Use of olive mill waste compost and arbuscular mycorrhizal fungi in the fertilization of ryegrass

Carneiro, J.P.; Monteiro, M.C.H.; Veloso, Abel; Soto, Jesús; Almeida, C.A.M.; Nunes, José Manuel; Andrade, L.P.

http://hdl.handle.net/10400.11/7113

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Organic matter has an unquestionable important role in agriculture productivity due to its capacity to store water and nutrients, increase of the soil biodiversity and immobilize pollutants. Although fresh olive mill waste has phytotoxic properties, its compost can be used as a fertilizer. Mycorrhizal fungi can, potentially, increase crop productivity due to its relation with higher water and nutrients absorption by the roots. This work intended to evaluate the application of mycorrhizal fungi and composted olive mill waste on biomass production of ryegrass. The results showed that the olive mill waste compost could be used as an alternative source of fertiliser for ryegrass, but there must be a simultaneous application of inorganic nitrogen and phosphorus fertilizer. In that case, the application of mycrorrhizal fungi demonstrated to be able to improve ryegrass forage yield.