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黄淮平原麦区,春季小麦常常遭受低温寒害或晚霜冻害,给小麦生产造成极大损失,如1993年河南省商丘县因受冻害大面积小麦不能抽穗,严重地块受害植株达90%以上.1996年一些麦田也因受寒害小麦只开花而不结实,严重地块亩产只有50kg左右.小麦每次受冻都涉及到多个品种,而同一品种度冻害的程度也不同,这表明受冻害不仅和品种本身的抗寒力有关,而且和低温来临时小麦所处的的发育时期有密切关系.为此,近年来我们对小麦不同发育期与抗寒性的关系,进行了较为系统的研究,为防冻提供依据.
Huanghuai Plain wheat area, spring wheat often suffer from chilling injury or night frost damage, causing great losses to wheat production, such as Shangqiu County in Henan Province in 1993 due to frost damage large area wheat can not be heading, serious block affected plants more than 90%. In 1996, some wheat fields also suffered from blooming and unharminess due to the cold-blooming wheat, and only 50 kg per mu of land was seriously affected. Each time the wheat was affected by freezing, multiple varieties were involved, and the degree of frost damage by the same variety was also different. It is not only related to the cold hardiness of the cultivars but also to the developmental stages of wheat in the presence of low temperature.Therefore, in recent years, we have conducted a systematic study on the relationship between the developmental stages of wheat and cold hardiness , To provide the basis for antifreeze.