油后直播杂交稻成株密度与其产量性状的相关性研究

Correlation Analysis on Density and Yield Traits of Direct Sowing Hybrid Rice after Rape Harvest

[目的]探讨油后直播杂交稻适宜的成株密度。[方法]以F优498、金优527和中优838为材料进行田间试验，研究油后直播杂交稻成株密度与其产量性状的相关性。[结果]油后直播杂交稻成株密度与单位面积有效穗数呈极显著正相关，与每株穗数、穗着粒数、穗实粒数及单穗重呈极显著负相关，与单位面积产量呈不显著正相关，与结实率和千粒重的相关性在品种间存在差异。[结论]与参试品种性状相近的杂交稻品种，将其成株密度控制在20～30株／m^2范围有利于获得较高产量。

[ Objective ] The aim was to explore the suitable density of direct sowing hybrid rice after rape harvest. [ Method] Choosing the hy-brid rice variety Fyou 498 ,Jinyou 527 and Zhongyou 838 as material, the correlation between density and yield traits were studied by field test. [ Result ] The results showed that the density was significant positive correlated with the effective panicles number per unit area and significant negative correlated with the panicles per plant, the number of gains per ear, the number of full gains per ear and weight per ear. The positive correlated with the yield was not significant and the correlation with seeding rate and thousand seed weight were different between the varieties. [ Conclusion] The density 20 to 30 plants/m^2 was helpful to obtain higher yield according to the similar hybrid rice variety with the test variety.