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Registros recuperados: 1.076 | |
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Silva,Irenilson M. da; Pandorfi,Héliton; Vasconcelos,Ângelo J. S. de; Laurenti,Renato; Guiselini,Cristiane. |
Due to the importance of the environment on animal production and thus environmental control, the study aims to build a system for monitoring and control the meteorological variables, temperature and relative humidity, low cost, which can be associated with an evaporative cooling system (ECS). The system development included all the stages of assembly, test and laboratory calibration, and later the validation of the equipment carried in the field. The validation step showed results which allowed concluding that the system can be safely used in the monitoring of these variables. The controller was efficient in management of the microclimate in the waiting corral and allowed the maintenance of the air temperature within the comfort range for dairy cattle in... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Thermal comfort; Instrumentation. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100001 |
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Silva,Irenilson M. da; Pandorfi,Héliton; Almeida,Gledson L. P.; Guiselini,Cristiane; Henrique,Hugo M.. |
The aim of this paper was to evaluate the automated acclimatization effects during pre-milking of cows on thermal conditioning, physiology, milk production and cost-benefit of the automated adiabatic evaporative cooling system (AECS). The treatments 20; 30; 40 min and control consisted of exposure time of pre-milking cows to the automated AECS. Sixteen cows were used with an average daily milk yield of 19 kg, distributed in a 4 x 4 Latin square design. The Tukey's test (P<0.05) was used to compare the means. The environmental variables, dry bulb temperature (DBT, ºC) and relative humidity (RH, %), were recorded every minute, which allowed the determination of the system efficiency through the Temperature and Humidity Index (THI). The respiratory rate... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal comfort; Automation; Dairy cattle; Evaporative cooling system. |
Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000500002 |
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Almeida,Gledson L. P. de; Pandorfi,Héliton; Baptista,Fátima; Guiselini,Cristiane; Barnabé,Janice M. C. |
ABSTRACT The objective of this research was to evaluate the thermal efficiency of roofs used on individual shelters during milk-feeding stage of Girolando calves. The research was conducted at a farm located in a dry region of Pernambuco state, Brazil. The experimental design was completely randomized, with 27 Holstein × Gir dairy crossbred calves housed in shelters with three roofing materials (fibre cement tile, recycled tile, and thatched roofs). The recycled tiles and thatched roofs provided reductions of 18.7 and 14.6% in radiant thermal load, respectively. Regardless the roofing material, all animals increased their respiratory rate to maintain thermal equilibrium. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ambience; Dairy cattle; Roofing materials; Thermography. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000100013 |
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Campos,Alessandro T.; Castro,Jaqueline de O.; Schiassi,Leonardo; Yanagi Junior,Tadayuki; Pires,Maria de Fátima Á.; Mattioli,Cristiano C.. |
The goal of this study was to develop a fuzzy model to predict the occupancy rate of free-stalls facilities of dairy cattle, aiding to optimize the design of projects. The following input variables were defined for the development of the fuzzy system: dry bulb temperature (Tdb, °C), wet bulb temperature (Twb, °C) and black globe temperature (Tbg, °C). Based on the input variables, the fuzzy system predicts the occupancy rate (OR, %) of dairy cattle in free-stall barns. For the model validation, data collecting were conducted on the facilities of the Intensive System of Milk Production (SIPL), in the Dairy Cattle National Research Center (CNPGL) of Embrapa. The OR values, estimated by the fuzzy system, presented values of average standard deviation of... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Confinement systems; Bovine facilities; Design; Stalls; Dairy cattle. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600001 |
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Hirano,Marcio Y.; Silva,Celso L. da. |
