不同作物茬口微生物数量的变化对烟草品质的影响

Effects of Microorganism Numbers from Different Crop Stubbles on Tobacco Quality

对不同作物茬口烟草的不同生长期根际土壤微生物数量进行分析,研究其对烟草品质的影响。结果表明,不同作物茬口处理的烟草根际土壤中细菌、放线菌、真菌的数量均在烟叶旺长期和成熟期有大幅度升高,而后下降。白菜茬、红薯茬和芝麻茬为细菌性土壤,而玉米茬偏向于真菌性土壤。真菌性土壤的玉米茬处理的烟叶品质相对较差,细菌性土壤的红薯茬和芝麻茬处理的烟叶品质相对较好,细菌性土壤有利于栽培出良好品质的烟草。

The soil microorganism numbers from differernt crop stubbles were analyzed during different growth periods of tobacco,and their effects on tobacco quality were studied.The results showed that the numbers of bacteria,actinomycetes,fungi increased largely in flourish and mature period of tobacco,then decreased.Soil of cabbage stubble,sweet potato stubble and sesame stubble belongs to the bacterial soil and the soil of maize stubble belongs to the fungal soil.Tobacco quality from the fungal soil treated by maize stubble was not good.At the same time,tobacco quality from the bacterial soil treated by sweet potato stubble and sesame stubble was better,so the bacterial soil is conducive to improve the quality of tobacco.