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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 effects of sowing date and planting density on grain filling, yield and yield components of typical high density and high yield variety Zhengdan 958 were studied. The results showed that with the delay of sowing date and the increase of density, the accumulation of dry matter of grains showed a decreasing trend. The filling process was delayed with the increasing of density, and the sowing date had a relatively small influence on the dry matter accumulation. Under the experimental conditions, the yield of early sowing low-density, early sowing medium density, early sowing high-density and medium sowing low-density, middle sowing medium density treatment yield higher, and the output of other treatments reached a significant level. “Zhengdan 958 ” sowing date suitable for April 21 to May 11 between the appropriate density of 45 000 ~ 67 500 plants / hm2.