Abstract: In this paper,spatial-temporal variation characteristics of heat injury on early rice and mid-season rice during booting-milky stage was analyzed using agricultural data including meteorology,rice production and agro-meteorology from 1961 to 2005 in Hubei province.The obtained conclusions were as followed: ① Heat injury on mid-season rice and early rice occurred most seriously in 1960s,the second from 2000 to 2005,respectively,similarly,the third in 1970s and the slightest in 1980s.Additionally,it became more and more serious at the beginning of the 21st century;② There were more days when heat injury took place in the east than in the west,in the south than in the north for mid-season rice,but for early rice,gradually decreased from west to east;③For mid-season rice,there were more than 20% of total years when heat injury appeared and led to more than 3% yield reduction in the east and the north-west hillock of Hubei province,10%-20% in the east of south-west,most part of the north-west,the north-east of Hubei province and Jianghan Plain.For early rice,there were more than 15% of total years when it did and led to more than 3% yield reduction in the east of Hubei province and Jianghan Plain.

Key words: Rice, Heat injury, Space-time distribution