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几年来。由于越冬期冻害,我省冬小麦单产和复种指数明显降低,种植面积由120万亩缩减到60万亩。严重地影响了小麦生产的发展。因此,除了改善生产条件、提高栽培水平之外,选育抗寒性强的优良冬小麦新品种,已成为发展冬小麦生产的重要前提之一。过去国内有人进行过不同抗寒品种在幼苗形态和生长习性方面的研究,但未涉及品种选育问题。我们的试验,是以抗寒性不同(主要以越冬成活植株百分率表示)的冬小麦品种为材料,探索其各生育阶段植株形态的表现,为选育强抗寒性的冬小麦品种提供依据。
Years ago Due to the winter frost damage, our province’s winter wheat yield and multiple crop significantly decreased, the acreage from 120 million mu to 600,000 mu. Seriously affected the development of wheat production. Therefore, in addition to improving production conditions and raising the level of cultivation, it is one of the important prerequisites for the development of winter wheat to breed new winter wheat varieties with high cold resistance. In the past, some domestic researchers conducted researches on seedling morphology and growth habit of different cold-resistant varieties, but did not deal with the breeding of varieties. In our experiment, the winter wheat cultivars with different cold resistance (mainly the percentage of overwintering plants) were used as materials to explore the morphological characteristics of the plants at each growth stage and provide the basis for selecting winter wheat varieties with strong cold tolerance.