Effect of supplementation level on performance of growing Nellore and its influence on pasture characteristics in different seasons

Abstract

Eighty-four Nellore bulls (269 ± 27 kg; 13 months) were used in a completely randomized design to evaluate different supplementation strategies on the performance of growing Nellore cattle grazing Panicum maximum cv. Tanzania in the rainy season and rainy-to-dry season transition. In the rainy season, 42 animals received mineral salt (MS) ad libitum and 42 received protein supplement (PR) at 1 g kg À1 body weight (BW). In the rainy-to-dry season transition, 28 animals received MS, 28 received PR at 1 g kg À1 BW, and 28 received a protein-energy (PE) supplement at 3 g kg À1 BW. In the rainy season, the PR supplement increased average daily gain (ADG), providing a significant increase of 17 kg in final BW. In the first period of the rainy-to-dry season transition, PE promoted better performance than MS, while PR did not differ from the two other treatments. In the second period of the rainy-to-dry season transition, PE and PR increased ADG by 41% and 31%, respectively, compared with MS. In the third period, all supplements differed from each other. Bulls fed PE had greater final BW compared with animals fed PR and MS. In conclusion, during the rainy season, PR supplementation should be provided even under good pasture conditions. Also, during the rainy-to-dry season transition, protein-energy supplementation is recommended to compensate for quantitative and qualitative deficiencies of the pasture. HIGHLIGHTS Nellore cattle being backgrounded on pasture with supplementation has greater body weight in the feedlot entry. Supplementation is recommended to compensate for quantitative and qualitative deficiencies of the pasture. Supplementation promotes a positive response in animal performance.

Dietary Concentrate Supplementation Alters Serum Metabolic Profiles Related to Energy and Amino Acid Metabolism in Grazing Simmental Heifers

“…Higher ADG and final BW values in the heifers from the SUP group than in those from the CON group were recorded, which was in accordance with other studies concerning concentrate supplementation of growing cows in a summer pasture ( 4 ). These results suggest that concentrate supplementation could be effective in improving the performance of grazing heifers.…”

“…Most beef cattle are grazed extensively on pasture without any feed supplements on the grasslands of Inner Mongolia in northern China, which results in decreased animal performance and low productivity ( 3 ). Many researchers have revealed that the dry matter intake (DMI) and productivity of grazing ruminants during periods of pasture grazing or nutrient deficiencies could be improved by supplementation with protein ( 4 ), minerals ( 5 ), or multinutrient concentrates ( 6 ). Pasture availability and nutritive value seem to be sufficient to meet the requirements for cattle grazing in summer.…”

Effect of mineral-energy supplementation on the performance of young bulls from different genetic groups on pasture

“…Similarly, Lima et al (2012) found that the supplementation strategies evaluated resulted in similar performance when used during the rainy-dry transition period, under conditions of high forage supply, allowed a great selective capacity of animals for more nutritious parts of the plants, that is, the leaves, thus decreasing the effect of increasing levels of supplementation on animal performance. Roth et al (2019) also reported that in the rainy season, performance was not influenced by the level of supplementation, due to the high quality of the forage combined with less need for selection during grazing, due to the lower stocking rate.…”

Recria intensiva em confinamento como estratégia de manejo em bovinos de corte - revisão de literatura

“…Para o manejo dos bezerros, é essencial que todo o processo seja conhecido, com o intuito de prosseguir com os ganhos de peso ao rebanho, bem como a venda e comercialização da carne (Valle e Pereira, 2019). Roth et al, (2019), evidenciaram o uso de suplementação dos bovinos de corte de 16 meses de idade, a intensificação ajuda a potencializar o aumento do peso do animal, bem como melhora o rendimento da carcaça e da carne, também tem como benefício o encurtamento do ciclo de vida. Todas as estratégias utilizadas durante a recriam afetam diretamente o desempenho futuro dos animais e aqueles que durante essa fase obtiverem variáveis diferentes, iniciam a fase terminação também com índices corporais diferentes, isso gera carcaças de pesos desuniformes, consequentemente, acarretando resultar em variação na remuneração final pela falta de padronização do produto final (Costa, et al, 2018).…”