthetic capacity. To further improve its single leaf photosynthetic capacity, it will be its important way to play the potential of high yield.