The intake of the dry matter (DM), the crude protein (CP) and the metabolizable energy intake (ME) in megacalories per day (Mcal/day) were not affected by the diets. In contrast, the intake of neutral detergent fiber (NDF), in g/kg BW, increased linearly. An increasing linear effect was also observed for the ether extract (EE) intake, whereas a decreasing linear performance was observed for the non-fibrous carbohydrate (NFC) intake. The digestibility of DM, organic matter and NFC decreased linearly with the […]

This experiment aimed to determine the influence of diets with inclusion of protected fat and vitamin E on performance, yield and carcass characteristics of feedlot lambs with different weights. Thirty-two non-castrated Santa Ines lambs were fed diets with a ratio of 40% forage and 60% concentrate ad libitum, with presence or absence of protected fat and/or vitamin E, in a total of four diets. Two weights of early containment were also considered: between 20 and 25 kg and between 30 […]

The objective of this study was to determine the best level of oil licuri concentrate on dairy cows. The best level was determined through an analysis of the milk’s chemical composition and fatty acid profile. Sixteen lactating cows from the Holstein × Zebu cross breed kept on Tanzania grass pastures were divided into four 4 × 4 Latin squares, which were formed by four experimental periods of 21 days. The 21-day experimental periods were divided into 17 days for adaptation […]

The objective of this study was to evaluate the daily intake and total apparent digestibility of dry matter, organic matter, crude protein, gross energy, ether extract, neutral detergent fiber, acid detergent fiber, total and non-fibrous carbohydrates, total digestible nutrients, energy intake and nitrogen balance of silages of six maize varieties with early or super early cycles recommended to Northeast Brazil. Twenty-four male castrated lambs were lodged in metabolic cages. A completely randomized design with six treatments and four replications was […]

A mathematical model based on Cornell Net Carbohydrate and Protein System (CNCPS) was developed and adapted in order to evaluate beef cattle rations at tropical climate conditions. The presented system differs from CNCPS in the modeling of insoluble particles’ digestion and passage kinetics, which enabled the estimation of fiber mass in rumen and its effects on animal performance. The equations used to estimate metabolizable protein and net energy requirements for gain, net energy requirement for maintenance and total efficiency of […]

This study aimed at estimating the kinetic parameters of ruminal degradation of neutral detergent fiber from agroindustrial byproducts of cashew (pulp and cashew nut), passion fruit, melon, pineapple, West Indian cherry, grape, annatto and coconut through the gravimetric technique of nylon bag, and to evaluate the prediction equation of indigestible fraction of neutral detergent fiber suggested by the Cornell Net Carbohydrate and Protein System. Samples of feed crushed to 2 mm were placed in 7 × 14 cm nylon bags […]

Avaliaram-se os consumos, as digestibilidades ruminal e intestinal e as taxas de passagem e de digestão de nutrientes em bovinos alimentados com dietas constituídas de silagem de milho, cana-de-açúcar triturada e fornecida in natura, cana triturada e ofertada após 72 horas de armazenamento, cana-de-açúcar ensilada com 1 % de cal e sem tratamento e um mesmo concentrado fixado em 1% do peso corporal. Todos os volumosos foram corrigidos com ureia/sulfato de amônio para conterem 10% de proteína bruta. Utilizaram-se cinco […]

Forages are essential for the successful operation of animal production systems. This is more relevant to ruminants which are heavily dependant upon forages for their health and production in a cost-effective and sustainable manner. While forages are an economical source of nutrients for animal production, they also help conserve the soil integrity, water supply and air quality. Although the role of these forages for animal production could vary depending upon the regional preferences for the animal and forage species, climate […]

Avaliaram-se o consumo e as digestibilidades total e parcial dos nutrientes, a eficiência microbiana, o balanço de nitrogênio, a taxa de passagem da digesta ruminal, o pH e a concentração de amônia ruminal em bovinos de corte alimentados com dietas contendo como fonte de volumoso pré-secado de capim-tifton 85 e silagem de sorgo nas seguintes proporções: 100:0; 68:32; 34:66 e 0:100, respectivamente, com base na MS. Foram utilizados quatro animais mestiços Holandês × Zebu (H × Z), fistulados no rúmen […]

Quatro éguas sem raça definida (idade e peso corporal médios de seis anos e 400 kg) foram distribuídas em delineamento experimental em quadrado latino para se avaliar o valor nutritivo e o estudo cinético do trato digestivo de grãos secos ou ensilados de sorgo de baixo e alto conteúdos de tanino na alimentação de eqüinos. Os tratamentos consistiram de dietas contendo dois híbridos de grãos de sorgo (baixo e alto níveis de tanino) e dois métodos de conservação (secos e […]