Objective:

To evaluate the effect of the resting period and stocking rate on the productive response of weaner cattle in rotational grazing of Bothriochloa pertusa (L) A. Camus, on the savannas of Córdoba, Colombia.

Materials and Methods:

Forty-eight commercial Zebu cattle, were used with average weight of 200 ± 15 kg, in which three stocking rates were evaluated (2, 4 and 6 animals ha-1) and two resting periods (20 and 28 days), in a complete randomized block design, with 3 x 2 factorial arrangement, for six treatments in total. The yield, nutritional quality of the forages and daily weight gain of the animals, were evaluated. The direct and indirect costs were recorded, and from them the net profit, cost-effectiveness and balance point were determined.

Results:

The dry matter yield showed significant differences (p < 0,05), being higher in the treatments with stocking rate of 2 animals ha-1 and resting times of 20 (T1) and 28 (T2) days, with mean values of 1 055,4 and 1 265,4 kg DM ha-1, respectively. The nutritional composition of dry matter was not affected by the evaluated factors. The mean daily gain was significantly higher (p < 0,05) in treatment T1, for a value of 0,612 kg animal-1 day-1 as average. The treatments of the moderate stocking rate (4 animals ha-1) showed higher cost-effectiveness, which reduced the cost of the produced beef kilogram.

Conclusion:

From the productive and economic point of view, meat production through weaners on B. pertusa grasslands is more cost-effective when a moderate stocking rate is used.

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