In a greenhouse experiment, we investigated the influence of leek (Allium porrum) intercropping, mycorrhizal fungi and earthworms on the root-knot nematode infection by Meloidogyne incognita (RKN) and the growth and development of tomato plants (Solanum lycopersicum). Tomato plants were grown in pots, intercropped with leeks or in monoculture, and earthworms and/or arbuscular mycorrhizal fungi (AMF) were introduced. The effects of these two treatments on root-knot nematode infection and tomato plant growth and development were assessed i) by counting the galls induced by the nematodes and the number of egg masses on their roots, and ii) by measuring their height increase, shoot and root dry biomasses and flowering time. Tomato growth was increased with leek compared to the monoculture (e.g., +82% shoot biomass), probably due to a lower plant-plant competition, although a facilitation effect cannot be excluded. The presence of leeks did not reduce the number of galls (per g of root). The presence of AMF (Rhizophagus irregularis) increased the overall infection of M. incognita (e.g., +36% egg masses) and induced more galls with multiple egg masses in the leek-tomato association (+71%) but did not increase plant biomass. On the other hand, it increased plant height in presence of the compost earthworms (Eisenia andrei) compared to earthworms alone with RKN (+2%). It also delayed the flowering compared to RKN alone (+7.6 days in average). Competition between the two tomato plants in monoculture probably strongly impacted plant growth, flowering time and thereby the RKN infection, but leek-tomato interactions should be further examined. The overall increased number of multiple egg masses per gall in presence of AMF is contrary to its protective effect reported in the litterature.

在温室试验中，我们研究了韭菜（Allium porrum）间作、菌根真菌和蚯蚓对根结线虫（Meloidogyne incognita，RKN）感染和番茄植株（Solanum lycopersicum）生长发育的影响。）。番茄植株种植在盆中，与韭菜间作或单作，并引入蚯蚓和/或丛枝菌根真菌 (AMF)。评估这两种处理对根结线虫感染和番茄植株生长发育的影响 i) 通过计算由线虫引起的瘿及其根上的卵块数，以及 ii) 通过测量它们的高度增加、芽和根干生物量和开花时间。与单一栽培相比，韭菜的番茄生长增加（例如，+82% 地上部生物量），这可能是由于较低的植物-植物竞争，尽管不能排除促进作用。韭菜的存在并没有减少瘿的数量（每克根）。AMF（不规则根瘤菌）的存在增加了总体感染M. incognita（例如，+36% 的卵块）并在韭菜-番茄组合中诱导更多具有多个卵块的瘿（+71%），但没有增加植物生物量。另一方面，与单独使用 RKN (+2%) 的蚯蚓相比，它在堆肥蚯蚓 ( Eisenia andrei ) 的存在下增加了植物高度。与单独的 RKN 相比，它还延迟了开花（平均 +7.6 天）。单一栽培中两种番茄植物之间的竞争可能强烈影响植物生长、开花时间，从而影响 RKN 感染，但应进一步检查韭菜-番茄的相互作用。在存在 AMF 的情况下，每胆多卵块的总体数量增加与其文献中报道的保护作用相反。