播期对不同基因型冬小麦籽粒灌浆特性及产量的影响

Influences of sowing date on grain filling characteristics and yield of winter wheat with different genotypes

通过田间试验研究了播期对3个不同基因型冬小麦的籽粒灌浆特性、粒质量和产量的影响.结果表明:3个品种在灌浆高峰时,早播处理的籽粒干质量大于晚播处理的;3个品种的灌浆速率变化趋势均呈单峰曲线,‘济麦20’和‘豫麦49’早播处理的前期籽粒灌浆速率慢,后期快;而‘郑麦004’始终是前期快,后期慢,但差异不明显;3个品种的单位面积穗数、穗粒数、千粒质量及产量均有随播期推迟而下降的趋势.

Based on field tests and laboratory analysis, the influences of sowing date on grain filling treat,quality and yield of winter wheat with three different genotypes were studied. The results showed that：the grain dry weight of three cultivars of winter wheat under the early sowing treatment reached higher peak than that under the late sowing treatment. The change trend of all cultivars in grain filling rate displayed a curve with single peak. Among which, the early grains of the cultivars ‘Jimai 20 ’ and ‘Yumai 49’ under the early sowing treatment had lower filling rate and the late grains had higher filling rate,while the cultivar ‘Zhengmai 004＇always presented higher filling rate of early grains and lower filling rate of late grains, but no significant difference was found. The panicle per unit area ,grain number per panicle, 1000- grain weight and yield of all cultivars decreased with putting off sowing date.