华南农业大学学报2012，Vol.33Issue(4)：480-487,8.
韭菜根系浸提液对香蕉枯萎病和土壤微生物生态的影响
Effects of Allium tuberosum Root Extracts on Banana Fusarium Wilt and Soil Microbial Ecology
摘要
Abstract
The inhibition effects and the disease-control efficiency of Allium tuberosum root extracts on Foc4 ( Fusarium oxysopoyum f. sp. cubence race 4) , and root extracts effects on soil microbial ecology were studied by bacteriostatic experiment ( mycelia growth rate method, spore germination method and pot trial). The results of bacteriostatic test indicated that A. tuberosum root extracts had significantly inhibition action on mycelia growth and conidium germination of Foc4, showing concentration effects on Foc4. In addition, the aberration of the morphology of mycelia and conidium of Foc4, which were impacted by A. tuberosum root extracts, was found by microscopic observation. The results of pot trial showed that the occurrence of banana fusarium wilt decreased significandy by A. tuberosum root extracts, and disease-control efficiency increased with the increase of root extracts concentration. When the root extracts concentration reached 160 mg · mL-1, the disease-control efficiency was up to 53. 66%. A. tuberosum root extracts could affect the numbers of Foc4 and the main microorgnanisms in the soil, which was presented as the numbers of Foc4, fungi and actinomyces in the soil were reduced, while the numbers of bacteria in the soil increased evidently. The Biolog analyses on the 40th planting days showed that A. tuberosum root extracts could noticeably increase carbon source utility by microbes and soil microbial community diversity, richness, uniformity, which manifested that A. tuberosum root extracts could adjust soil microbial community structure, enhance soil microbial ecological system stability and inhibition of disease, thus reducing the occurence of soil born disease.关键词
韭菜根系浸提液/香蕉枯萎病/防病效果/土壤微生物生态Key words
Allium tuberosum root extracts/banana fusarium wilt/disease-control efficiency/soil micro-bial ecology分类
农业科技引用本文复制引用
杨江舟,张静,胡伟,任爽,陆尚沛,李华兴..韭菜根系浸提液对香蕉枯萎病和土壤微生物生态的影响[J].华南农业大学学报,2012,33(4):480-487,8.基金项目
国家自然科学基金(40971155) （40971155）
广东省-教育部产学研结合项目(2009B090300330) （2009B090300330）
