Effect of Different Sowing Time on Tobacco Leaf's Yield and Quality in Floating Nursery of Flue-cured Tobacco

A comparative test of different sowing time was set up to explore its impact on tobacco yield and quality of Yunyan 87.The results showed that under the same conditions,different sowing time had little effect on agronomic traits and growth period,but it had greater impact on the quality and the yield of tobacco seedings.In Leiyang tobacco growing areas,it has the most economic benefits when the sowing time was on the December 25th or 28th,Too early or too late would effect the output value and product value.