Abstract:ABSTRACT. This study aimed to evaluate the performance, efficiency and economic viability of different supplements for dairy heifers on Brachiaria decumbens pasture. Twelve heifers with 186 ± 30.5 kg average weight were divided in three groups of four animals. The treatments were mineral salt ad libitum; 0.4 kg animal multiple supplement. The experimental design was randomized blocks, with the contrasts considered significant at 5% probability. There was greater (p < 0.05) body weight and higher daily weight g… Show more
“…Because of concentrate contain 1.5% urea, that led to increasing blood urea without NCG with increasing concentrate intake. Gradual adaptation must be achieved to a non-protein nitrogen and urea supplementation does not exceed 1-2% of total dry matter in the diet [23]. Mahdi [16] referred to increase blood urea when fed 1% urea with 4% concentrate, while GOT and GPT didn't affect.…”
This study was conducted to evaluate the effect of three levels of concentrate 2%, 3%, 4% with or without N-carbamylglutamate (NCG) on rumen bacteria and fermentation characteristics in Shami goats. Twenty-four male goats aged 8-10 months with initial weight 32,685 ± 1.52kg divided into six treatments in a 2×3 factorial experiment/ Completely Randomized Design. Individual feeding was used for 70 days. Rumen fluid was sampled at 0, 3, 6h after feeding while jugular blood was sampled after 70 days before morning feeding. Results showed decreasing (P<0.01) of rumen pH and increasing volatile fatty acids (P<0.01) after 3h and 6h of feeding for 3% level of concentrate with NCG. Rumen ammonia increased (P<0.01) after 3h of feeding with NCG. Total rumen bacteria increased insignificantly with superiority 3% level of feeding without NCG and 4% concentrate with NCG. A linear decrease (P<0.01) of blood urea with increasing feeding level with NCG and GPT decreased (P<0.05) with 3% concentrate. In conclusion, it is preferred to feed 3% concentrate and use NCG as additive with urea.
“…Because of concentrate contain 1.5% urea, that led to increasing blood urea without NCG with increasing concentrate intake. Gradual adaptation must be achieved to a non-protein nitrogen and urea supplementation does not exceed 1-2% of total dry matter in the diet [23]. Mahdi [16] referred to increase blood urea when fed 1% urea with 4% concentrate, while GOT and GPT didn't affect.…”
This study was conducted to evaluate the effect of three levels of concentrate 2%, 3%, 4% with or without N-carbamylglutamate (NCG) on rumen bacteria and fermentation characteristics in Shami goats. Twenty-four male goats aged 8-10 months with initial weight 32,685 ± 1.52kg divided into six treatments in a 2×3 factorial experiment/ Completely Randomized Design. Individual feeding was used for 70 days. Rumen fluid was sampled at 0, 3, 6h after feeding while jugular blood was sampled after 70 days before morning feeding. Results showed decreasing (P<0.01) of rumen pH and increasing volatile fatty acids (P<0.01) after 3h and 6h of feeding for 3% level of concentrate with NCG. Rumen ammonia increased (P<0.01) after 3h of feeding with NCG. Total rumen bacteria increased insignificantly with superiority 3% level of feeding without NCG and 4% concentrate with NCG. A linear decrease (P<0.01) of blood urea with increasing feeding level with NCG and GPT decreased (P<0.05) with 3% concentrate. In conclusion, it is preferred to feed 3% concentrate and use NCG as additive with urea.
“…Ho et al (2021) reportam lucro de U$ 0,45 vaca -1 dia -1 ao aumentar a oferta de forragem. Santos et al (2017) e Benito et al (2019, testando diferentes suplementações para novilhas leiteiras observaram que maiores quantidades de suplemento e suplementação com maior custo, apresentaram menor eficiência e vantagem econômica.…”
Objetivou-se determinar se há viabilidade econômica em incluir silagem de raiz de mandioca (SEM) no suplemento alimentar de vacas leiteiras. Foram utilizadas 10 vacas primíparas da raça Girolando distribuídas em dois quadrados latinos 5 × 5 simultâneos. Cinco tratamentos foram avaliados: I – vacas em pastejo sem suplementação concentrada (SSC); II - vacas em pastejo recebendo 5 kg de suplemento concentrado com 0% de SRM; III - vacas em pastejo recebendo 5 kg de suplemento concentrado com 26% de SRM; IV - vacas em pastejo recebendo 5 kg de suplemento concentrado com 52% de SRM e V - vacas em pastejo recebendo 5 kg de suplemento concentrado com 78% de SRM. Foram analisados o custo dos ingredientes no suplemento, o custo por ingrediente consumido por vaca por dia, o custo da produção de leite gerada apenas pela suplementação concentrada, o lucro da produção de leite gerado pela suplementação e os custos, margens, índices e lucros da produção de leite. O custo da suplementação elevou-se linearmente à medida que se incluiu SRM no suplemento. O maior nível de inclusão da SRM aumentou em 30,69% o custo do suplemento. O custo do kg de leite produzido a mais pela suplementação concentrada (Produção Marginal) aumentou linearmente com a inclusão da SRM no suplemento (P<0,05). A lucratividade da suplementação reduziu linearmente com o aumento da inclusão de SRM (P<0,05). O índice de rentabilidade da suplementação reduziu em 61% a medida que se incluiu o nível máximo de SRM no suplemento. O aumento da inclusão de SRM no suplemento, até a substituição total do milho, não elevou a produção de leite. A inclusão da SRM no suplemento não prejudica a produção de leite e seus aspectos qualitativos, porém eleva o custo do kg do suplemento, reduzindo a viabilidade.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.