本文介绍了将麦类作物叶片置于0℃下,测定叶片荧光反应减少50%所需的时间来鉴别作物耐寒性的方法。此法用于试验后表明,将小麦、大麦和黑麦叶片保持在0℃下,抗寒与不抗寒材料在荧光反应时间长短的变化上是有区别的,而且这种反应与抗寒性是相关的。为模拟由厚冰覆盖对活体的伤害程度,将小麦叶片置于0℃的氮气中,耐冰覆盖的冬小麦品种 Kharkov 的荧光速率下降得比春小麦品种 Gatcher 的慢。 This article describes a method for identifying cold tolerance in crops by placing the leaves of the wheat crop at 0 ° C and measuring the time it takes for the leaf fluorescence response to decrease by 50%. This method was used to test showed that the wheat, barley and rye leaves at 0 ℃, cold and non-cold materials in the fluorescence reaction time length of the change is different, and this reaction and cold resistance Is relevant. To simulate the degree of damage to the living body covered by thick ice, the fluorescence of Kharkov, an ice-covered winter wheat cultivar, was reduced to slower than that of the spring wheat cultivar Gatcher by placing wheat leaves in nitrogen at 0 ° C.