播期与密度对郑单958产量形成的影响

Influence of Sowing Time and Density on Yield Formation of Zhengdan958

以典型耐密高产品种“郑单958”为试材,研究播期与密度对其子粒灌浆和产量及产量构成因素的影响。研究结果表明,随播期推迟和密度增加,子粒干物质积累量呈降低的趋势;灌浆进程随密度增大而延迟,播期对其影响相对较小。本试验条件下早播低密、早播中密、早播高密与中播低密、中播中密处理下产量较高,与其他各处理产量差异达到显著水平。“郑单958”适宜播期在4月21日至5月11日之间,适宜密度为45 000~67 500株/hm2。

The typical close-resistant high-yielding variety Zhengdan958 was used as the material to study the effect of sowing date and density on the grain filling, yield and yield component factors. The results showed that with the sowing date postponed, and the density increases, grain dry biomass accumulation showed a decreasing trend, grouting process delayed with the density increases, the impact of sowing date is relatively small. The treat- ments as early sowing and low-density, early sowing and medium-density, early sowing and high-density, medium sowing and low-density, medium sowing and density produced high yields, the yields different from other treatments and reached a significant level. Suitable sowing date of ＂Zhengdan958＂ was between April 21 to May 11, and densi- ty of 45 000-675 00 plants/ha.