接种丛枝菌根真菌对甘薯生长的影响研究

The effect of AM fungi on the growth of sweet potato

温室盆栽试验研究 3种丛枝菌根真菌 (AM )对甘薯生长的影响结果表明 ,灭菌土壤条件下接种 3种AM真菌 (GlomusmosseaeBEG16 7GlomusintraradicesBEG14 1和Glomussp .WUM2 6 )均不同程度促进甘薯对P的吸收和植株生长 ,其中BEG16 7和BEG14 1对甘薯效应显著高于WUM2 6 ;各接种处理菌丝长度差异及琥珀酸脱氢酶(SDH)活性与其对甘薯的生长效应基本一致 ;接种BEG16 7和BEG14 1的生长效应无显著差异 ,但接种BEG16 7菌丝长度显著大于BEG14 1,其原因可能是BEG16 7菌丝活性低于BEG14 1所致。未灭菌土壤条件下接种 3种AM真菌对甘薯的生长效应不显著 ,而土著AM真菌繁殖体数量较多可能是影响其接种效果的主要原因。

The effect of AM fungi on the growth of sweet potato in the pot culture is studied. The results show that soil sterilization inhibits the growth of sweet potato by either inoculation or not. The absorption of phosphorus and biomass of plant are significantly increased by inoculating Glomus mosseae,Glomus intraradices, Glomus sp.WUM26 among which G.m, G.i are more effective. Colonization rate, hyphal density and SDH activity of introduced AM fungi are accordant with their effects on the growth of the sweet potato. The hyphal density in soil inoculating G.m is much larger than that in soil inoculating G.i, while that of G.i is much larger than that of G.s. For the non-sterilization treatments, the effect of inoculation is not significant in term of sweet potato biomass,which is probably caused by the presence of propagule of the indigenous AM fungi in the experimental soil.