Field experiments were conducted to study the effects of biochar on the tobacco-planting soil improvement and economic characters of flue-cured tobacco.The results showed that soil available nutrient,soil aggregation,and economic characters according to the yield and output value of flue-cured tobacco changed to different extent under the condition.The 0.25-2 mm aggregate size was dominant among four aggregate sizes and contained the highest organic C and total N contents.The application of biochar resulted in the formation and accumulation of 0.25-2 mm aggregates which improved soil structure,and there were significant effects in the treatments of T4 and T5.Meanwhile,the application of biochar with chemical fertilizers was favorable to enhance soil available nutrient contents,which the most significant treatment was T5.Compared with the treatment T2,soil available nitrogen and potassium were increased by 16.0％ and 15.2％.According to the yield and output value,the most significant treatment was T5.Compared with the treatment T2,the soil available nitrogen and potassium were increased by 497.9 kg/hm2and 9509 yuan/hm2.In short,the application of biochar could improve soil structure,enhance soil available nutrient and economic characters according to the yield and output value of flue-cured tobacco.The optimum application rate of biochar was 2250 kg/hm2.%通过田间试验研究生物质炭对土壤改良及烤烟经济性状的影响.结果表明,施用生物质炭使植烟土壤养分有效性、团聚性和烤烟产量等经济性状均发生了不同程度的变化.0.25～2 mm团聚体是土壤中占绝对优势的粒级,对土壤有机质及全氮的贡献最大,施用生物质炭有利于其形成和积累以及良好土壤结构的形成,其中,常规施肥+生物质炭1500kg/hm2(T4)和常规施肥+生物质炭2250 kg/hm2(T5)处理效果显著.同时,生物质炭配施化肥还有利于土壤养分有效性的提高,以T5处理效果最为显著,碱解氮和速效钾含量分别比常规施肥(T2)处理提高16.0％和15.2％.产量和产质上T5处理最高,与T2相比,分别增加497.9 kg/hm2和9509元/hm2.总之,施用生物质炭可改善植烟土壤结构,提高土壤养分有效性以及烤烟产量和产值等经济性状,适宜的生物质炭用量为2250 kg/hm2.
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机译：绿肥混作对植烟土壤理化性状和烤烟经济性状的影响Effects of Green Manure Mixed Cropping Patterns on Physical and Chemical Properties of Soil and Economic Characters of Flue-cured Tobacco
