不同氮磷比例营养液对AM真菌生长发育的影响  

Effects of nutrient solutions with different ratios of N to P on development of arbuscular mycorrhizal fungi

作　　者：陈宁[1] 王幼珊 杨延杰[1] 林多[1] 仇宏伟[1] 倪小会[2] 张美庆[2] 

机构地区：[1]莱阳农学院,青岛266109 [2]北京市农林科学院植物营养与资源研究所,北京100089

出　　处：《植物营养与肥料学报》2007年第1期143-147,共5页Journal of Plant Nutrition and Fertilizers

基　　金：国家自然基金项目(30070028);农业部引进项目(201058);博士启动基金(630306)资助

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。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.

关 键 词：氮磷比例 侵染率 菌丝量 孢子数 AM菌剂 

分 类 号：S144[农业科学—肥料学]