Abstract: Strong reductive approach refers to adding lots of organic materials into soil with waterflooding and plastic cover under high temperature. It is an effective, environmentfriendly, and broad-spectrum way to suppress soil-borne plant pathogens, but its application in controlling root-knot nematodes is limited. We investigated the efficacy of strong reductive approach in controlling root-knot nematodes and its effects on the physicochemical properties of soil after two months of tomato plant growth. The results showed that there was no significant difference in the quantity of 2 instar root-knot nematodes between strong reductive approach treatment and abamectin application. Strong reductive approach decreased the quantity of 2instar root-knot nematodes by 58.8%-97.2% compared with the control, and by 50.1%-96.6% compared with the waterlogging treatment. Strong reductive approach significantly increased root length, root surface area, and aboveground biomass of tomato when the addition level of organic materials was 4.16 g·kg^-1. Strong reductive approach increased soil pH by 5.1%, soil total nitrogen by 12.8%, and soil organic matter 3.4% compared with the control. Our results suggested that strong reductive approach could effectively control the propagation of root-knot nematodes and improve the physicochemical properties of soil.

Key words: China coastal area, Maxent niche model, Spartina alterniflora, potential distribution.