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《Southwest China Journal of Agricultural Sciences》 2012-06
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Study on Precise and Quantitative Cultivation of Ratooning Rice

LI Gui-yong1,NING Bo1,LIU Yu-wen2,HU Hui3,WANG An-dong2,LI Jia-hua3,XIA Qiong-mei1,DENG An-feng1,YANG Cong-dang1(1.Food Crops Research Institute,Yunnan Academy of Agricultural Sciences,Yunnan Kunming 650205,China;2.Lincang Agricultural Technology Extension Center,Yunnan Lincang 677000,China;3.Shuangjiang Agricultural Technology Extension Center,Yunnan Shuangjiang 677300,China)  
In 2010 and 2011,the high yields were created by the first cropping rice precise and quantitative cultivation in Lincang city of Yunnan province,and the sowing date,the amount and date of N application for bud development,the rudimental stubble height,different cultivation techniques of rationing rice high-yielding Yiyou 673 with strong rationing ability were analyzed,and also the ratooning rice precise and quantitative cultivation was explored.The results showed that the average yields were increased 3.21 t/hm2 by the first cropping rice and ratooning rice precise and quantitative cultivation with more 22.22 % than local high cultivation.The yields of rationing rice were increased 2.16 t/hm2,and yield increase rate was more 132.90 %.The seed of the first cropping rice could usually be sowed before February 20.The seedlings could usually be transplanted before mid-April.The first cropping rice could usually be harvested before mid-August,and the rationing rice could be harvested before mid-October.The yield correlation between the first cropping rice and ratooning rice was extremely significant.In order to improve the yield of rationing rice,the high yield of the first cropping rice must be ensured.The recommended total N fertilizer 195 kg/hm2 in the technology of ratooning rice precise and quantitative cultivation in Yunnan should be averagely used in the field at twice.The first was 15 to 20 days after full heading of the first cropping rice and the second was 2 to 3 days after the first cropping harvest.The height of rudimental stubble was 30 cm.
【Fund】: 农业部公益行业(农业)科研专项(200903002);; 云南省科技创新强省计划(2010AD008);; 云南省现代农业水稻产业技术体系;; 云南省创新人才培养计划(2011CI058)
【CateGory Index】: S511
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