Effects of Plastic Mulching Film on Yield and Quality of Flue-cured Tobacco in High Altitude Area

Effect of non mulching,mulching for 35 days,and mulching for whole growing period on yield and quality of flue-cured tobacco was studied to find out the optimal mulching method of plastic mulching film in Weining tobacco growing areas.The results showed that both the treatments of mulching for 35 days and mulching for whole growing period,promoted the germination and growth,and improved the yield and output value,especially mulching for whole growing period was optimal,yield and output value increased 20.9% and 48.6% compared with non mulching;However,mulching for 35 days and mulching in whole growing period resulted to higher nicotine content and lower potassium content,both treatments negatively affected the quality of flue-cured tobacco.