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《Fujian Journal of Agricultural Sciences》 2008-03
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High-yield conditions and climatic/ecological adaptability of hybrid-rice Ⅱ you131

YOU Zhi-ming1,3,JIANG Zhao-wei2,CHENG Xue-hua1,LI Xiao-ping2,HUANG Jing-can1(1.Fujian Minfeng Scientific Seed Company Limited,Fuzhou,Fujian 350003,China;2.Rice Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou,Fujian 350019,China;3.Tea Research Institute,Fujian Academy of Agricultural Sciences,Fu'an,Fujian 355000,China)  
To determine the conditions for high-yield and climatic/ecological adaptability of hybrid-rice Ⅱyou131,in preparation for large scale promotion,field stations were established at Dehua and Youxi counties in Fujian.Conditions studied included interval sowing in a same location,sowing at the same time at different locations,nitrogen application rate,photoperiod control,etc.The observation and data collection included rice growing process,tiller dynamic,rice yield,yield components and meteorological factors,in order for statistical analysis.The results indicated that the contribution rate of total spikelets per m2 to yield variation in the demonstration field areas of Ⅱyou131 was the highest(93.7%),and the contribution rate of spikelets per spike to variation of total spikelets per m2 was the highest(88.8%).Ⅱyou131 had strong stooling and its critical period of effective tiller was 21.1±1.6 d after transplant.The key to achieve high yield for Ⅱyou131 was adequate spike by variety characteristics of strong stooling and total spikelets per m2 by cultivating large spike.Ⅱyou131 has weak thermonasty,medium or slightly low photosensitivity and long basic vegetative period.Length of growing period directly relates to photo-thermal characteristics and ecology.Based on the temporal and spatial distribution patterns of thermal energy in Fujian,as well as the growing characteristics of Ⅱyou131 under different temperature and sunlight,appropriate ripe cycle and sowing time for Ⅱyou131 were recommended for areas in Fujian with different latitude and altitude.
【Fund】: 福建省科技重大专项(2007N1005);; 国家科技支撑计划子课题(2006BAD02A13-3-6)
【CateGory Index】: S511.21
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