Níveis de proteína bruta e suplementação de aminoácidos em rações para leitoas mantidas em ambiente termoneutro dos 60 aos 100 kg

Orlando, Uislei A; Oliveira, Rita Flávia Miranda de; Donzele, Juarez Lopes; Ferreira, Rony Antonio; Silva, Francisco Carlos de Oliveira; Vaz, Roberta Gomes Marçal Vieira; Siqueira, Jefferson Costa de

doi:10.1590/s1516-35982006000200020

Cited by 6 publications

(9 citation statements)

References 13 publications

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“…Based on the values of mean air temperature and BGHI, it can be inferred that pigs were exposed to periods of heat stress considering the thermoneutral range for this animal category proposed by Coffey et al (2000) and Orlando et al (2006).…”

Section: Resultsmentioning

confidence: 99%

Nutritional plans of digestible lysine for growing-finishing gilts

et al. 2014

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-This experiment was conducted to evaluate nutritional plans of digestible lysine (DLys) for growingfinishing gilts. Eighty gilts with 63 days of age and an initial weight of 24.2±1.52 kg were distributed in a completely randomized block design, with five nutritional plans of DLys (9-8-7, 10-9-8, 11-10-9, 12-11-10, and 13-12-11 g/kg, from 63 to 103, 104 to 133, and 134 to 153 days of age, respectively) and eight replicates. Pigs were housed in pairs and fed their respective diets ad libitum throughout the experimental period (90 days). To monitor the animal development along the experiment at 103 and 133 days, gilts were weighed and subjected to analysis of ultrasound for evaluation of loin depth (longissimus dorsi) and backfat thickness. At the end of the experiment (153 days of age) the animals were weighed, and after slaughter carcasses were evaluated individually using a typifying pistol to evaluate the percentage and the content of carcass meat, loin depth and backfat thickness. From 63 to 133 days, there was no effect of the nutritional plans on daily feed intake, performance, or backfat thickness; however the loin depth was greater in the gilts that received plans with high levels of DLys (12-11; 13-12 g/kg) compared with the plan with the lowest level (8-7 g/kg). For the entire period (63 to 153 days), no influence of the nutritional plans was observed on the daily feed intake, performance variables, or carcass characteristics. A nutritional plan containing 9-8-7 g/kg of digestible lysine fed from 63 to 103, 104 to 133 and 134 to 153 days, respectively, meets the requirements for performance and carcass characteristics of growing-finishing gilts.

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Section: Resultsmentioning

confidence: 99%

Nutritional plans of digestible lysine for growing-finishing gilts

et al. 2014

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“…BGHT index values characterized as thermoneutral environment by Orlando et al (2006) were close to 69.1 and 68.7 for swine kept under thermal comfort. As observed in Figure 5, these values were not achieved in the environment with and without evaporative cooler, showing that, despite the temperature decreases and RH increases using coolers, they were not effective in promoting animal thermal comfort.…”

Section: Resultsmentioning

confidence: 64%

Geostatistics applied to swine facilities equipped with evaporative cooling system

Abreu

Costa

Feddern

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe purpose of this study was to evaluate the spatial variation of temperature, relative humidity and black globe humidity temperature (BGHT) index in growing-finishing swine facilities, with and without evaporative air cooler. The experiment was conducted in a 60 x 9 m facility containing 32 pens of 3.20 x 4.00 m each, divided into two sectors. The treatments were without evaporative air cooler (control) and with evaporative air cooler. Temperature and relative humidity data were collected weekly in two periods (morning and afternoon) at 32 different sampling points, encompassing the center of each pen and the outer perimeter of the facility. Animal performance variables were: feed intake, feed conversion, weight out of the nursery, slaughter weight, weight gain and daily weight gain. According to the results, the analyzed variables showed spatial dependence, with lower temperature and higher relative humidity in the evaporative air cooler environment. However, evaporative air cooler system provided better environment thermal conditions inside the facilities, lowering BGHT values, which were lower in the adiabatic cooling sector. Although thermal conditions were better in the air cooler environment, swine performance was not affected.Geoestatística aplicada às instalações suínas equipadas com sistema de resfriamento evaporativo R E S U M O Objetivou-se, neste trabalho, avaliar a variação espacial da temperatura, umidade relativa e índice de temperatura de globo negro e umidade (ITGU) em instalações de suínos na fase de crescimento e terminação, com e sem resfriador de ar evaporativo. O experimento foi conduzido em uma edificação de 60 x 9 m, contendo 32 baias de 3,20 x 4,00 m cada uma, divididos em dois setores. Os tratamentos foram sem resfriador de ar evaporativo (controle) e com resfriador de ar evaporativo sendo os dados de temperatura e umidade relativa coletados semanalmente em dois períodos (manhã e tarde) em 32 pontos de amostragem diferentes abrangendo o centro de cada baia e o perímetro exterior das instalações. As variáveis de desempenho dos animais foram: consumo de ração, conversão alimentar, peso ao sair da creche, peso ao abate, ganho de peso e ganho de peso diário. Os resultados mostraram que as variáveis analisadas apresentaram dependência espacial com temperatura mais baixa e umidade do ar mais alta no setor com resfriador evaporativo. Desta forma, o resfriamento evaporativo melhorou as condições térmicas ambientais no interior da instalação, reduzindo os valores do ITGU, os quais foram menores no setor de resfriamento adiabático. Embora o conforto térmico do ambiente com resfriamento evaporativo tenha sido melhor, os suínos não responderam a esta melhoria, em termos de desempenho. Key words:animal welfare spatial analyses environment conditions semivariogram Palavras-chave: bem estar animal análise espacial condições do ambiente semivariograma

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“…A temperatura média do ar ficou dentro da faixa ideal recomendada por SAMPAIO et al (2004). O ITGU Ciência Rural, v.40, n.2, fev, 2010. obtido foi próximo aos 69,1 e 66,9 verificados, respectivamente, por TAVARES et al (2000) e ORLANDO et al (2006), para suínos mantidos em ambiente termoneutro. Assim, de acordo com a literatura e com os valores obtidos neste estudo, pode-se caracterizar o ambiente como sendo de termoneutralidade.…”

Section: Resultsunclassified