NIE Tianhong, HAN Xuebo, WANG Hailong, et al. Effect of Different Biochars on Soil Conservation, Growth and Quality of the Flue-cured Tobacco[J]. 2018, 32(6): 346-351.
DOI:
NIE Tianhong, HAN Xuebo, WANG Hailong, et al. Effect of Different Biochars on Soil Conservation, Growth and Quality of the Flue-cured Tobacco[J]. 2018, 32(6): 346-351. DOI: 10.13870/j.cnki.stbcxb.2018.06.050.
Effect of Different Biochars on Soil Conservation, Growth and Quality of the Flue-cured Tobacco
A pot experiment was conducted to evaluate the effects of different biochars derived from coconut shell
bamboo sawdust
dead pig and tobacco stalk respectively (at 3% application rate) on the physicochemical properties of tobacco-planting soil
agronomic characteristics of tobacco plant and chemical composition of the flue-cured tobacco leaves. The results showed that the electrical conductivity
contents of available nutrients and organic carbon and enzyme activities of the tobacco-planting soil were influenced significantly by the application of different biochars. The highest content of soil organic carbon was observed in the bamboo biochar treatment
which increased by 146.37% compared to the control. Moreover
the application of pig biochar significantly (p<0.05) increased the electrical conductivity
available phosphorus and potassium
and promoted the activities of catalase and urease in tobacco-planting soil. The application of biochars had a slight influence on the agronomic traits of tobacco plant. The stem girth of tobacco plant in pig biochar treatment increased by 0.78 cm compared to the control. The biomass of tobacco plant significantly (p<0.05) increased
as the dry weight of tobacco leaves increased by 58.07% and 47.01% in the pig biochar and tobacco stalk biochar treatments
respectively
compared to the control. In addition
after the application of bamboo biochar
pig biochar and tobacco stalk biochar
the contents of nicotine
nitrogen
potassium and reducing sugar in flue-cured tobacco leaves all conformed to the standard of high quality tobacco. The application of pig biochar also significantly (p<0.05) increased the content of chloride in flue-cured tobacco leaves
and adjusted the sugar/nicotine and nitrogen/nicotine ratios to meet the standard of high quality tobacco. In conclusion
pig and tobacco stalk biochars were more effective than others in improving tobacco-planting soil properties and nutrient status
as well as promoting tobacco biomass and quality in the present study.
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