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通过不同品种冬小麦的播期试验,探究在正常偏暖年份下,北京地区继续种植冬性品种小麦和提高偏春性小麦品种种植比例的可能性,并利用播期调整减少抗寒性相对弱的品种的产量损失。结果表明,与9月下旬常规播种相比,北京地区目前可以适当推迟冬小麦播期,10月中旬前均可种植,品种选择应以冬性和半冬性品种为主;10月上旬以后播种的冬小麦,冬前难形成壮苗,容易遭受冻害影响,特别是偏春性品种,但可通过提高播量和选种抗寒品种减少产量损失。
Through the sowing dates of different varieties of winter wheat, we explore the possibility of planting winter wheat varieties and increasing the planting proportion of spring wheat varieties in Beijing under the normal warming years, and using sowing date to reduce the relative weakness of cold resistance Yield loss of varieties. The results showed that, compared with the conventional sowing in late September, Beijing could delay the sowing date of winter wheat properly till the middle of October, and the varieties should be mainly winter and semi-winter varieties. The sowing date after the first half of October Winter wheat, hard to form strong seedlings before winter, vulnerable to frost damage, especially the spring varieties, but by increasing the sowing and selection of cold-resistant varieties to reduce yield losses.