Effects of Adding Organic Fertilizer on Flue-cured Tobacco and Soil Characteristics Under the Condition of Different Embedded Green Manures
[Objective]The effects of adding organic fertilizer on the flue-cured tobacco and soil characteristics under the condition of different embedded green manure were explored,so as to provide theoretical basis for the optimal application method of green manure embedding in tobacco fields.[Method]Using Yunyan 87 as the experimental material,a split plot design was conducted in a field experiment.The main treatment was green manure embedding(barley,rapeseed and ryegrass),and the secondary treatment was fertilizer types(nitrohumic acid,earthworm manure and bio-organic fertilizer),then the effects of different treatment combinations on flue-cured tobacco and soil characteristics were analyzed.[Result]Under the main treatment,the height of plant under nitrohumic acid treatment 30 days after transplantation was significantly higher than that of bio-organic fertilizer treatment,and the bacteria in soil was significantly higher than that of earthworm manure and bio-organic fertilizer treatment.The available phosphorus under bio-organic fertilizer treatment was obviously higher than that of earthworm treatment with the growth rate of 7.3%,20.1%and 11.1%,respectively.Under the barley and rapeseed embedding treatment,the total dry matter yield treated with nitrohumic acid was significantly higher than that of earthworm manure treatment with the growth rate of 10.3%and 8.5%.Under the barley,rapeseed and ryegrass embedding treatment,the yield and output value of flue-cured tobacco treated with nitrohumic acid was obviously higher than that of earthworm manure and bio-organic fertilizer treatment.[Conclusion]On the basis of comprehensively considering the production and economic traits of tobacco leaves,applying nitrohumic acid,earthworm manure and biological fertilizer under different treatments of green manure embedding can improve the soil nutrients of tobacco fields,promote the growth and development of flue-cured tobacco and improve the tobacco yield and output value.The best combination is adding nitro humic acid under barley embedding treatment,which has the highest yield(2.48 t/hm2)and output value(65667 Yuan/hm2),and is suggested to be applied in tobacco-planting area of southern Henan.
green manure embeddingorganic fertilizernitrohumic acidflue-cured tobaccoyieldoutput valuesoil characteristics
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