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《Journal of Anhui Agricultural Sciences》 2009-24
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Preliminary Study on Lodging-resistance Technique with Medicament in Medium Indica Hybrid Rice

KONG Ling-juan et al (Anhui Total Station of Agricultural Technique Popularization,Hefei,Anhui 230001)  
[Objective] The study aimed to discuss the method and effect of spraying the plant growth retardant Lifengling on medium indica hybrid rice.[Method] In the muti-site test,with Fengliangyou 3,Xinliangyou 6 and Yangliangyou 6 as the tested materials,3 dosage treatments of 5% Lifengling powder were set up as 300,600 and 900 g/hm2 to spray on the medium indica hybrid rice in 10 d before the rice jointing.15% Paclobutrazol at 150 g/hm2 was used as the CK medicament and the clear water was used as the blank CK,and the lodging-resistance technique with medicament in medium indica hybrid rice was studied.[Result] Spraying 5% Lifengling could make the plant to be dwarfed obviously with the medicament effect being as long as 25-30 d,and with its dosage increasing,its dwarfing effect was more obvious and then the lodge index was reduced significantly.Spraying 5% Lifengling at 300 and 600 g/hm2 could effectively improve the development of young spike,make its spiking to be advanced by 2~4 d,increase the grains per spike and increase the yield by 3.0%-8.5%,but spraying 5% Lifengling at 900/hm2 could decreased the yield.[Conclusion] Under same condition,applying 5% Lifengling at 600/hm2 could not only had effects of dwarfing and lodging-resistance but also could improve the development of grain per spike,which showed a obvious yield-increasing effect.
【Fund】: 国家科技支撑计划(2006BAD02A06);; 安徽省科技攻关项目(08010302160)
【CateGory Index】: S511.21
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