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1.低温冷害的概念作物遭受了低于其生育适温的连续低温影响,生育延迟,甚至发生生理障碍,造成迟熟减产,称为低温冷害.作物各生育阶段的生育适温不同,各生育阶段冷害的临界温度也不一致.如晋杂4号高粱发芽的临界温度是8℃左右,低于8℃时种子就要受害,发芽率降低;而幼穗分化期的临界温度为20℃左右,低于20℃就使幼穗分化延迟.
1. The concept of low temperature chilling injury Crops suffered below the low temperature of their reproductive hypothermia, fertility delay, or even physiological disorders, resulting in late maturing, known as low temperature chilling injury. The critical temperature of stage chilling injury is also inconsistent .Such as 4 on the 4th sorghum germination critical temperature is about 8 ℃, less than 8 ℃ when the seeds will suffer, the germination rate decreased; young panicle differentiation of the critical temperature of about 20 ℃, Below 20 ° C delayed spike differentiation.