To investigate the effects of arbuscular mycorrhizal fungi(AMF)on tomato plant growth and its inhibitory effect on root-knot nematodes,a greenhouse pot experiment was conducted.The Funneliformis mosseae was inoculated in tomato seedlings along with second-stage juveniles of southern root-knot nematodes,while a control group without AMF inoculation was set up.The results showed that compared to the 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 decreased by 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 potassium content increased by 6.8%,20.7%,8.1%,and 7.8%respectively after AMF inoculation.Overall,these findings demonstrate that AMF inoculation promotes tomato growth,suppresses the occurrence of root-knot nematode disease in tomatoes,and increases nutrient levels in both plants and soil.
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