Navegando por Autor "Silva, Pedro Henrique Ferreira da"

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    Morphological and structural characteristics of Urochloa decumbens Stapf. deferred pasture grazed by heifers under two periods of protein-energy supplementation
    (2019) Silva, Pedro Henrique Ferreira da; Carvalho, Carlos Augusto Brandão de; Malafaia, Pedro; Garcia, Felipe Zumkeller; Barbero, Rondineli Pavezzi; Ferreira, Robson Leandro
    ABSTRACT. The aim of this study was to evaluate the morphological and structural characteristics of deferred Urochloa decumbens Stapf. ‘Basilisk’ grazed by Nellore heifers under two periods of protein and energy supplementation (PES). The experiment was carried out from Jun 21 to Nov 15, 2016, under a completely randomized design and two PES periods (55 [P55] and 147 [P147] days). Forage mass (FM), leaf blade dry mass (LBDM), stem dry mass (SDM), dead material dry mass (DMDM), canopy height (CH), and forage bulk density (FBD) were evaluated. Data were analyzed by the SAS® PROC MIXED procedure and treatment means were compared with the Student's t test (p < 0.05). LBDM was higher for P147 heifers after 21, 84, and 126 days of grazing, similar to those observed after 63 days, and was higher for P55 heifers at 42, 105, and 147 days of grazing. SDM was lower for P147 heifers after 21, 42, 105, and 126 days, and similar in the other grazing periods. Protein and energy supplementation for heifers over 147 days resulted in a lower stem mass of U. decumbens Stapf. ‘Basilisk’ deferred pastures.
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    Morphological and structural characteristics of Urochloa decumbens Stapf. deferred pasture grazed by heifers under two periods of protein-energy supplementation
    (2019) Silva, Pedro Henrique Ferreira da; Carvalho, Carlos Augusto Brandão de; Malafaia, Pedro; Garcia, Felipe Zumkeller; Barbero, Rondineli Pavezzi; Ferreira, Robson Leandro
    ABSTRACT. The aim of this study was to evaluate the morphological and structural characteristics of deferred Urochloa decumbens Stapf. ‘Basilisk’ grazed by Nellore heifers under two periods of protein and energy supplementation (PES). The experiment was carried out from Jun 21 to Nov 15, 2016, under a completely randomized design and two PES periods (55 [P55] and 147 [P147] days). Forage mass (FM), leaf blade dry mass (LBDM), stem dry mass (SDM), dead material dry mass (DMDM), canopy height (CH), and forage bulk density (FBD) were evaluated. Data were analyzed by the SAS® PROC MIXED procedure and treatment means were compared with the Student's t test (p < 0.05). LBDM was higher for P147 heifers after 21, 84, and 126 days of grazing, similar to those observed after 63 days, and was higher for P55 heifers at 42, 105, and 147 days of grazing. SDM was lower for P147 heifers after 21, 42, 105, and 126 days, and similar in the other grazing periods. Protein and energy supplementation for heifers over 147 days resulted in a lower stem mass of U. decumbens Stapf. ‘Basilisk’ deferred pastures.
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    Protein and carbohydrate profiles of 'Massai' grass silage with pelleted citrus pulp and microbial inoculant
    (2022) Anjos, Amanda Nunes Assis dos; Almeida, João Carlos de Carvalho; Viegas, Carlos Renato; Silva, Pedro Henrique Ferreira da; Morais, Leonardo Fiusa de; Nepomuceno, Delci de Deus; Carvalho, Carlos Augusto Brandão de; Soares, Felipe Almeida
    Abstract The objective of this work was to evaluate the effects of the inclusion of pelleted citrus pulp and microbial inoculant on the fermentation characteristics, carbohydrate and protein fractionation, and total digestible nutrient contents of 'Massai' grass (Megathyrsus maximus × Megathyrsus infestus) silage. The experimental design was completely randomized, in a 2×4 factorial arrangement (application or not of inoculant × 0, 10, 20, and 30% citrus pulp) with five replicates. There was an increase in dry matter recovery as affected by citrus pulp levels. The values obtained for pH and ammonia nitrogen indicated an adequate fermentation process. Under increasing citrus pulp levels, there was a reduction in neutral detergent fiber and an increase in nonfibrous carbohydrate contents and in protein linked to fiber. Total digestible nutrient content reaches a peak of 513.1 g kg1 with the inclusion of 12.50% citrus