【摘要】 为了探索旱直播在辽宁稻区的应用前景，以辽粳436为试材进行机械穴直播，分析了不同穴距处理下群体和产量构成因素的差异及其相关性，并通过回归分析明确了各性状对产量的影响。结果表明，不同穴距处理下基本苗、大穗数、小穗数、总穗数和产量存在明显差异，穴距11 cm时，辽粳436产量最高。产量与基本苗、穗苗比、大穗数、总穗数和穗粒数呈显著或极显著相关。回归分析显示，穗苗比对产量有明显的抑制作用，总穗数对产量有促进作用。更多还原

【Abstract】 In order to explore the application prospects of dry direct seeding in Liaoning rice area, Liaojing 436 was used to be planted by mechanical dry hill seeding. The difference and correlation of the population factors and yield components under different hill spacing treatments were analyzed, and the influence of these traits to the yield was clarified by the regression analysis. The results showed that there were significant differences in the basic seedlings, big panicle number, small panicle number, total panicle number and the yield under different hill spacing treatments, and Liaojing 436 gained the highest yield under 11 cm hill spacing. The yield was significantly or extremely significantly correlated with the basic seedlings, panicle-to-seedling ratio, big panicle number, total panicle number and grain number per panicle. The regression analysis indicated that the panicle-to-seedling ratio had the negative effect on the yield, while total panicle number had the positive effect.The yield were able to be further promoted by reasonable control of panicle-to-seedling ratio and the increase of the total panicle number in Liaoning rice area.更多还原