Effects of Drought-resistant Moist-locking Measures on Growth and Quality of Flue-cured Tobacco

In terms of actual situation of drought in arid regions of Pianjiao in Lijiang Yongsheng,looking for drought technical measures.By adopting randomized block design,using treatment of no mulching,applying Baode microorganism soil conditioner,full coverage with straw stalk every other ridging,plasticmulched and straw stalk mulching in inter row,plastic-mulched and straw stalk mulching on whole surface, Yunyan 97 as material,to study effects of different mulching methods on physiological property,yield and quality of flue-cured tobacco.The results showed:(1) mulching treatment promoted grow of tobacco plant, field growth period of each treatments were 2,4,4,5 days in ahead respectively.(2) Plastic-mulched had effects of increasing soil temperature on tobacco plant in whole growth period,while straw stalk mulching could reduce soil temperature,so accumulated temperature of plastic-mulched and straw stalk mulching on whole surface was higher 2.38～9.25℃than full coverage with straw stalk every other ridging;besides the treatment of applying BaoDe microorganism soil conditioner,soil moisture content of other treatments increased respectively 2.44%,2.99%and 4.58%;effects which mulching promoted chlorophyll of tobacco plant to compound were more obvious in prophase.(3) Yield of each mulching treatments were respectively increased 375,675,750,900 kg/hm,production value were respectively increased 7 703.2,13 252.5, 13 978.5,17 386.5 yuan/hm,average price were respectively increased 1.68,2.37,2.24,2.77 yuan/ kg,proportion of high class leaf were respectively increased by 6%,4.8%,10.2%,16.8%,proportion of high and middle class leaf were respectively increased 6.7%,7.3%,14.5%,15.8%.(4) Applying Baode microorganism soil conditioner made total sugar and reducing sugar content decrease 4.77%and 4.7%,other treatments made total nitrogen content respectively increase 0.14%,0.02%,0.23%, 0.42%,potassium content respectively increase 0.05%,0.09%and 0.09%,chemical composition of tobacco leaf was more coordinate,plastic-mulched and straw stalk mulching on whole surface also had the highest economic benefits,was the best treatment.