不同种植规格对杂交水稻江优919生长及产量的影响

为确定杂交水稻江优919的适宜手插密度，采用两因子随机区组设计，在天柱县和石阡县开展了不同种植规格试验研究。结果表明：密度与有效穗数、穗实粒数等产量构成因子密切相关；同一密度、相同株距、不同的宽窄行设置对产量形成有一定影响；天柱点适宜手插密度为13468～14815穴／667m2，株距在15～16．5cm之间，30cm等行距种植；石阡点适宜手插密度为10870穴／667m2，株距为23．1cm，行距设置为36．6＋16．5cm或33．3＋19．8cm，平均为26．55cm。

Effects of Different Planting Spacing on Growth and Yield of Hybrid Rice Variety Jiangyou 919

To confirmed the reasonable manual planting density,using two factor of the randomized block designs,different spacing on hybrid rice variety Jiangyou 919 was conducted in Tianzhu and Shiqian county. The results showed that there was close relationship be-tween planting density with effictive panicle of unit area and grain number of per panicle. Same planting density and same planting dis-tance but different spacing settings had certain influence on rice theoretical yield. In Tianzhu,the appropriate density for Jangyou 919 was 13468-14815 hills/667m2 ,the planting distance was 15cm to 16. 5cm and spacing was 30cm;However ,planting density of 10870 hills/667m2 in Shiqian that the planting distance was 23. 1cm and spacing setting of 36. 6cm+16. 5cm and 33. 3cm+19. 8cm , average of 26. 55cm were appropriate to apply on rice production.