The hyphal density paralleling with ridge was much more higher than it in the non - inoculation treatment . a field experiment was carried out to test the effectiveness of the selected isolates with sweet potato as host plant 接种处理中平行于垄的方向的菌丝密度和活性菌丝密度显著增加，根内菌丝的alp活性和根外菌丝的sdh活性提高。
