Desempenho animal em pasto de aveia e azevém com distintas biomassas de lâminas foliares

Abstract

Resumo -O objetivo deste trabalho foi avaliar o efeito de biomassas de lâminas foliares no desempenho animal. Utilizou-se mistura de aveia (Avena strigosa Schreb) e azevém (Lolium multiflorum Lam.), para determinar quantidades adequadas de sua biomassa no manejo da pastagem. , classificadas como baixa, média e alta, respectivamente. O método de pastejo foi contínuo, com taxa de lotação variada; os animais utilizados foram terneiros da raça Charolês e cruzados com Nelore, com idade inicial de nove meses. As variáveis de produção animal avaliadas, nos dois anos, foram: ganho médio diário, carga animal e ganho de peso vivo por área. As distintas biomassas de lâminas foliares mantidas não são fatores limitantes ao desempenho animal.Termos para indexação: Avena strigosa, Lolium multiflorum, oferta de forragem, taxa de lotação. Animal performance in oat and Italian ryegrass pastures under leaf lamina biomass levelsAbstract -The objective of this work was to evaluate the effect of different leaf lamina biomass over animal performance. A mixture of oat (Avena strigosa Schreb) and Italian ryegrass (Lolium multiflorum Lam.) was used to determine adequate levels of leaf lamina biomass for pasture management. , being classified as low, medium and high, respectively. Grazing method was continuous, with variable stocking rate; testing animals were calves of Charolais breed and its crosses with Nelore breed, with initial age of nine months. Evaluated variables in animal production, in both years, were: average daily gain, stocking rate and live weight gain per area. Leaf lamina biomasses evaluated are not limiting factors to animal performance.

Production parameters and forage loss of oat and rye grass pastures managed with beef heifers fed diets with energy supplementation

“…Although there were differences between the supplies, there was no limitation for animal performance, once the lowest supply found was 9.76 kg DM/100 kg LW and for intake to be unlimited, forage supply should always be higher than 4 to 6 kg/100 kg of LW (Mott, 1984). According to Bandinelli et al (2005), real supply of average biomass higher than 5.74 kg of DM/100 kg of LW allows individual gains higher than 1 kg/day. When grazing is managed with daily supply from 10 to 12 kg of DM/ 100 kg of LW, the maximum animal performance can be demonstrated (Hodgson, 1990), so heifers of all treatments had the opportunity to show their maximum potential of individual performance due to the supplies and per area, because the forage mass to which they were subjected was 1245.02 kg DM/ha (Table 3) on average.…”