施用菜籽粕对烤烟根际微生物数量及种群的影响

为了解菜籽粕能够提高烤烟品质的效用机理，采用盆栽方法研究菜籽粕对烤烟根际微生物群落结构的影响。结果表明，施用腐熟和未腐熟的菜籽对烤烟根际细菌、放线菌及真菌均有促进作用；对自生固氮菌、磷细菌和钾细菌的数量也有一定影响，但与施用菜籽粕对烤烟根际细菌总体数量的影响不完全一致；未腐熟菜籽粕对烤烟根际细菌具有一定的选择作用，从该处理烤烟根际分离到的有益细菌主要为芽孢杆菌属（Bacillus）和假单胞菌属（Pseudomonas）。另外，腐熟菜籽粕对烤烟根际有益细菌种群多样性有促进作用，而未腐熟菜籽粕则不同。

Effect of Fertilization with Rapeseed Meal on Rhizosphere Microorganism Quantity and Community of Flue-cured Tobacco

Pot experiment was conducted to study rhizosphere microorganism of flue-cured tobacco, quality of flue-cured tobacco when fertilizing with the effect of rapeseed meal on community structure of in order to understanding the mechanism of promoting rapeseed meal. Results showed that treats with rapeseed meal （both rotted and unrotted） promoted the quantities of bacteria, actinomycetes and fungi. And the same treats impacted the quantities of azotobacter, phosphorus bacteria and potassium bacteria in different extent respectively, which does not consistent with the effect on the quantities of bacteria. Unrotted rapeseed meal exhibits selectivity to rihzobactera of flue-cured tobacco, in which the mainly two genera of bacteria isolated were Bacillus and Pseudomonas. Besides, the treat with rotted rapeseed meal improve the diversity characteristics of azotobacter and phosphorus bacteria, while unrotted rapeseed meal not.