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所谓低温冷害,就是在农作物生长发育过程中出现低于正常生长发育需要的温度,甚至低于生长发育所需的低限温度,因而抑制或阻碍农作物的正常生长发育,造成减产或绝收。一般说,低温冷害分为障碍性冷害和延迟性冷害两种类型。障碍性冷害,是在农作物孕穗、开花或结实过程中,出现低于作物发育所需的低限温度,阻碍作物的孕穗、开花、结实正常进行,造成减产的冷害;延迟性冷害,是在农作物生长全过程或在某一阶段出现较长时间的低于正常生长发育的低温,使作物的生长期延迟,在初霜到来之前不能正常成熟而减产的冷害。一般能成为灾害的早霜,大
The so-called low-temperature chilling injury, is the crop growth and development below the normal growth and development needs of the temperature, or even lower than the minimum temperature required for growth and development, thereby inhibiting or hinder the normal crop growth and development, resulting in reduced production or harvest. In general, cold damage is divided into two types of cold and delayed chilling damage. Obstacle chilling injury occurs during the process of booting, flowering or fruiting of crops, which is below the lower limit temperature required for crop development, hindering the booting of crops, flowering and fruiting, and causing chilling injury of reduced production. Delayed chilling injury is caused in crops Growth during the whole process or at a certain stage of the emergence of a longer period of time lower than the normal growth and development of low temperature, the crop growth delay, before the arrival of the first frost can not mature and reduce the production of chilling injury. Generally can be a disaster early frost, big