Overwintering safe storage methods and region division of seed-stem of cassava in China
[Objective]Regional climate characteristics in China cassava planting areas and cassava overwintering storage methods were studied to provide technical guidance for sustainable development of cassava industry in China.[Method] Methods of in vivo field preservation,in vitro piled up in the open air,underground storage,greenhouse stacking,and so on,were used for seed-stem storage for winter in Hepu,Nanning,Laibin of Guangxi,Hunan,Zhcjiang Province,and so on.The number of survival buds was checked up after the beginning of spring,and the bud survival rate under different storage methods was calculated.[Result]The bud survival rate of seed-stem piled up in the open air could reach more than 90％ in Hepu region,and seed-stem of shallow burial in the open air attained the highest survival rate (94.38％).The bud survival rate under the greenhouse stacking in Nanning was the highest (94.98％).In Laibin,the bud survival rate of greenhouse storage reached over 89.60％,in particular,the bud survival rate under underground horizontal placement covered with sugarcane leaves was the highest (98.79％).In Jiangyong of Hunan and Hangzhou of Zhejiang,the bud survival rate was relatively higher under overwintering equipment conservation methods.[Conclusion]Chinese cassava stem overwintering storage,south of 21.6°N region where is frost-free area(south of Maoming in Guangdong,Hepu in Guangxi,Jinghong in Yunnan),the methods of air storage shallowly buried and air storage covered by film could be used.Region of light to heavy frost edge area from 21.6°N to 23.8°N (south of Qingyuan in Guangdong,Laibin in Guangxi,Lincang in Yunnan),the methods of plastic shed,air storage covered by film and plastic shed vertical stacked storage could be used.North of 23.8°N heavy frost and cold zone (from Qingyuan in Guangdong,Laibin in Guangxi,Lincang in Yunnan to Hunan,Jiangxi,Zhejiang and other provinces),warm caves,cellar storage,and vertical stacked storage in small arch shed and plastic greenhouse could be used.
国家科技期刊平台
NSTL
万方数据
维普
