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以不同穗型水稻品种为试材,研究不同氮素水平下水稻产量性状的结果表明:直立穗品种的 生物产量高于弯曲型品种,经济系数低于弯曲型品种。在低氮条件下,两品种的经济系数均提高,且 弯穗型品种的经济产量略高于直穗型品种,在高氮条件下则相反。在相同肥力下,抽穗前两品种的物 质生产差异不大,但抽穗后直穗型品种的物质生产明显高于弯穗型品种。同时发现在低氮条件下,两 品种的穗数明显减少,但穗粒数增多,结实率提高,一、二次枝梗的千粒重均高于高氮处理。
The results of rice yield traits under different nitrogen levels showed that the biological yield of erect panicle varieties was higher than that of curved varieties and the economic coefficient was lower than that of curved varieties. Under low nitrogen conditions, the economic coefficients of both cultivars increased, and the economic yield of bent ear cultivars was slightly higher than that of straight cultivars, while the opposite was observed under high nitrogen conditions. Under the same fertility, the material production of the two cultivars before heading was not significantly different, but the material production of straight-ear cultivars after heading was significantly higher than that of curved ear cultivars. At the same time, under the low nitrogen condition, the spike number of two cultivars decreased obviously, but the grains per spike increased and the seed setting rate increased. The 1000-grain weight of the primary and secondary branches was higher than that of the high-nitrogen treatment.