Temporal and Spatial Distribution of Heat Damage during Heading and Flowering Stage of Rice in Hubei and Hunan Province

doi:10.3969/j.issn.1000-6362.2019.01.006

Abstract

Abstract:

Temporal and spatial distribution of early and middle rice during heading and flowering stage in Hubei and Hunan province (i.e.the two-lake region）was analyzed using the daily meteorological data of 34 meteorological sites from 1961 to 2017 year and observation data of annual growth period of 28 agrometeorological sites from 1981 to 2011. Linear regression method and ArcGIS's inverse distance weight (IDW) spatial analysis function was used in this study. The results showed that, (1) days and times of heat damage on early rice in Hubei and Hunan provinces was the most in 2000s, followed by 1960s and 2010?2017, the least in 1980s; The heat damage days and times on middle rice in Hubei and Hunan provinces was the most in 1970s, followed by 1960s and 2000s and 2010?2017 , the least in 1980s. (2) The heat damage days and times on early rice high value areas was distributed in southeastern Hubei and southern Hunan, and the low value areas was distributed in southwestern Hubei and western Hunan; The heat damage days and times on middle rice was distributed in northeastern Hubei, southeastern Hubei, southwestern Hubei, western Hunan, and southern Hunan, and low value areas was distributed in northwestern Hubei and western Hunan. (3) The heat damage times on early rice and middle rice in Hunan and Hubei is slight greater than moderate, and moderate greater than severe; The heat damage times on early rice and middle rice Hunan is more serious than Hubei; The heat damage of Hubei and Hunan middle rice is more serious than early rice.

Key words: Hubei, Hunan, Heat damage of rice, Heading and flowering stage, Temporal and spatial distribution

GUO Jian-mao, PEMA Rigzin, LIANG Wei-min, SHEN Shuang-he, JIANG Xiao-dong. Temporal and Spatial Distribution of Heat Damage during Heading and Flowering Stage of Rice in Hubei and Hunan Province[J]. Chinese Journal of Agrometeorology, 2019, 40(01): 51-61.

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