Seletividade aparente de bovinos em pastos de capim-braquiária sob períodos de diferimento

Santos, Manoel Eduardo Rozalino; Fonseca, Dilermando Miranda da; Sousa, Diogo Olímpio Chaves de

doi:10.1590/1678-4162-8725

Cited by 11 publications

(8 citation statements)

References 9 publications

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“…Moderate shading in the silvopastoral system does not interfere with the pasture carrying capacity, nutritional value, dry matter intake, or animal performance compared to the monoculture system (26) . Therefore, variations in CP, NDF, and ADF contents found in this study are more closely related to the stockpiling period and the dry season (27) .…”

Section: Resultsmentioning

confidence: 91%

Marandu grass under deferment in monoculture and silvopastoral system: chemical and mineral composition

Lages,

Santos,

Souza

et al. 2024

Ciênc. anim. bras.

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This study aimed to evaluate the chemical and mineral characteristics of Marandu grass under stockpiling in monoculture (MC) and a silvopastoral system (SPS) with 12- (SPS12) and 18-m (SPS18) spacing between tree rows. The experimental design consisted of randomized blocks, in which each system was allocated individually. Each treatment was formed in the center of each plot in a 3 × 4 factorial arrangement consisting of three systems (MC and SPS12 and SPS18 between the tree rows) and four stockpiling periods (60, 90, 120, and 150 days), totaling 12 treatments with three replications. No interaction effect was observed between the factors (p>0.05) for crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), phosphorus (P), potassium (K), calcium (Ca), or magnesium (Mg). The CP content decreased with increasing stockpiling days but met the suggested requirement for ruminants up to 75 days. The NDF and ADF concentrations increased, while P and K contents decreased with increasing stockpiling days. Magnesium and Ca concentrations did not differ with stockpiling days. However, a difference was observed only for Mg relative to the evaluated systems, which was higher in MC and SPS12, differing from SPS18. The spacing adopted in the SPS of 12 and 18 m does not negatively influence the nutritional value of the forage plant. The 75-day stockpiling period from March favored the concentration of macronutrients and CP content in Marandu grass in both MC and SPS.

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Section: Resultsmentioning

confidence: 91%

Marandu grass under deferment in monoculture and silvopastoral system: chemical and mineral composition

Lages,

Santos,

Souza

et al. 2024

Ciênc. anim. bras.

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“…In fact, in 2018, the LL in the middle was similar to the end of the grazing period, while in 2019, the intermediate period of grazing presented higher LL values compared to the final period but lower than those at the beginning of grazing. As for live and dead leaves in the canopy, components preferred by animals and with better nutritional value compared to the stem (M. E. R. Santos et al, 2016) had similar values at the beginning of the grazing period among the SL treatments. Therefore, the structure of stockpiled pastures was determined by the stem and how it was distributed in the vertical profile of the canopy.…”

Section: Resultsmentioning

confidence: 92%

“…While the morphological characteristics of forage originated from samples collected close to the ground (total forage mass), the nutritional value variables originated from samples collected via simulated grazing. In this context, M. E. R. Santos et al (2016) evaluated the selectivity of cattle under grazing stockpiled signalgrass (Brachiaria decumbens cv. Basilisk) with different stockpiling periods (73, 103, 131 and 163 days).…”

Section: The Percentage Of Dead Leaves (Dls) Was Influenced By the In...mentioning

confidence: 99%

A estratégia de rebaixamento do pasto antes do diferimento modifica a eficiência de pastejo de ovinos no inverno

Silva,

Rocha,

Reis

et al. 2024

Sem. Ci. Agr.

