ABSTRACT This study investigated the knowledge and perception of Brazilian pig producers in terms of environmental enrichment (EE) for pigs, the materials used, and the forms of presentation, identifying the single conditions that can improve their application on pig farms. A questionnaire was applied to 1340 farms – representing 7.4% of the farms and 12% of the sows in the country. The questions included descriptions of farms and respondents, their knowledge, judgments and level of interest in the use of […]

ABSTRACT The objective of this study was to evaluate performance, hematological parameters, leukocyte counts, and respiratory microbiota of broilers under heat stress receiving eucalyptus oil supplementation. Cobb broilers (n = 1200) were randomly distributed on the first day of life in a factorial arrangement with additional treatment (2 × 2 + 1) with two periods of oil administration via drinking water (daily, from 18 to 35 days of life) and two periods of oil administration via spray (daily, from 18 […]

Two experiments were conducted to evaluate the evaporative cooling of the air at farrowing on the performance of lactating sows under high environmental temperature conditions in the Central West region of Brazil. One hundred and forty-four lactating sows – 46 of first and second farrowing (experiment I) and 98 from the third to eighth farrowing (experiment II) – were used. Sows were distributed in experimental design of randomized blocks consisting of two rooms (with air cooling and control), with the […]

O objetivo neste estudo foi identificar possíveis alterações na composição e no processo de compostagem dos dejetos produzidos por bovinos Canchim e Nelore em diferentes períodos do confinamento alimentados com diferentes proporções de volumoso e concentrado. O experimento foi conduzido em delineamento inteiramente casualizado em esquema fatorial com parcelas subdivididas no tempo. As parcelas foram compostas por quatro tratamentos: dejetos provenientes de duas dietas (40% de volumoso e 60% de concentrado e 60% de volumoso e 40% de concentrado) e […]

The objective of this study was to find an alternative to minimize environmental contamination by leather waste using it as ruminant feed. The wet blue leather wastes (WB) without chrome extraction were compared with the leather wastes in which the chrome was extracted (CE). Both materials had 99.7% of dry matter (DM), but the crude protein level was higher (90.4%) in CE than in WB (74.3%). In situ effective ruminal degradability of DM was 59.7% and it was 63.1% for […]

The objective of this research was to evaluate different minimum ventilation systems, in relation to air quality and thermal comfort using geostatistics in brooding phase. The minimum ventilation systems were: Blue House I: exhaust fans + curtain management (end of the building); Blue House II: exhaust fans + side curtain management; and Dark House: exhaust fans + flag. The climate variables evaluated were: dry bulb temperature, relative humidity, air velocity, carbon dioxide and ammonia concentration, during winter time, at 9 […]

Neste trabalho são analisadas algumas alternativas tecnológicas para o desenvolvimento de pequenas graxarias destinadas à pequena produção de carne. É considerado que a substituição do conceito de “resíduos animais” pelo conceito de “matéria-prima para graxaria” pode ser amplificada com algumas implementações no processo produtivo, agregando valor aos subprodutos animais, no sentido de uma produção mais limpa, o que reduz o impacto ambiental da atividade e os riscos das más condições higiênicas.

Minerais, inclusive elementos traços, e vitaminas são atualmente adicionados nas rações de suínos objetivando obter performance adequada para genótipos modernos criados em confinamento. A maioria do conteúdo de mineral e vitamina dos cereais e compostos protéicos é caracterizada por sua baixa e variável disponibilidade. Dietas suplementares são então geralmente necessárias. Este artigo, baseado em dados de literatura, revê a exigência do suíno para minerais e vitaminas objetivando assegurar desempenho econômico e rentável. Recente pesquisa tem focado no fósforo devido às […]

Grasslands have to be considered not only as a mean for providing foods for domestic herbivore but also as an important biome of terrestrial biosphere. This function of grasslands as an active component of our environment requires specific studies on the role and impact of this ecosystem on soil erosion and soil quality, quality and quantity of water resources, atmosphere composition and greenhouse gas emission or sequestration, biodiversity dynamics at different scales from field plot to landscape. All these functions […]