【摘要】 温室条件下,研究不同氮磷比例营养液对丛枝菌根(Arbuscular mycorrhizae,AM)真菌(Glomus mosseae)生长发育的影响。结果表明:在一定磷水平条件下增加氮的水平,有利于菌根真菌的生长发育,但超过一定水平则会抑制菌根真菌的生长发育,说明氮水平也会影响菌根真菌的生长发育,这种影响与氮磷比例有关。综合比较菌根长度、根外菌丝量及孢子数三项指标,在20%浓度Hoagland营养液的基础上,将氮磷比例提高到4∶2有利真菌生长。在AM菌剂生产中,通过营养液中氮磷比例的调控能获得较大数量的侵染根段、菌丝及孢子等繁殖体。更多还原

【Abstract】 Under greenhouse conditions,the influences of eight nutrient solutions with different ratio of N to P on the growth of arbuscular mycorrhizalfungus Glomus mosseae were studied.The results showed that increasing N could improve the growth of AM fungi under certain phosphorus supplying level,but excessive N inhabited its growth.It suggests that the development of mycorrhizal fungi are influenced by N and the ratio of N to P.By comprehensive comparison of total length of external hyphae,colonized root length and spore numbers,the optimum N∶P ratio in 20% Hoagland solution for fungi growth was 4∶2.Therefore,rational regulating the N∶P ratio in nutrient solution could enhance the development of AM fungi to obtain more colonized roots,external hyphae and spores when AM fungal inoculum was produced under greenhouse conditions.更多还原