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合理的播种期和种植密度有助于挖掘小麦品种的产量潜力。利用裂区试验研究了播种期和种植密度对小麦新品种豫农202产量及其构成因素的影响。结果表明:播种期对小麦新品种豫农202的产量及其构成因素影响较小,除对穗数的影响达到显著水平外,其他均不显著。种植密度则影响较大,除对千粒重的影响不显著外,其他均达到显著或极显著水平,特别是对穗数和穗粒数影响的显著程度非常高。在不同的播种期下各种植密度间产量差异较大,但产量构成因素差异较小。在不同播种期和种植密度下,穗数对产量的直接影响较大,其次是穗粒数,千粒重的直接影响很小。该品种的适宜播种期应该在10月8—25日,早播情况下选择120万株/hm2基本苗比较合适,中晚播情况下选择240万株/hm2。
Reasonable sowing date and planting density help to tap the yield potential of wheat varieties. The effects of sowing date and planting density on the yield and its components of a new wheat cultivar ’Yunnong 202’ were studied by split-plot test. The results showed that the sowing date had little effect on the yield and its components of a new wheat cultivar “Yu Nong 202”, except for the significant effect on the number of ears. The planting densities had a greater impact, except for the effects of 1000-grain weight were not significant, the other reached significant or extremely significant level, especially the significant impact on the number of ears and grains per spike. Under different sowing dates, the yields of different planting densities differed greatly, but the differences of yield components were small. At different sowing dates and planting densities, the spikelet number had a direct impact on the yield, followed by the spikelet number and the direct effect of 1000-grain weight. The appropriate sowing date for this variety should be from August 8 to 25, with 1.2 million basal / hm2 basal seedlings suitable for early sowing and 2.4 million hm2 for late sowing.