以金优527和F优498等2个杂交稻品种为材料进行了田间试验,研究不同播种量对油后直播杂交稻产量及其构成因素的影响。其结果表明:在一定范围内,增大播种量可有效增大成株密度、单位面积最高茎蘖数和有效穗数;但随着播种量的增加,成穗率降低,单株有效穗数减少,每穗总粒数和每穗粒重显著降低。2个品种的产量都以播种量15~18 kg/hm2为最高。 Field experiments were conducted with two hybrid rice varieties, Jinyou 527 and F You 498, to study the effects of different seeding rates on the yield and its components of direct seeding hybrid rice. The results showed that: within a certain range, increasing the sowing rate could effectively increase the plant density, the highest number of tillers per unit area and the effective panicle number. However, with the increase of sowing rate, the panicle rate decreased and the panicle number per plant decreased , The total number of grains per panicle and grain weight per ear decreased significantly. The yield of the two cultivars was the highest with 15-18 kg / hm2 seeding rate.