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移栽方式对烤烟土壤根际微生物的影响
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摘要
为探索龙江特色优质烤烟的移栽方式,研究了4种移栽方式对烤烟土壤根际微生物的影响。结果表明,高茎壮苗移栽、井窖式移栽、移栽机移栽烤烟土壤根际微生物数高于常规地膜移栽,特别是高茎壮苗深栽和井窖式移栽对烤烟土壤根际微生物数量的增加幅度较大。与常规地膜移栽相比,高茎壮苗深栽烤烟土壤在不同生育期的根际细菌数量增幅达42-139%,根际放线菌增幅达27-110%,根际真菌增幅达100-300%。井窖式移栽烤烟土壤在生育期的根际细菌数量增幅达10-319%,根际放线菌增幅达8-230%,根际真菌增幅达69-230%。研究表明,高茎壮苗深栽和井窖式移栽能提高烤烟土壤根际微生物数量。
[Objective]To for explore the way suitable of transplanting tobacco in Longjiang area and study the effects of different transplanting methods on soil rhizosphere microorganisms of the flue-cured tobacco.[Method]Selection of high seedling transplanting, well cellar type transplanting, conventional plastic covering transplant, transplanter transplanting four types transplant methods.Use triphenyl tetrazolium chloride(TTC) and Microbial dilution plate culture method determination dynamic changes of root activity and soil microbial quantity in different growth stages of flue-cured tobacco after transplanting.[Result]The root activity of soil in different transplanting methods was significantly different in the whole flue cured tobacco growth period. Different transplanting methods of tobacco soil rhizosphere microorganisms are the bacteria absolute advantage, actinomycetes secondly, fungi at least.And the total number of microorganisms in different stages of treatment was not consistent, and the differences were significant.[Conclusion]Through the experiment that Longjiang area selection of high seedling transplanting and the well cellar type transplanting can improve the root activity and the number of soil microorganisms, so as to create a good micro ecological environment for the growth of flue-cured tobacco.
引文
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