Abstract

FILIPPI, Mónica A.; GODOY, I.; ROSSI, A.L.  and  MARCOZZI, P.. Avances sobre el manejo de arvenses en la huerta agroecológica. RIA. Rev. investig. agropecu. [online]. 2023, vol.49, n.1, pp.41-44. ISSN 1669-2314.

In conventional agriculture, chemical fallow is an efficient practice to counteract the effect of weeds on the crop, although with risks of environmental impact. Agroecology proposes environmentally friendly management practices to reduce competition. The mulch technique has proven to be efficient and constitutes an agroecological management option against the use of herbicides. This work proposed to evaluate the effect of a polyethylene cover prior to cultivation (“fallow”) and during cultivation as a cover (straw and polyethylene mulch) on weed biomass in an agroecological garden system. The weeds present were identified as annual: differentiating them into grasses and broadleaved and the perennial species found were: chives (Cyperus rotundus L.), gramón (Cynodon dactylon L.) and teardrop (Nothoscordum gracile). Two cultivation associations were implanted: (chard-leek) and (broad beans-lettuce) in a randomly distributed plot design (Tukey’s test < 0.05%). covers during cultivation. Under the test conditions, crop associations did not influence weed growth (p=0.6). No interaction was detected between the pre-cultivation environments and cover treatments in the biomass of annual weeds: grasses and broadleafs (p=0.6). Ground cover during cultivation: straw and black polyethylene, were equally effective in reducing the biomass of annual weeds, regardless of their type (p=0.003). The combination of prior fallow practice with polyethylene and straw mulch during cultivation crop, decreased the biomass of grass (p=0.01) and chives (p=0.02) although they had no effect on tear growth (p=0.5).

Keywords : cover; fallow; weeds; agroecology.

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