Abstract：Abstract：To investigate the effects of arbuscular mycorrhizal fungi（AMF）on tomato plant growth andits inhibitory effect on root-knot nematodes，a greenhouse pot experiment was conducted．The Funneliformismosseae was inoculated in tomato seedlings along with second-stage juveniles of southern root-knotnematodes，while a control group without AMF inoculation was set up．The results showed that compared tothe control group，the aboveground fresh and dry mass of tomato seedlings significantly increased by 18.1%and 24.8%，respectively，after AMF inoculation．The disease index of root-knot nematode infection decreasedby 29.5%．The content of N，P，and K in plants increased by 6.9%，80.5%，and 63.0%，respectively．Additionally，soil ammonium nitrogen，nitrate nitrogen，available phosphorus，and available potassiumcontent increased by 6.8%，20.7%，8.1%，and 7.8% respectively after AMF inoculation．Overall，thesefindings demonstrate that AMF inoculation promotes tomato growth，suppresses the occurrence of root-knotnematode disease in tomatoes，and increases nutrient levels in both plants and soil．
