健康与罹病黄瓜根际微生物数量及真菌区系研究

Rhizosphere microorganism quantity and fungal flora of healthy and infected cucumber plants by F．oxysporum

摘要: 要对健康与罹病黄瓜根际微生物数量及真菌区系研究结果表明，健康与罹病黄瓜植株根际微生物数量存在明显差异，其中罹病黄瓜植株根际真菌、细菌数量明显高于健康黄瓜植株；而健康与罹病黄瓜植株放线菌数量无明显差异；健康黄瓜植株根系真菌种类为8种左右，常见真菌3～4种，优势种的菌落数占总菌落数的25％～56％。罹病植株根系真菌种类为2～4种，仅有稀少真菌和优势种，且优势种的菌落数占其总菌落数的88％以上，处于绝对优势，经证明其系引起黄瓜枯萎病的尖孢镰刀菌。

Abstract: The Rhizosphere microorganism quantity and fungal flora of the healthy and infected CUcumber plants by F ．oxysporum were studied．The results show that the rhizosphere fungi and bacteria quantity of the healthy plants are much higher than those of the infected ones．Quantities of rhizosphere actinomyces of the healthy and infected plants have no obvious difference．8 sorts of rhizosphere fungi emerge in the healthy plant，including 3～4 sorts of common fungi．Domirmant colonies of total iS from 25％ to 56％．Instead．only 2～4 sorts of rhizosphere fungi exist in the infected plant which iS rareand dominate fungi．The domi nant colonies occupy above 88％ of the tota1．which iS proved to he Fusarium oxysporum(Sch1．)f．sp．cucurnerinum．