不同产量水平粳稻品种间比较

对高、中、低产粳稻品种的株高、穗长、有效穗、颖花数、结实率、千粒重、一次枝梗数、二次枝梗数、一次枝梗粒数、二次枝梗粒数、生物产量进行比较,认为高产、中产、低产品种在颖花数、结实率、一次枝梗数、二次枝梗数、一次枝梗粒数、二次枝梗粒数、生物产量和有效穗数上存在差异,表现为高产品种较高,中产品种次之,低产品种最低,有效穗数表现相反趋势。另外,不论是高产品种还是低产品种,结实率均随颖花数的增加而变小,在相同颖花数量条件下,高产品种的结实率普遍高于低产品种。

Compare of Different Yield Level Japonica Varieties

By compare of plant height, panicle length, number of efficient panicle, sparklets, rate of setting, thousand-seeds weight, number of first twigs, number of second twigs, number of first twig seeds, number of second twig seeds, biological yield of high-yield, mid-yield and low-yield varieties, it is fond that the great differences lie in the sparklets, rate of setting, number of first twigs, number of second twigs, number of first twig seeds, number of second twig seeds, biological yield and number of efficient panicles. The result shows that the high-yield varieties are the highest, mid-yield varieties are the second, low-yield varieties are the lowest, but the number of efficient panicles is the reverse trend. No matter the high-yield varieties or low-yield varieties, the rate of setting decreases follow increase of sparklets. Under the same number of sparklets, the rate of setting of high-yield varieties is usually higher than of low-yield varieties.