Effect Of Different Fertilization On Yield And Quality Of Flue-Cured Tobacco

Using 3414 program designed by the United Nations Food and AgricultureOrganization (FAO), the field experiment was conducted in LeiYang city on the basisof soil test in order to further studying Effects of different levels of fertilization onyield and quality of Flue-Cured Tobacco. The main results were indicated asfollowing:1,Different levels of fertilization affects the agronomic characteristics of Flue-CuredTobacco. Levels of nitrogen from No to N₂,the agronomic characters were all increasewith more nitrogen supply. However N₃ level nitrogen supply cause that the tobaccogrew so fast and induced the adiposity.the agronomic characters were also increasedwith potassium increase .phosphorus is basically the same as potassium except thatstem length of P₂ is higher than P₃. Sequence of the contribution of three elementsto plant is N＞P＞K. so the nitrogen, potassium and phosphorus matches couldcoordinate the growth of the over-ground and the underground.2,Different levels of fertilization also affects yield output and production value ofFlue-Cured Tobacco. Without nitrogen, phosphorus and potassium circumstances,Differences of yield between fertilizing organic fertilizer and no fertilizer achievesignificantly, up to20.6%. In a certain range of fertilization, yield, production valueand net income of fields per 667m² were all increase along with quantity offertilization, however exceeding over the range,the net income had decreased. In thisexperimental conditions the effect of nitrogen on yield of Flue-Cured is more largelythan effect of potassium and phosphorus. The going up of the yield is 11.9 kilogramper 667m² by increasing one more unit nitrogen, The going up of the yield is 9.0kilogram per 667m² by increasing one more unit phosphorus, and The going up of theyield is3.5 kilogram per 667m² by increasing one more unit potassium3,Different levels of fertilization affects the content of chemical components inFlue-Cured Tobacco as well. On the condition of different levels of nitrogen, thedifference of content of nicotine and total nitrogen between N₁ and N₂ is notsignificant in the period preceding growth which is significant with other treatment. But in the later of growth, Difference of each treatment is significant.the difference ofcontent of K between N₂ and N₃ is not significant .Difference of content total sugarand reducing sugar of all treatments is significant during the period of whole growth.On the condition of different levels of phosphorus, difference of content of nicotineand total nitrogen between P₁ and P₂ is not significant in the period of whole growth.Difference of content K between P₁ and P₂ is not significant and difference of contentof total sugar and reducing sugar between P₀and P₃ is not significant. On the conditionof different levels of potassium, difference of content nicotine between K₁ and K₂ isnot significant in the period preceding growth, but the difference is significant in thelater of growth, difference of content total nicotine between K₁ and K₂ is significantin the period preceding growth, but the difference is not significant in the later ofgrowth. Content of potassium total sugar and reducing sugar is increasing along withamount of potassium fertilization and difference of content of potassium total sugarand reducing sugar of each treatment is significant.In conclusion, the best nitrogen,potassium and phosphorus applied amount was9.9kg/667m²,22.0kg/667m² and 10.7kg667m² to get high production and highquality in the Flue-Cured Tobacco.