摘要
[目的]探索连作烟地土壤障碍因子的发生机理。[方法]用方差分析法研究不同连作年限下贵州植烟土壤微生物群落和土壤理化性质的变化趋势。[结果]连作n<10年和n≥10年烟地的细菌数量有极显著差异;连作5<n<10年和n≥10年烟地真菌数量有显著差异;放线菌数量没有差异。连作n≤5年和连作n≥10年烟地青枯病病原菌数量有显著差异;而黑胫病病原菌数量变化没有差异。连作n<10年和n≥10年的土壤全氮、全磷、有机质含量和pH值变化有极显著差异;全钾含量变化没有差异,但其有效氮、有效磷含量差异不显著,而有效钾含量有显著差异。[结论]随着烟地连作年限增强,细菌数量下降,真菌数量增加,放线菌数量略有增加;青枯病病原菌数量下降;土壤全氮、全磷、有机质含量在逐渐增加。
[Objective] The study aimed to research the occurrence mechanism of soil obstacle factors in continuous cropping tobacco land.[Method] The microbiological community and physico-chemical properties in tobacco-growing soils under different continuous cropping years were studied by variance analysis method.[Result] The significant differences on bacteria quantity were found in tobacco-growing land between continuous cropping years of n〈10 and n≥10,that on fungus quantity were found between continuous cropping years of 5
〈 n 〈 10 and n≥ 10 and no significant differences on actinomycetes quantity were found. The sigmificant differences on number of Ralstonia solanacearum pathogens were found in tobacco-growing land between continuous cropping years of n 〈 10 andn〉~ 10 and no significant differences on tmmber of Phytophthora parasltlca var nlcotlaaa pathogens. Between continuous cropping years of n 〈 10 and n ≥10, the contents of total N, total P and organic matters and the value of pH in soil had extremely significant differences, no statistical differences were found on the content of total K, the contents of available N and P in soil had not signifmant diffences and the contents of available K exhibited significant differences. [ Conclusion] Mong with the increase of continuous cropping years, the bacteria quantity was decreased, fungus quantity was increased, actinomycetes was slightly increased, R. solanaceanan pathogen quantity was decreased, and the contents of total N, total P, and organic matters were increased gradually.
出处
《安徽农业科学》
CAS
北大核心
2008年第12期5033-5034,5052,共3页
Journal of Anhui Agricultural Sciences
基金
贵州省烟草专卖局和国家烟草专卖局项目(11020-0401011)
关键词
烤烟
连作
土壤微生物
土壤理化性质
青枯病
Flue-cured tobacco
Continuous cropping
Soil microb
Soil physico-chemical properties
Ralstonia solanacearum
作者简介
王茂胜（1978-），男，山西朔州人，助理研究员，从事烟草微生物研究。
