不同栽插密度对杂交稻新优188产量构成的影响

Effect of Different Planting Density on the Yield of Hybrid Rice Xinyou 188

为水稻品种新优188筛选最适宜的栽插密度,通过不同密度处理,研究大田条件下栽插密度对新优188产量构成的影响。结果表明：新优188产量随密度（18.0万~30.0万穴/hm2）逐渐增加,在30.0万穴/hm2密度下产量最高,但在33.0万穴/hm2产量又下降,各密度处理间差异达极显著水平。在产量构成中有效穗数受影响最大。新优188较为适宜的栽插密度在30.0万穴/hm2左右,各产量构成因素之间可发挥最大增产潜力。

The research aimed to screen the suitable planting density for Xinyou 188.To investigate the effect of planting density on the yield,we treated Xinyou 188 at different planting density under a paddy field.The results showed that yield of Xinyou 188 rose up with the gradual increased density from 180 000 to 300 000 points per hectare and reached the highest at the density of 300 000 points per hectare,but declined at 330 000 points per hectare.The differences were highly significant among the different density treatment.The number of effective panicles was the most important component in yield structure.The appropriate planting density of Xinyou 188 was about 300 000 points per hectare.The factor that influenced yeild could maximize the potential to increase the production.