Effects of Applied Different Forms of N Fertilizer on Quality of Flue-cured Tobacco

A field plot and pot experiments on sandy loam of middle fertility soil were conducted from 1993 to 1995.The different forms of N fertilizer effect on agronomic, physiological and biochemical characteristics, yield and quality of flue-cured tobacco were observed.The results showed that the best forms of N fertilizer is 50% NH₄⁺-N +50% NO₃^--N under the soil and weather condition in Yunnan province.