pulp. The microbial inoculant, when isolated, does not influence carbohydrate and protein profiles. Inclusions between 10 and 20% citrus pulp are able to maintain adequate fermentative parameters and improve the digestible nutrient profile, with an adequate dry matter recovery. Resumo O objetivo deste trabalho foi avaliar os efeitos das inclusões de polpa cítrica peletizada e de inoculante microbiano sobre características fermentativas, fracionamento de carboidratos e proteínas, e teores de nutrientes digestíveis totais de silagem de capim 'Massai' (Megathyrsus maximus × Megathyrsus infestus). O delineamento experimental foi inteiramente casualizado, em arranjo fatorial 2×4 (aplicação ou não de inoculante × 0, 10, 20 e 30% de polpa cítrica), com cinco repetições. Houve aumento da recuperação de matéria seca em função dos níveis de polpa cítrica. Os valores obtidos para pH e nitrogênio amoniacal indicaram adequado processo fermentativo. Sob níveis crescentes de polpa cítrica, houve redução dos teores de fibra insolúvel em detergente neutro e aumento do teor de carboidratos não fibrosos e proteína ligada à fibra. O teor de nutrientes digestíveis totais atinge ponto máximo de 513,1 g kg1 com a inclusão de 12,50% de polpa cítrica. O inoculante microbiano, quando isolado, não influencia os perfis de carboidratos e proteínas. Inclusões entre 10 e 20% de polpa cítrica são capazes de manter parâmetros fermentativos adequados e melhorar o perfil de nutrientes digestíveis, com adequada recuperação de matéria seca.
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    Protein and carbohydrate profiles of 'Massai' grass silage with pelleted citrus pulp and microbial inoculant
    (2022) Anjos, Amanda Nunes Assis dos; Almeida, João Carlos de Carvalho; Viegas, Carlos Renato; Silva, Pedro Henrique Ferreira da; Morais, Leonardo Fiusa de; Nepomuceno, Delci de Deus; Carvalho, Carlos Augusto Brandão de; Soares, Felipe Almeida
    Abstract The objective of this work was to evaluate the effects of the inclusion of pelleted citrus pulp and microbial inoculant on the fermentation characteristics, carbohydrate and protein fractionation, and total digestible nutrient contents of 'Massai' grass (Megathyrsus maximus × Megathyrsus infestus) silage. The experimental design was completely randomized, in a 2×4 factorial arrangement (application or not of inoculant × 0, 10, 20, and 30% citrus pulp) with five replicates. There was an increase in dry matter recovery as affected by citrus pulp levels. The values obtained for pH and ammonia nitrogen indicated an adequate fermentation process. Under increasing citrus pulp levels, there was a reduction in neutral detergent fiber and an increase in nonfibrous carbohydrate contents and in protein linked to fiber. Total digestible nutrient content reaches a peak of 513.1 g kg1 with the inclusion of 12.50% citrus pulp. The microbial inoculant, when isolated, does not influence carbohydrate and protein profiles. Inclusions between 10 and 20% citrus pulp are able to maintain adequate fermentative parameters and improve the digestible nutrient profile, with an adequate dry matter recovery. Resumo O objetivo deste trabalho foi avaliar os efeitos das inclusões de polpa cítrica peletizada e de inoculante microbiano sobre características fermentativas, fracionamento de carboidratos e proteínas, e teores de nutrientes digestíveis totais de silagem de capim 'Massai' (Megathyrsus maximus × Megathyrsus infestus). O delineamento experimental foi inteiramente casualizado, em arranjo fatorial 2×4 (aplicação ou não de inoculante × 0, 10, 20 e 30% de polpa cítrica), com cinco repetições. Houve aumento da recuperação de matéria seca em função dos níveis de polpa cítrica. Os valores obtidos para pH e nitrogênio amoniacal indicaram adequado processo fermentativo. Sob níveis crescentes de polpa cítrica, houve redução dos teores de fibra insolúvel em detergente neutro e aumento do teor de carboidratos não fibrosos e proteína ligada à fibra. O teor de nutrientes digestíveis totais atinge ponto máximo de 513,1 g kg1 com a inclusão de 12,50% de polpa cítrica. O inoculante microbiano, quando isolado, não influencia os perfis de carboidratos e proteínas. Inclusões entre 10 e 20% de polpa cítrica são capazes de manter parâmetros fermentativos adequados e melhorar o perfil de nutrientes digestíveis, com adequada recuperação de matéria seca.