Water-saving Efficacy of Different Mulching Methods and Their Influence on Tobacco Yield and Quality

Field experiment was conducted to investigate the water-saving efficacy of membrane multhing and straw mulching and their influence on tobacco growth,yield and quality.The results showed that both mulching methods could promot the growth and development of tobacco plant,of which the membrane mulching was more advantegous at early plant growth stage and the straw mulching showed better effect after fast growing stage.Both muching methods increased soil water contents of different layers during the drought season by decreasing water evaporation,but membrane mulching showed better water-saving effect at the early plant growth stage.Mulching cultivation could decrease the frequency and drgree of tobacco mosaic,so increased the yield and upper grade proportion of tobacco,with straw mulching being the best.