不同比例有机无机氮配施对烤烟产量及品质的影响OA

To explore the effects of different ratios of organic-inorganic nitrogen application on tobacco yield and quality,this paper used a combination of peanut meal and amino acids as the organic nitrogen source,established four ratios of combined organic-inorganic nitrogen application in the field,namely 0∶100(CK),25∶75(TH1),35∶65(TH2),and 45∶55(TH3),and analyzed the variation charac-teristics of agronomic traits,chemical constituents,yield,and output value of flue-cured tobacco under different treatments.The effects of each treatment on the agronomic characteristics,nutrient content,chemical composition,yield,and output value of tobacco leaves were studied.The results showed that an excessively high organic-inorganic nitrogen ratio(TH3)significantly inhibited plant height,stem girth,and leaf number in the early growth stage of flue-cured tobacco.However,in the later growth stage,the application of combined organic-inorganic nitrogen had no significant effects on stem girth,leaf number,maximum leaf area,and dry weight per single leaf.The various quality evaluation indicators for middle leaves across all treatments were closest to the standard range for high-quality tobacco.The combined organic-inorganic fertilizer application demonstrated significant effects on the total potassium,water-soluble sugars,reducing sugars,schmuck value,sugar-nitrogen ratio,and sugar-nicotine ratio in the middle leaves.Regarding individual chemical indicators,the TH3 treatment resulted in middle leaves with optimal performance in reducing sugars and protein content,while the TH2 treatment showed the most favorable nicotine content.In terms of chemical component coordination,the middle leaves from the TH1 treatment had values for the schmuck value,sugar-nitrogen ratio,and sugar-nicotine ratio that were all closest to their respective suitable values.The application of organic-inorganic nitrogen significantly increased the yield and output value of tobacco,with increased 10.19%-26.53%and 12.91%-21.64%,respectively.But only TH1 and TH3 treatments significantly im proved the ratio of superior smoke.It could be seen that the combination of organic-inorganic nitrogen application was beneficial for increasing the yield and output value of tobacco.Low organic nitrogen application(TH1)and high organic nitrogen application(TH3)could achieve an increase in output value by increasing the yield of tobacco and the proportion of high-quality tobacco,while moderate organic nitrogen application(TH2)could achieve a greater increase in output value simply through a larger yield increase.Therefore,the proportion of organic-inorganic nitrogen application used in production depended on the market demand for different grades of tobacco leaves.In summary,the combined application of organic and inorganic nitrogen fertilizers contributes to a more balanced chemical composition in tobacco leaves and increases both yield and output value.Among the treatments,TH2 resultes in the greatest improvements in yield and output value.