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北方冬麦区,往往在越冬期间大面积的发生小麦冻害,造成严重的减产。如去冬今春北京地区冬麦受冻死亡率达20—30%,导致小麦最少减产达20%以上。这里仅就如何提高小麦抗冻性的问题,提出一些意见,供参考。一、选用抗冻品种不同的小麦品种具有不同的抗冻能力,一般来说,来源于高纬度或高海拔地区的品种抗冻性都比较强,这是在引种时应注意的一个重要方面。但是也不尽然,由于各年份气温和雪雨量的变化,有些品种潜在的抗寒性不能表现出来,特别是对那些新育成的品种
Northern winter wheat area, often during the winter over a large area of wheat frost damage, causing serious cuts. Such as winter and spring this winter Beijing winter wheat freezing mortality rate of 20-30%, resulting in wheat production reduced at least 20%. Here only on how to improve the frost resistance of wheat, put forward some suggestions for reference. First, the selection of anti-freezing varieties of different wheat varieties have different frost resistance, in general, derived from high latitudes or high altitude varieties are relatively strong frost resistance, which is introduced in the introduction of an important aspect. However, it is not always true that the potential cold hardiness of some varieties can not be demonstrated due to changes in temperatures and snowfall over the years, especially for those newly bred