播期对豫麦49-198群体质量和产量性状的影响

Effect of Sowing Date on Population Quality and Yield Characters of Winter Wheat Cultivar Yumai 49-198

为了给生产上大面积推广豫麦49-198提供适宜播期,以豫麦49-198为材料研究了不同播期对群体质量及产量的影响。结果表明,最高群体总茎数随播期推迟而下降,早播的最终成穗数较少;最大叶面积指数随播期推迟而降低,孕穗后早播的叶面积指数衰减快;就花后干物质积累而言,以适播的最多,晚播次之,早播最少。不同播期间籽粒产量呈现出适播>晚播>早播,且不同播期的产量差异达显著水平;适播的穗粒数与千粒重较其它播期的有所下降。在基本苗195万/hm2情况下,河南中部地区豫麦49-198的适宜播期是10月12日,此期播种有利于创建合理的群体结构、实现高产。

In order to provide suitable sowing date for the large - scale extension of winter wheat eultivar Yumai 49 - 198, the effects of different sowing dates on the population quality and yield eharaeters of this eultivar were studied. The results indicated the highest stern number decreased along with the delay of sowing date. Of all sowing dates the final ear number of Yumai 49 - 198 sown earlier was less. The highest leaf area index decreased along with the delay of sowing date. The leaf area index of Yumai 49 - 198 sown earlier decreased faster than that sown later after booting stage. The dry matter accumulation after anthesis was the most when Yumai 49 - 198 was sown on Oetober 12, followed by late sowing treatment and early sowing treatment. The effect of sowing date on grain yield was signifieant. Of all sowing dates the grain yield of Yumal 49 - 198 sown on October 12 was signifieantly higher than that sown on Oetaber 5 and October 19. Considering synthetieally, it was the most propitious for Yumai 49 -198 to build reasonable.population structure and realize high grain yield in the middle of Henan province when the basic seedlings was 1950000 per hectare.