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O objetivo foi avaliar o efeito de estratégias de rebaixamento (ER) do pasto de Urochloa brizantha cv. Marandu (capim-marandu) antes do diferimento sobre a estrutura do pasto diferido e o desempenho de ovinos no inverno. As três ER avaliadas foram: 1) manutenção do capim com 15 cm durante cinco meses antes do início do diferimento (15 cm); 2) manutenção do capim-marandu com 25 cm durante cinco meses antes do início do diferimento, quando o pasto foi rebaixado para 15 cm (25/15 cm); e 3) manutenção do capim com 35 cm, durante cinco meses antes do início do diferimento, quando o pasto foi rebaixado para 18 cm (35/18 cm). Foram utilizadas 18 ovelhas adultas mestiças (Dorper x Santa Inês), alocadas em pares em nove piquetes. As avaliações nos animais e nos pastos foram realizadas a cada 45 dias durante o período de utilização dos pastos diferidos, com mensurações no início (primeira semana), meio (45º dia) e final (90º dia) do período de pastejo. Foram mensurados o GMD, consumo e a composição química de amostras de forragem colhidas por pastejo simulado. O experimento foi conduzido em delineamento inteiramente casualizado com medidas repetidas no tempo. Os pastos mantidos a 15 cm apresentaram maior percentagem de colmo vivo e menor de colmo morto (P<0,10). A massa de forragem, a percentagem de folha viva, o consumo e a digestibilidade dos nutrientes pelos ovinos não foram afetados pelas ER (P>0,10). Entretanto, o consumo de matéria seca (MS), proteína bruta (PB) e a digestibilidade da FDN foram menores no meio em comparação ao início e final do período de pastejo (P<0,10). O tempo em pastejo foi menor e a eficiência de pastejo dos ovinos foi maior no pasto 35/18 cm do que nos 15 e 25/15 cm (P<0,10). O desempenho animal não foi influenciado pelas ER (P>0,10), mas diminuiu do início para o final do período de pastejo. O rebaixamento abrupto do capim-marandu de 35 para 18 cm antes do diferimento resultou em maior eficiência de pastejo pelos ovinos, caracterizando ambiente pastoril adequado para o pastejo no inverno.

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“…The apparent selectivity index (ASI) done by the animals in relation to the morphological components of the pasture was calculated according to Santos et al (2016).…”

Section: Methodsmentioning

confidence: 99%

Sheep production during the rainy season in marandu palisadegrass swards previously utilized under deferred grazing

Sousa

Santos

Fonseca

et al. 2018

Arq. Bras. Med. Vet. Zootec.

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The objective of this study was to evaluate the effects of Brachiaria brizantha cv. Marandu syn. Urochloa brizantha cv. Marandu (Marandu palisadegrass) in late winter on pasture structure, apparent selectivity, and sheep production during spring and early summer. The conditions of deferred pastures at the end of winter were: low (15.1cm and 4600kg/ha of DM), medium (23.2cm and 5940kg/ha of DM), high (31.4cm and 7640kg/ha of DM) and high/mowed (31.3cm and 7200kg/ha of DM, mowed to 8cm). The experiment was conducted in split plot design (sward conditions at the end of winter: low, medium, tall and tall/lowered) during time (early, middle and late spring/summer) and completely randomized design with three replications. The percentages of live leaf laminae in available forage and in simulated grazing samples were higher in tall/lowered sward and lower in high sward, oppositely to percentage of dead tissue. Only at the beginning of the grazing period the high/lowered sward had lower forage mass and bulk density. This remained high in high sward during all the grazing period. The sheep performance and the animal production per area were higher in low sward and lower in tall swards. The low sward has better structure and higher sheep production starting at spring. The lower of the marandu palisade grass at late winter improves this structure and increases sheep production during spring and early summer.

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Seletividade aparente de bovinos em pastos de capim-braquiária sob períodos de diferimento

Cited by 11 publications

References 9 publications

Marandu grass under deferment in monoculture and silvopastoral system: chemical and mineral composition

Marandu grass under deferment in monoculture and silvopastoral system: chemical and mineral composition

A estratégia de rebaixamento do pasto antes do diferimento modifica a eficiência de pastejo de ovinos no inverno

Sheep production during the rainy season in marandu palisadegrass swards previously utilized under deferred grazing

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