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- W2381427382 abstract "South China was exposed to an extreme weather of low temperature, ice rain and heavy snow in January 2008. This unusual ice-frozen weather caused serious damage to winter rape. Investigating by random sampling rape grower indicated that affected area accounts for 77.8% of the overall winter rape area in the country, including areas in Hubei, Hunan, Jiangxi, Anhui, Guizhou, Yunan, Jiangsu, Zhejiang, Shanghai. Total sample number was 10 050 in dividual rape plant, in which 22.0% of plant showed no injury, and ones had gentle and moderate injury accounts for 34.4% and 30.7% respectively, with 1 and 2 grades freeze injury indexes. About 11.9% plant suffered a severe injury with 3 grades freeze injury index and 1.0% suffered lethal frozen injury with 4 grade freeze injury index. The mean freeze injury index was 33.9 of all areas in China. The most seriously damaged area was along Yangtze River, which at about 27 degree north latitude, and covered West and South of Hunan, North of Guangxi,South of Jiangxi, South of Zhejiang, most of Guizhou and North of Yunnan areas. Our results showed that most damaged plant recovered well from freeze injury in two weeks when snow started melting. The yield per hectare would be expected to reduce 10.9% compared to last year' all over China due to the ice-snow disaster. But due to the total planting area of winter rape increased 17.0%, and together with unaffected areas in Sichuan, Chongqin, Yellow and Huaihe River areas, total yield could increase 4.3% compare to last year. Measurements should be used to prevent freeze injury after this experience of extreme low temperature,we may be better prepared for such condition in the future if we can adapt our breeding program, popularize freeze resistance varieties, enhance variety management, sow late in the season rationalize the managemont such as fertilizing,inter-tilling cutting old leaf and injured peduncle." @default.
- W2381427382 created "2016-06-24" @default.
- W2381427382 creator A5008575896 @default.
- W2381427382 date "2008-01-01" @default.
- W2381427382 modified "2023-09-24" @default.
- W2381427382 title "Investigation on 2008'low temperature and freeze injure on winter rape along Yangtze River" @default.
- W2381427382 hasPublicationYear "2008" @default.
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