ABSTRACT The increase in confined cattle breeding reflects the modernization and automation of farming, which has significantly intensified in recent years and caused an increase in the energy demand of rural properties. This study investigated the use of biogas generated from dairy cattle manure confined in gas microturbines on a farm to generate electricity and the energy use of exhaust gases. At the end of the study, 6,195 to 16,077 kWh month-1 of electricity was obtained, which corresponds to 43.3% of the property's self-sufficiency energy demand. By performing an exhaust gas energy exploitation, between 6.8 and 13.6 m3 day-1 of water heated to 368 K can be produced, or between 11,880 and 23,661 kWh month-1 of cooling capacity can be obtained using a... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy exploitation; Biogas; Dairy cattle; Microturbine. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400526 |
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FAMINOW, M. D.; OLIVEIRA, S. J. de M.; SA, C. P. de; VOSTI, S. A.; VALENTIM, J. F.. |
Foi desenvolvido um modelo para analisar a produção leiteira da pequena propriedade da Amazônia Ocidental, seus aspectos financeiros abordando a propriedade rural como um todo. O investimento em um sistema melhorado, centrado na implantação de pastagem melhorada associada com leguminosa, pareceu ser um investimento adequado para pequenos produtores. Entretanto, o investimento criou um longo período inicial de fluxos negativos que têm que ser financiados de alguma maneira, através de reservas existentes na própria unidade de produção ou por fontes externas. E esta é, provavelmente, a maior restrição à adoção das tecnologias propostas. |
Tipo: Folhetos |
Palavras-chave: Ouro Preto do Oeste (RO); Rondônia; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Gado Leiteiro; Produção Leiteira; Pequeno Produtor; Análise Econômica; Análise de Custo-Benefício; Dairy cattle; Cost benefit analysis; Economic analysis; Small-scale farming; Milk production. |
Ano: 1997 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/703114 |
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SILVA, M. V. G. B.; MARTINS, M. F.; CEMBRANELLI, M. de A. R.; PANETTO, J. C. do C.; PAIVA, L. DE C.; GONÇALVES, G. S.; MACHADO, M. A.; REIS, D. R. de L.. |
O documento Sumário de Touros/Resultados do Teste de Progênie/Junho 2018 apresenta ferramentas e recursos inovadores para profissionais e produtores, tais como, informações moleculares para genes de interesse, como no caso da Beta-caseína A1 ou A2, e as avaliações genéticas para idade ao primeiro parto e para produção de leite. |
Tipo: Livros |
Palavras-chave: Bovinos de leite; Melhoramento genetico; Raça girolando; Dairy cattle; Girolando; Breeding and Genetic Improvement. |
Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092584 |
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The Girolando breed progeny test was established in 1997, as a result of the partnership between Girolando and Embrapa Dairy Cattle. In 2007, the Programa de Melhoramento Genético da Raça Girolando - PMGG (Genetic Improvement Program of the Girolando Breed) was implemented. This Sire Summary/Progeny Test Results document has innovative tools and resources, for breeders and/or other professionals. Those include information regarding molecular markers, the Girolando Linear Evaluation System (SALG) and the updated genetic evaluation of age at first calving. The methods for analysis were modified for this current evaluation and are detailed further in this document. |
Tipo: Livros |
Palavras-chave: Gado de leite; Melhoramento genético; Melhoria; Raça girolando; Dairy cattle. |
Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1080947 |
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MORAES, E. de; PIENIZ, L. C.; ITALIANO, E. C.. |
Por falta de tradicao e informacoes tecnicas, o farelo de trigo, resultante do beneficiamento mensal de graos que garantem o abastecimento de farinha de trigo no Amazonas, e pouco utilizado na suplementacao de vacas leiteiras. Assim, visando demonstrar a importancia do farelo de trigo na alimentacao animal, conduziu-se, durante 150 dias (fevereiro a junho), um experimento para avaliar o efeito desse subproduto na producao de leite, no ganho de peso de vacas em lactacao e crescimento de bezerros. Foram utilizadas 25 vacas mesticas. Uma analise economica simplificada, baseada no custo/beneficiio, mostrou que a suplementacao com farelo para as vacas em lactacao foi viavel nas condicoes em que foi conduzido o trabalho. Ate o limite de 2 kg de farelo de... |
Tipo: Folhetos |
Palavras-chave: Farelo de trigo; Brasil; Amazonas; Nutrição; Vaca; Dairy cattle; Wheat bran. |
Ano: 1983 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/665311 |
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Registros recuperados: 1.076 | |
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