关键词: 丛枝菌根真菌, 孢子量, 侵染率, 生化因子

Abstract: Effect of biochemical factors on G. intraradices infection rates and spore yields were investigated in pot culture using sorghum (Sorghum vulgare Pers.) as the host plants. The results showed that G. intraradices infection rates and spore yields were significantly improved by biochemical factors in a debita spissitudine of single organic nitrogen and active substance. After the treatments of ammonium tartrate(0.5%), glycine (1%) and root lixivium (2 mL), spore yields of every 160 g sand sample were increased to 382 spores, 302 spores and 328 spores (the control was 155 spores), respectively. After the treatments of glycine (0.5%, 1%), ammonium tartrate (0.5%), ammonium humate (0.5%, 1%, 2%) and root lixivium (2, 3, 5 mL) , G. intraradices infection rates reached 537%, 52.8%, 43.9%, 59.4%, 48.9%, 57.7%, 64.9%, 55.9%, 52.9% (the control was 27.3%), respectively. Single C source (glucose, sucrose) had no influence on G. intraradices spore yields and infection rates. N source plus C source (NH4Cl plus glucose) in the C/N ratio of 4∶1 or 1∶2, spore yields of every 20 g sand sample gave rise to 2 227 spores and 2 458 spores (the control was 157 spores), respectively. While C/N ratio was 1∶2, the infection rates was 2.4% (the control was 19.3%). The ratio of 4∶1 had no remarkable effect. The function characteristics of biochemical factors on the infection rates and spore yields of G.intraradices were different．

Key words: Glomus intraradices, spore yields, infection rates, biochemistry factor