Densidade de semeadura de ervilhaca em pastagem de aveia e azevém utilizada para a recria de bovinos de corte

Abstract

The study was conducted to evaluate the effects of different seeding rates of vetch (Vicia sativa L.) mixed with oat (Avena strigosa Schieb) plus annual ryegrass (Lolium multiflorum) in the structural and chemical composition of pasture, density and population dynamics of, and performance of beef steers. The experiment was conducted at the Federal Technologic University of Paraná in Dois Vizinhos. An area of 8.3 ha, divided into 11 paddocks of 0.75 ha. The experimental design was completely randomized blocks with four treatments: oat + ryegrass, oat + ryegrass + 15 kg/ha vetch, oat + ryegrass + 30 kg/ha vetch and oat + ryegrass + vetch 45 kg/ha, with 76 days of evaluation. Pasture production, density and population dynamics of tillers bromatological quality and productive performance of heifers were evaluated. The grazing method was continuous stocking to keep herbage allowance of 15%. There was no effect (P>0.05) among treatments for pasture production parameters. The higher vetch proportion the higher the average daily weight gain (ADG) obtained. The stocking rate and gains weight per area were similar within treatments and periods, averaging 877.48 kg/ha. Chemical analyzes there was an increase in protein only for vetches with increasing density.