Effects of Organic Carbon Fertilizer on Soil Bacterial Community Structure in Tobacco-Growing Soil and Flue-Cured Tobacco Yield and Quality
The purpose of this study was to explore the effects of organic carbon fertilizer on regulating bacterial community structure in tobacco-growing soil and yield and quality of flue-cured tobacco.The field ex-periment was conducted with four treatments,including CK(conventional fertilization),T1(conventional fer-tilization+75 kg/hm2 organic carbon fertilizer),T2(conventional fertilization+150 kg/hm2 organic carbon fer-tilizer)and T3(conventional fertilization+225 kg/hm2 organic carbon fertilizer).The soil bacterial community structure,relative abundance of dominant bacteria,correlation between relative abundance of major phyla and soil chemical properties,and yield and quality of flue-cured tobacco were investigated and analyzed.The re-sults showed that the application of organic carbon fertilizer resulted in higher values of Shannon index,Ace index and Chao1 index of bacteria in soil compared to CK;moreover,the relative abundance of Acidobacterio-ta and Chloroflexi were significantly increased.There were significant correlations between the relative abun-dance of major phyla and most soil chemical factors,among which,GAL15 had significantly positive correla-tion with available phosphorus and alkali-hydrolyzed nitrogen(P＜0.05),and extremely significantly positive correlation with available potassium,organic matter and total carbon(P＜0.01).Conversely,Bdellovibrio showed significantly negative correlation with available potassium,alkali-hydrolyzed nitrogen and organic mat-ter.The application of organic carbon fertilizer could improve the yield and quality of flue-cured tobacco,and T2 treatment had the best effect,showing the increase of total sugar,reducing sugar and potassium contents in cured tobacco by 9.89％,16.84％and 11.71％respectively,the highest overall score of sensory quality evalu-ation,and the increase ofoutput value of flue-cured tobacco,proportion of high-grade tobacco and average price by 20.01％,13.84％and 3.87％respectively compared with CK.In conclusion,the application of organ-ic carbon fertilizer could improve the soil bacterial community structure and the yield and quality of flue-cured tobacco,and the application of 150 kg/hm2 organic carbon fertilizer had the best effect.
Organic carbon fertilizerTobacco-growing soilBacterial community structureYield and quality of flue-cured tobacco
万方数据
维普
