Organic beef production S14
Gomez, Pedro O.; Novaro Hueyo, Enrique; Rosso, Olga R.; Steffan, Pedro.
Estacion Experimental Agropecuaria Balcarce (INTA).(7620) Balcarce. Argentina. Fax (54) 266 21756
|Argentina, with year round grazing, places its
livestock production in a very competitive position to take advantage of the growing
worldwide trade for higher valued, low residue and organic produce from uncontaminated
environments. The hypothesis of this work was that it is possible to produce organic beef
at the same level as in conventional systems. In Balcarce, during two consecutive periods
(1993/95), applying the National Organic Livestock Production Standards, forty British
steers were fattened in four ecological beef systems differing in the season when animals
were supplemented, with two replicates. Ground maize grain with sunflower expeller(9:1)
was fed at 0.85 % of their liveweight. The treatments were: supplementing during the whole
period (with-with); supplementing during autumn-winter (with-nil); supplementing during
spring-summer (nil-with) and without supplementation (nil-nil). Within season, treatment
means were compared by analysis of variance using randomized blocks. During
autum/winter/93 there were not differences between treatments (P) and the average
liveweight gain was 244 g/an/day. In spring/summer the gain differences were significant
(P): 661, 750, 623 and 724 g/an/day, for treatments with-with, with-nil, nil-with and
nil-nil, respectively. The annual stocking rates were 2.6, 2.1, 2.3 and 1.9 an/ha,
respectively. During autumn-winter/94 there were not differences between treatments (P
0.05) and the average gain was 505 g/an/day. In spring/summer the steers in treatment
with-with, with-nil, nil-with and nil-nil gained 823, 647, 730 and 733 g/an/day,
respectively. The with-nil treatment gained statistically less weight than the rest (P).
The annual stocking rates were 2.4, 1.9, 2.1 and 1.8 animal/ha, respectively. The beef
production obtained ranged from 285 to 475 kg/ha/year, and was higher than the average
beef production from conventional fattenning systems of the region (250 kg/ha/year). The
results showed that it is possible to obtain relatively high levels of productivity from
organic beef systems.
Gomez, P.O. & Rosso, O.R. (1994): Produccion de carneecologica. In: VII Congreso Argentino de CienciasVeterinarias, p. 132.
Gomez, P.O. & Rosso, O.R. (1995): Produccion de carneecologica de novillos en distintos sistemas de alimentacion.1. Ganancia de peso y produccin de carne. Memorias XIVR euniĆn ALPA-19ú Congreso AAPA, p. 452 -454.