烟草科技2015，Vol.48Issue(11)：16-21,6.DOI:10.16135/j.issn1002-0861.20151104
喀斯特山区不同种植方式下烟田土壤微生物特征分析
Characteristic of Soil Microorganism in Karst Mountain Areas Under Organic and Conventional Cultural Practices
摘要
Abstract
To investigate the changes of soil microbial characteristics in Karst mountain areas caused by the transformation from conventional cultivation into organic cultivation, an experiment was carried out in tobacco fields on which organic cultivation had been conducted for three consecutive years in Jinsha County, Guizhou Province by taking conventional cultivation as the control. The basic soil properties, bacterial and fungal community structure and key influencing factors were studied. The results showed that: comparing with conventional cultivation, the contents of soil organic matter and microbial biomass carbon significantly increased, the contents of soil nutrients (total nitrogen, total potassium, available phosphorus,available potassium, etc) significantly decreased (p<0.05), and the amount of beneficial microorganism groups increased as a result of organic cultivation. The richness and diversity of bacteria were higher than those of fungi were common to both cultural practices. The diversities and microbial communities at phylum level were not obviously different between conventional and organic cultural practices. Bacterial communities dominated by Proteobacteria, Actinobacteria and Acidobacteria(accounted for 54.2%-62.0%), and fungal communities dominated by Ascomycota (accounted for 74.4%). The microbial communities in Karst mountain areas were mainly influenced by the organic matter, nutrient and bulk density in soil.关键词
喀斯特山区/烤烟/有机种植/常规种植/土壤微生物/细菌/真菌Key words
Karst mountain area/Flue-cured tobacco/Organic cultivation/Conventional cultivation/Soil microorganism/Bacterium/Fungus分类
农业科技引用本文复制引用
黄化刚,肖谋良,梁士楚,张龙,肖和友,代园凤,申燕,苏以荣,陈香碧..喀斯特山区不同种植方式下烟田土壤微生物特征分析[J].烟草科技,2015,48(11):16-21,6.基金项目
贵州省烟草公司毕节市公司科技项目"毕节市有机生产方式下烟田土壤生态特征研究"(BJYC-201301) （BJYC-201301）
中国科学院西部之光人才培养计划西部博士资助项目"喀斯特典型农田土壤木质素降解特征与微生物驱动机制"(Y423035010). （Y423035010）
