Our hypothesis was that different sources of unsaturated fatty acids from oilseeds (sunflower, soybeans, and cottonseed) could alter milk yield, fatty acid profile, and the amount of unsaturated fatty acids yielded in milk. It aimed to evaluate the effects of lipid sources on yield and composition and fatty acids in milk of primiparous Girolando cows. Five cows in lactation (35 ± 8 days), with 410 ± 7.15 kg BW were randomly distributed in a 5 x 5 Latin square. Five experimental diets, namely a control diet without an additional source of lipid and four diets with different lipid sources: cottonseed, sunflower seed, whole soybean, or soybean oil, as lipid source, to reach 70 g/kg of ethereal extract dry matter basis were used. Cottonseed and soybean oil addition reduced daily yield by 15 and 22%. Oilseed can alter fatty acid profile in milk. Whole soybean provided greater daily milk and fatty acids yields.
Objetivou-se neste estudo avaliar o efeito de dois protocolos de suplementação proteica energética no desempenho e viabilidade econômica de bezerros nelore não castrados ao desmame a terminação a pasto. Foram utilizados 40 bovinos da raça Nelore com 8 meses de idade, peso médio 285,16±22,74 Kg, pertencentes à Fazenda Fronteira município de Porto Murtinho, Mato Grosso do Sul, avaliados entre maio de 2015 e setembro de 2016. Analise de desempenho dos animais apresentou efeito, entre os tratamentos para peso final, o ganho médio total e ganho de peso médio diário. Os bovinos suplementados com Protocolo 2 consumiram maior quantidade de matéria seca (807,57 kg) que os animais do Protocolo 1 (427,03 kg). Com este nível de consumo de matéria seca também houve aumento na quantidade de proteína bruta fornecida para o Protocolo 2 em 320,17 kg. A maior receita total observada foi Protocolo 1 (R$ 2.868,90) este resultado está associado ao peso final superior e ao rendimento de carcaça de 52,6% após o abate, embora o Protocolo 2 tenha apresentada maior rendimento de carcaça (54%). Conclui-se que A suplementação do Protocolo 1 foi mais eficiente para desempenho, no entanto a receita total foi insuficiente para pagar os custos de produção, gerando uma rentabilidade negativa devido ao gasto com suplementação no período experimental.Palavras chaves: bovino de corte, ganho de peso, suplementação a pasto Performance and economic viability of young bulls submitted to different supplementsABSTRACT. The objective of this study was to evaluate the effect of two energy protein supplementation protocols on performance and economic viability of Nellore bulls calves from weaning to pasture finishing. Nellore calves with 8 months of age, mean weight 285.16 ± 22.74 kg, belonging to the Fronteira Farm municipality of Porto Murtinho, Mato Grosso do Sul, were evaluated between May 2015 and September 2016. Analysis, between the treatments for final weight, mean total gain and average daily weight gain. Steers supplemented with Protocol 2 consumed more dry matter (807.57 kg) and Protocol 1 animals (427.03 kg). As this level of dry matter consumption there was also an increase in the amount of crude protein supplied to Protocol 2 in 320.17 kg. The highest total income
Pantaneiro cattle (Bos taurus taurus) is a breed locally adapted to the Brazilian Pantanal. Local breeds are essential for the quality production of organic systems based on planned grazing practices, because of their results in resilient and productive ecosystems, enhancing biodiversity. This study aimed to evaluate the performance of Pantaneira primiparous cows, and systems with reduced use of concentrate, simulating organic production conditions. Five animals, with an average body weight of 396.2 ± 43.5 kg, were kept in individual continuous grazing regimes and supplemented with different concentrate levels (1.2%, 0.9%, 0.6%, 0.3%, and 0.0% of body weight). The animals were allocated at random in a 5 × 5 Latin square design repeated twice during the study time. The cows had a low dry matter and nutrient intake with a reduction in concentrate level, with improvement in neutral detergent fiber digestibility and a reduction in total nutrient digestibility. No changes were observed in plasma glucose levels or urea excretion, but the plasma urea nitrogen decreased with reductions in concentrate levels. There was a reduction in milk yield, but the energy-corrected milk was not affected by the reduction in concentrate levels; furthermore, the milk yield efficiency was not affected. The milk fat content improved with the reduction in concentrate levels. The Pantaneira breed has the genetic potential for the maintenance of competitive production and quality in organic systems.
