水稻不同插秧密度对产量及精米率的影响

以不同插秧密度对水稻产量及精米率的影响进行了研究,结果表明:水稻不同插秧密度对生育期没有影响,但对产量及精米率却有一定影响,其中以30 cm×13.2 cm的插秧密度产量最高,比对照增产4.85%,其次是30 cm×10 cm,比对照增产3.94%。随着穴距的加大,产量逐渐下降,穴距超过20 cm以上,减产幅度大。从精米率看,以30 cm×13.2 cm的插秧密度精米率最高,其精米产量也最高,比对照增产8.77%;30 cm×10 cm插秧密度的稻谷虽然比对照增产极显著,但精米率低,远远低于30 cm×13.2 cm的精米产量,且中感叶瘟病和轻微穗颈瘟及二化螟,其它处理只有轻微叶瘟的发生,却无穗颈瘟和二化螟的危害。

Effect of Planting Density on Yield and Milled Rice Rate

The effect of planting density on yield and milled rice rate were researched and the result indicated that planting density had no affect on growth period, but it had some influence on yield and milled rice rate, planting density under 30 cm × 13.2 cm can achieve highest yield which increased 4.85% than CK, secondly increased 3.94% than CK under 30 cm ×10 cm. With the increased hole distance, yield was decreased, yield reduction was greater when hole distance was over 20 cm. planting density under 30 cm ×13.2 cm can achieve highest milled rice rate and yield of white rice which increased 8.77% than CK, planting density under 30 cm ×10 cm can dramatically increase yield, but milled rice rate was low, and it had middle susceptibility on leaf blast and slight susceptibility on panicle blast and Chilo suppressalis, other treatment had slight leaf blast.