Effects Of Different Ratio Of Water Soluble Fertilizers On Yield And Quality Of Flue Cured Tobacco Under Drip Irrigation

High quality tobacco is a necessary condition to meet the demand of raw materials in cigarette industry.To get high quality tobacco suitable for production need certain fertilization standard.Wei Fang tobacco growing-area has popularized drip irrigation technology since 2014,developed the effect of different ratio of water soluble fertilizer on tabacco output and quality based on the development of water and fertilizer integration technology,which has great significance in improving tobacco production and fertilizer availability to improve tobacco leaves quality.This test sets up 8 treatments,which include seven different ratio of water soluble fertilizer and one conventional fertilizer as control.The result is as below:(1)From economical character,with the same ratio of fertilizer at each stage,high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage and nitrate fertilizer at each stge has better performance on plant height,leaf area and effective leaf number.From dry matter accumulation,high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer the late stage and nitrate fertilizer at each stage has better performance on the dry matter accumulation of root,stem and leaf,which has higher dry matter accumulation(2)From the effect of each treatment on the nutrient accumulation of root,leaf,stem and the whole plant,different fertilizer ratio has some influence on tobacco’s nutrient,accumulation.For high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage and nitrate fertilizer at each stge,leaf nitrogen content increases well at the early period and has moderate increase at the late period,which is good to harvest and bake tobacco.At the same time,the leaf with these two treatments has high potassium accumulation.(3)From the effect of different fertilizer ratio on tobacco photosynthetic characteristics,high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage and nitrate fertilizer at each stge has better photosynthetic rate during vigorous growing period with exuberant metabolism,good for matter accumulation.Compared with no fertilizing treatment,this treatment has higher photosynthetic pigment content in the early growth stage,and it can be degraded in the late stage,which is a signal of tabacco matured.(4)From the output and quality,high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage and nitrate fertilizer at each stge has better quality,has good internal quality coordination,and high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage has better output and economic benefits.In summary,high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage showes best result.Besides,from the cost of fertilizer,although high nitrogen fertilizer at the early stage and high hyperkalemia fertilizer at the late stage showes good result,the fertilizer cost is high.Fertilizing potassium nitrate at each stge also showes good in the field with good internal quality,and also the cost of gertilizer is much lower than the cost of water-soluble fertilizer.Therefore,from the point of view of generalization,the application of potassium nitrate at each stage has better popularization and application value.