This research communication describes the influence of diet, mammary quarter position and milking process on the temperature of teats and udder of cows fed diets containing different lipid sources. Five primiparous cows were fed diets containing cottonseed, sunflower seed, soybeans or soybean oil as a source of lipids and a reference diet without the inclusion of lipid sources in a 5 × 5 Latin Square design. Milk yield was determined in the last five days of each period. Milk samples were collected for SCC analysis on the last two days of each experimental period. The images of the mammary gland were obtained using an infrared camera and were analyzed with appropriate computer software. Milk yield was 14.8% higher for cows fed soybeans as a source of lipids. Diets and somatic cell counts did not influence the temperature of teats and udder. The milking process reduced the temperature of teats and udder by 0.79°C. Rear teats and rear quarters had higher surface temperatures than front teats and fore quarters. Changes in temperature of teats and mammary quarters occurred as a function of the milking process and quarter position. However, the diet and the SCC did not influence the temperature of teats and mammary quarters in this experiment.
RESUMO.O objetivo deste trabalho foi avaliar o desempenho de dois grupamentos genéticos de novilhos F1 Angus*Nelore e Nelore em confinamento a pasto e sua viabilidade econômica. O experimento foi conduzido na Fazenda São Geraldo localizado no município de Bonito -MS. Foram utilizados 94 novilhos, sendo distribuídos em blocos casualizado, totalizando dois tratamentos. Tratamento 1 -50 novilhos F1 Angus x Nelore peso médio de 459,32 kg, Tratamento 2 -44 novilhos Nelore com peso médio de 454,45 Kg. Analise de desempenho dos animais foi significativa para efeito (P < 0,05), entre as raças de ganho de peso final, ganho de peso médio total, ganho de peso médio diário e rendimento de carcaça. Os animais F1 apresentaram maior ganho de peso médio total com 125 kg e o Nelore com 120 kg, representando um ganho de 5 Kg superior. O ganho de peso médio diário para o cruzamento F1 foi 1,53 kg e o Nelore apresentou 1,28 kg, observando um desempenho de 22,3 % superior do F1 em relação ao Nelore. A análise econômica demonstrou efeito para tratamento (P < 0,05) para os custos operacionais (CO), receita operacional total (ROT), custo de capital (CK), margem bruta, margem liquida, resultado econômico, ponto de equilíbrio, margem liquida por kg de peso vivo. A lucratividade dos animais F1 com 14,74% e uma rentabilidade de 17,59%, enquanto os animais Nelores ficaram com 2,04% de lucratividade inferior e uma rentabilidade 14,86%. Conclui-se que o cruzamento entre animais Nelore e Angus com suplementação obteve maior desempenho de peso e rentabilidade. Palavras chaves: Bovinos, suplementação a pasto, cruzamento industrial, nutriçãoPerformance and economic viability of finishing of steers in pasture supplemented in the Pantanal ABSTRACT. The objective of this study was to evaluate the performance of two genetic groups of F1 steers Angus vs. Nellore and Nellore in pasture supplementation and their economic viability. The experiment was conducted at the São Geraldo farm located in the municipality of Bonito -MS, Brazil. It was used 94 steers, being distributed in randomized blocks, totaling two treatments. Treatment 1 -50 Angus vs. Nellore F1 steers weight 459.32, Treatment 2 -44 Nellore steers with average weight of 454.45 kg. Performance analysis of the animals was significant (P < 0.05), between the genetic groups of final weight gain, total average weight gain, average daily weight gain and carcass dressing. The
Background The objective of this study was to assess the effects of diet on bacterial species in the solid fraction of the ruminal content using the gene sequences of the conserved 16S rDNA region steers fed one of the following diets: canola (C), cottonseed (A), sunflower (G), soybean (SO), corn silage (S) and control diet (PD). Canola, cottonseed, sunflower and soybean were fed as whole seeds. Six crossbred steers (Body weight = 416.33 ± 93.30 kg; mean ± SD), castrated male, and fitted with ruminal cannula were used. The experimental design was a 6 × 6 Latin square design. Results Cellulolytic bacteria were predominant for all diets, with 47.75% of Operational Taxonomic Units (OTU) in animals fed the cottonseed diet. Amylolytic bacteria were identified for all diets, representing 62.51% OTU in animals consuming the sunflower diet. Proteolytic bacteria were identified for all diets, corresponding to 65.96% OUT in animals fed the sunflower diet. Lactic bacteria were identified for all diets. Megasphaera elsdenii bacterium was identified for all diets, with a greater diversity of this bacterium in steers fed the control diet. This bacterium may reduce the availability of hydrogen in the rumen due to propionate production and lactate utilization. Conclusion Oilseed in the diet showed a similarity of bacteria species with 47.5% of changing of the ruminal flora.
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