Euterpe precatoria in a multitrophic system with Piaractus brachypomus: characterization of substrates and plant growth

Coaguila-Dávila J.; Olsen Cárdenas C.; Alvez-Valles C.; César Villanueva C.; Nidia Llapapasca G.; Roberto Del Águila L.; Zoyla-Mirella Clavo P.; Cortegano C.A.A. · Revista de Investigaciones Veterinarias del Peru (2025) · DOI: 10.15381/rivep.v36i3.28948

Resumen

The study characterized the physicochemical parameters and nutrients in effluents and evaluated the growth of Euterpe precatoria in a multitrophic system with Piaractus brachypomus after 120 days of cultivation. Two aquaponic systems were established, G1 and G2 with 15 plants per system and a control group (CG) with 15 plants on a soil substrate. Plants in G1 and G2 were irrigated with effluent from P. brachypomus rearing with daily feeding at 2 and 5% of the biomass, respectively. Each aquaponic system consisted of a 600 L tank with 30 fish (280 g) + mechanical filter + biological filter + hydroponic bed with 15 plants under NFT system + final sump. Plants maintained in G1 and G2 did not modify (p>0.05) the physicochemical parameters of the irrigated effluent but reduced the P content (p<0.05), suggesting the use of this nutrient by the plants. There was a higher content of C and Mg in the soil substrate of the GC compared to the effluents, but there was no use of these nutrients, nor of N by plants using effluents. The survival of the plants indicated their adaptation to multitrophic systems, although the final growth in terms of plant length (18.20 cm), stem diameter (0.47 cm), number of leaves (3) and root length (10.67 cm), was not different between the groups (p>0.05). However, plants from aquaponic systems showed in cross-sectional histological sections the characteristic structure of a primary stem of monocot, unlike plants from the soil substrate. This pioneering work demonstrates that Euterpe precatoria can adapt and can be cultivated in its initial stages in multitrophic systems involving the rearing of P. brachypomus. © Los autores.

Instituciones: Universidad Nacional Mayor de San Marcos; Universidad Nacional de Ucayali