杉木解酚菌的研究

从杉木林土壤中筛选到5株高效解酚菌(F₂、F₃、F₄、F₇、F₁₅),结果表明,F₄、Fd,F₂、F₁₅5d能将600rng·L^-1的阿魏酸降解完,F₇的降解率为91.3%;F₄、F₃、F₂、F₇d,F₁₅、4d能将600mg·L^-1的对羟基苯甲酸完全降解;5株解酚菌对邻香草醛的降解能力较弱,除F₂5d能将300mg·L^-1的邻香草醛完全降解外,其余4株5d的降解率为83%～96%.同时发现,F₄能抑制杉苗生长,而其余4株则能在不同条件下促进杉苗生长,将5种菌按等比例混合使用,在土壤添加酚酸的情况下,仍能促进菌根苗Z和非菌根苗生长,杉木苗干重增长率为8.9%～168%.

Phenolic acid degradation fungi screened from successive plantation site of Chinese fir

Successive plantation of Chinese fir (Cunninghamia lanceolata) leads an obvious decline of soil fertility. To solve the urgent problem,five fungal species (F₂,F₃,F₄,F₇,F₁₅ ) which can effectively degrade phenolic acid were screened to degrade the toxic material in successive plantation site and to improve the soil bioactivity.Pot experiment showed that all test fungus,except F₄,could improve plant growth individually,but not counteract the effect of phenolic acid.Inoculating five inoculated fungi mixed with equal proportion not only counteracted the inhibitory effect of phenolic acid but also improved the growth of Chinese fir uninoculated with VAM fungi but inoculated with G.mosseae.