设施栽培下香石竹不同植株状态根际土壤微生物类群变化分析

Dynamic Analysis of Carnation Rhizosphere Microbial Taxa Under Three States in Facility Cultivation

研究了云南香石竹不同生产基地的健康植株、始发病植株及枯死病植株的根际土壤微生物类群及其比值关系。结果表明:香石竹从健康向发病至枯死的变化过程,根际土壤细菌随着植株病害的加重而降低,而真菌、放线菌的变化则随着植株病害的加重而增加;根际土壤细菌与真菌比值(B/F)、细菌与放线菌比值(B/A)及好氧性细菌与厌氧性细菌的比值(Ae/An),可以作为评价香石竹栽培土壤健康状况及病害防治预报的参考指标。若B/F及B/A比值小于健康土壤数值,或Ae/An比值大于健康土壤数值,则预警该区域香石竹种植土壤存在发病的危险性。

Carnation rhizosphere microbial taxa and their ratios were conducted under the healthy,incident and dead states from facility cultivation base.The results showed that from healthy to incident and to dead states the total bacteria decreased while the total fungi and the total actinomycetes increased;The ratio of bactieria and fungi（B/F）,ratio of bacteria and actiomycetes（B/A） and ratio of aerobes and anaerobes（Ae/An） could be used as the health index for carnation cultivation,disease prevention and control prediction;If rhizosphere B/F and B/A were lower than,or Ae/An higher than those of healthy carnation,the risk of wilt disease would occur to carnation.