Effect Of Compound Fertilizer Of Chinese Herbal Extracts On Soil Characteristics Of Continuous Cropping Tobacco And Flue-cured Tobacco Yield And Quality

In order to effectively solve the problem of continuous cropping obstacles caused by long-term continuous cropping in Jiangxi Fuzhou tobacco area,optimize the continuous cropping soil environment,and improve the yield and quality of tobacco leaves,this study used "Yunyan 87" as the test material and conducted field experiments to study the effect of compound fertilizers of traditional Chinese medicine extracts on continuous cropping flue-cured tobacco.And the influence of tobacco-growing soil,the test results are as follows:1.The effect of Chinese medicine compound soil-improving fertilizer on the yield and quality of flue-cured tobacco and the tobacco-growing soil Using the field test method,apply the Chinese medicine compound soil improvement fertilizer together with the base fertilizer into the soil before transplanting.According to the different application amount of the Chinese medicine compound soil improvement fertilizer,a total of 4 treatments are set up: T1(conventional fertilizer),T2(Conventional chemical fertilizer+20kg/mu Chinese medicine compound soil improvement fertilizer),T3(conventional chemical fertilizer+25kg/mu Chinese medicine compound soil improvement fertilizer),T4(conventional chemical fertilizer+30kg/mu Chinese medicine compound soil improvement fertilizer).in the study of the impact on the tobacco-growing soil,it was found that the traditional Chinese medicine Compounding soil improvement fertilizers can adjust soil p H value,effectively increase the content of nitrogen,phosphorus,potassium and soil organic matter and soil urease,invertase,acid phosphatase and catalase activities,indicating that compared with conventional fertilizers,the application of traditional Chinese medicine compound soil Improved fertilizers can increase soil enzyme activity,improve soil environment,and improve soil fertility,The results showed that adding Chinese medicine compound soil improvement fertilizer can increase the plant height and leaf area of flue-cured tobacco,and it also has a certain promotion effect on chlorophyll and photosynthesis index.It can improve the ability of flue-cured tobacco to resist brown spot disease and aphids to a certain extent.On the other hand,the treatment of adding Chinese medicine compound soil improvement fertilizer is better than T1 control,and can reduce the nicotine content of tobacco leaves to reach the range of high-quality tobacco.In the coordination of chemical components,increase the application of Chinese medicine compound soil improvement fertilizer The effect is better than the single application of conventional fertilizer.T4(conventional chemical fertilizer+ 30kg/mu Chinese medicine compound soil improvement fertilizer)has the best effect.Chinese medicine compound soil improvement fertilizer has a certain effect on the total amount of neutral aroma substances in the upper and middle leaves of flue-cured tobacco The promotion effect of T4 treatment was the best.Compared with the control,it increased by 33.79% and 31.57%respectively.It can increase the content of trace elements in tobacco leaves to reach the appropriate range.2.The effect of traditional Chinese medicine compound on the growth,yield and quality of flue-cured tobacco.Using the field test method,on the basis of conventional pesticides to prevent and control pests and diseases,a total of 5 treatments are set up: T1(control,conventional pesticide control),T2,T3,T4,T5(based on T1).Spray on 15,30 days,15,30,45 days,15,30,45,60 days,15,30,45,60,and 75 days after planting,respectively.The results showed that the various treatments sprayed with the Chinese medicine compound had a certain promotion effect on agronomic traits and photosynthesis indicators,among which T5 treatment had the best effect;it had obvious effects on the prevention and treatment of brown spot disease,among which T5 The treatment has the lowest disease index and the best control effect.It can also reduce the aphid rate and aphid population index of flue-cured tobacco;the yields and output values of each treatment sprayed with the Chinese medicine compound are higher than the control,and the T5 is the highest,which is 41.46% and 46.62% higher than the control;the chemical composition of each treatment of spraying the Chinese medicine compound is not significantly different from the control;the Chinese medicine compound can increase the total amount of neutral aroma substances in the upper and middle leaves of flue-cured tobacco,which increases by13.39% and 20.27% respectively compared with the control.At the same time,the content of trace elements in tobacco leaves is more coordinated,and the effect of T5 is the most obvious.