Effects of Nitrogen Application Rate on Growth, Yield and Quality of Flue-cured Tobacco in South of Jiangxi Province
In order to explore the effects of different nitrogen application rates on the growth and development of flue-cured tobacco in south of Jiangxi Province,as well as the yield and quality of tobacco leaves,and to clarify the appropriate nitrogen application rate in tobacco area.Flue-cured tobacco variety Yunyan 87 was used as the material, five nitrogen fertilizer application experiments with different gradients ( 120. 0, 127.5,135.0,142.5 and 150.0 kg/hm2) were conducted.A randomized block design was used to study the effects of different nitrogen applica-tion rates on the agronomic traits, yield, output value, and quality of flue-cured tobacco in the southern Jiangxi tobacco region. The results showed that within a certain range of nitrogen application,with the increase of nitrogen application rate, the stem circumference,effective leaf number,yield,average price,output value,and proportion of middle to upper grade tobacco of flue-cured tobacco increased.When the pure ni-trogen application rate exceeded 142. 5 kg/hm2 , the yield and quality of tobacco leaves decreased. At a nitrogen application rate of 142.5 kg/hm2 ,tobacco plants exhibited excellent growth vigor,agronomic traits,highest yield,and relatively coordinated internal chemical com-ponents.
Nitrogen application rateFlue-cured tobaccoProduction qualityAgronomic traitsSouth of Jiangxi Province
万方数据
维普
