关键词: 障碍型低温冷害, 孕穗期, 抽穗-开花期, 关键期温度

Abstract: Based on the daily temperature data from 153 stations in Northeast China during 1961-2010,the climate characteristics of steriletype chilling injury in rice and its relationship with temperature at booting and blossoming flowering stage was investigated by using statistical method.The results showed that the amount of the sterile type chilling injury in rice plants decreased in most area of Northeast China with the characteristic of evident regional distribution,which had a increase trend in Jilin province at booting stage and some areas of Liaoning province at blossoming stage.The interannual fluctuation frequency of sterile type chilling injury was significant over recent 50 years,which showed a decreasing trend as a whole except for the period between 2001 and 2010.There was a significant negative correlation between temperature and cold disaster in growth period because the sterile type chilling injury was sensitive to temperature change.The cold disaster in Northeast China might reduce 35 stations with per 1℃ increaseFurther studies showed that the decrease of sterile type chilling injury,which induced by the increasing temperature during growth period,was the result of joint effects from both interannual and interdecadal change.

Key words: Sterile type chilling disaster, Booting stage, Heading to blossom stage, Temperature at key growth period