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采用大田随机区组设计,研究了播种量和氮肥用量对耐旱水稻新品种“绿旱1号”旱直播栽培的生长及产量影响。结果表明:随着播量的提高有效穗数增加,穗粒数和穗实粒数下降;在低播量的情况下,增加氮肥用量可提高有效穗数,但在高播量的情况下,增加氮肥用量对增加有效穗数效果不明显;播种量和氮肥用量对千粒重的影响很小;各处理中,以A3B1处理的产量最高,达11518.3kg/hm2,A2B2处理的产量次之,达11315.0kg/hm2,较对照A1B1分别增产2073.3kg/hm2、1870.0kg/hm2,增产幅度分别为21.9%、19.8%;“绿旱1号”在旱直播栽培的情况下,播量以30~45kg/hm2、全生育期氮肥用量(纯氮)在225~270kg/hm2范围为宜。
The field randomized block design was used to study the effects of seeding rate and nitrogen application rate on the growth and yield of drought tolerant direct-seeded rice cultivars “LvHan 1”. The results showed that the number of panicles per spike and the number of panicles per panicle decreased with the increase of sowing rate. In the case of low sowing rate, increasing the amount of nitrogen fertilizer increased the number of panicles per panicle, but in the case of high sowing rate, Increasing the amount of nitrogen fertilizer had no obvious effect on increasing the effective panicle number. The effect of seeding rate and nitrogen fertilizer dosage on the 1000-grain weight was insignificant. Among the treatments, the highest yield was A3181 and the second was 11318.3kg / hm2 kg / hm2, 2073.3kg / hm2 and 1870.0kg / hm2 respectively, which increased by 21.9% and 19.8% respectively compared with that of the control A1B1.In the case of direct seeding cultivation, the sowing rate was 30 ~ 45kg / hm2, the amount of nitrogen fertilizer during the whole growth period (pure nitrogen) is in the range of 225 ~ 270kg / hm2.