Abstract

AVILA-PERALTA, Oscar et al. Growth and nutritional status of tomato in response to organic substrates and mycorrhizal fungi. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.spe12, pp.2409-2422. ISSN 2007-0934.

The main function of mycorrhizal fungi is to facilitate water absorption, phosphorus (P) and nitrogen (N) to plant, in addition to improve physicochemical properties of soil and aggregate formation through particle adhesion due to protein exuded by the mycelium called Glomalin. The aim of this study was to evaluate the effect of two arbuscular michorrizal fungi consortia and a commercial species (Rhizophagus irregularis) combined with a substrate based on vermicompost or peat on development of tomato plants (Solanum lycopersicum. Rio Grande). The experimental design was a randomized complete block with a factorial arrangement 2x4, with 8 treatments and 6 replications each replication consisted of a container per plant. 1 g of commercial mycorrhizal (500 ea g-1), and 100 g (500 ea g-1) of native soil per plant was applied. The variables plant height, stem diameter, root length, root, shoot and total plant dry weight were affected by the substrates and fungi and the interaction between these factors. The mycorrhization percentage was also affected by interaction, roots plants grown in vermicompost and peat inoculated with CN1 had the highest percentage of mycorrhization, for the first sampling, plants grown in peat decreased the percentage of mycorrhization compared with those developed in vermicompost. Nutrients concentration decreased compared with control excluding nitrogen.

Keywords : Solanum lycopersicum; Rhizophagus irregularis; mycorrhization; phosphorus.

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