Consumo e comportamento ingestivo de cabras em pasto de capim-marandu

Macêdo, Ernando de Oliveira; Oliveira, Maria Elizabete de; Silva, Patrícia Carvalho da; Ribeiro, Aline Mendes; Oliveira, Glauco Lima de; Andrade, A. C.; Rodrigues, Marcônio Martins

doi:10.5433/1679-0359.2015v36n3supl1p2175

Cited by 4 publications

(3 citation statements)

References 6 publications

(11 reference statements)

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“…Conversely, pastures managed at 45 cm pregrazing canopy height had a higher proportion of senescent material and stem mass due to its greater elongation. Likewise, Macedo et al (2015) found a higher proportion of senescent material with increasing canopy heights in Marandu grass, and they associated it with the higher self-shading and stem elongation that intensifies the senescence process of older leaves. As can be observed in Table 3, TDM yield has a negative correlation with the proportion of leaf blades (r = -0.95) but positive with those of stem (r = 0.96) and senescent material (r = 0.95).…”

Section: Resultsmentioning

confidence: 88%

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Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights

Cardoso

Sousa

Ferreira

et al. 2019

SCA

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This study aimed to evaluate the morphogenic, structural, chemical characteristics, and forage yield of Massai grass, as well as the performance of sheep under three pre-grazing canopy heights. Eighteen Dorper x crossbred sheep (12 males and 6 females) were subjected to three pre-grazing canopy heights of Massai grass (45, 35, and 25 cm). Rotational grazing was adopted, with a fixed rest period of 12 days and occupation of four days. Before placing animals in the paddock, stocking rate was estimated to ensure a reduction of about 50% in the initial height. Morphogenic and chemical characteristics of forage were evaluated, as well as animal intake and performance. Pasture managed at 25 cm height induced reductions in stem and sheath sizes, and phyllochron but an increased leaf: stem ratio. However, the pasture cut at 35 cm above ground promoted an increase in total dry mass and foliar leaf productions, in addition to greater forage availability and daily accumulation. Yet, pastures with a height of 45 cm had a higher percentage of stem and senescent material, decreasing leaf intake by animals. Among the studied heights, 35 cm is the most suitable for Massai grass, when used for rearing sheep for meat production under pasture conditions in the northern Tocantins. This is because this management provided a greater availability of good quality forage and thereby increasing weight gains per area in animals.

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Section: Resultsmentioning

confidence: 88%

“…Thus, proper canopy height management is essential to increase FA, without significant losses in quality due to increased stem production. Brâncio et al (2003) found a correlation of r = 0.70 between canopy height and FA in Massai grass, whereas Macedo et al (2015) found a correlation of r = 0.91 for the same factors in Marandu grass.…”

Section: Resultsmentioning

confidence: 97%

Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights

Cardoso

Sousa

Ferreira

et al. 2019

SCA

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“…Animals change the parameters of their ingestive process in an attempt to meet their intake requirements, because variables such as bite mass and forage-intake rate differ according to pasture structure, especially height. Changes in pasture height might affect the time required to grasp and chew the food, which consequently alters intake of forage (MACEDO et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Forage intake processes by goats on a massai grass pasture with different sward heights

Rodrigues

Oliveira

Leal

et al. 2016

SCA

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The objective of this study was to evaluate the forage-intake process of goats feeding on Massai grass pastures with different heights (40, 50, 60, and 70 cm). The experimental design was completely randomized, with treatments corresponding to four sward heights with two replicates over time and space. Collected data were related to the forage-intake process and the chemical and morphological composition of the pasture. Grazing trials (45 min) were performed with four Anglo-Nubian crossbred goats. Total forage mass intake, bite mass, and intake rate were expressed in relation to animal weight. Pasture density, forage mass, and leaf blade increased as forage height increased. The chemical composition of forage at the evaluated heights was similar, except for reduced crude protein content at 70-cm height. Bite rate, intake rate, and time per bite had a quadratic relationship with increasing sward height. The greatest intake rate was observed at 54.7 cm of height, with 0.136 g DM min -1 kg -1 LW. Bite rate exhibited a linear and positive correlation with increase in intake. At the 50-cm height, goats harvested a mass of 3.65 g DM bite -1 kg -1 LW, when they performed 34.5 bites per minute. Adult goats had a greater forage intake on 50-cm high Massai grass pastures because they could obtain a greater bite mass in a shorter time per bite. Key words: Bite mass. Bite rate. Intake rate. Intake. ResumoObjetivou-se avaliar os processos de ingestão de forragem por caprinos em pastagem com capimMassai manejado sob diferentes alturas (40, 50, 60 casualizado. Os tratamentos corresponderam a quatro alturas do dossel com duas repetições no tempo e no espaço. Os dados coletados foram relacionados aos processos de ingestão de forragem e composição química e morfológica do pasto. Foram realizados testes de pastejo de 45 minutos com quatro cabras mestiças da raça Anglonubiana. A massa de forragem total consumida, massa de bocados e a taxa de ingestão foram expressos em relação ao peso dos animais. Com o incremento da altura da forragem houve aumento na densidade do pasto, massa de forragem e lâmina foliar. A composição química da forragem nas alturas avaliadas foi semelhante, com exceção da redução do teor de proteína bruta aos 70 cm. A taxa de bocado, taxa de ingestão e tempo por bocado apresentou relação quadrática com o aumento da altura. A maior taxa de ingestão foi observada aos 54,7 cm de altura, com 0,136 g MS min -1 kg -1 de PC. A massa de bocado apresentou relação linear e positiva com o aumento da altura. Aos 50 cm as cabras colheram uma massa de 3,65 g MS bocado -1 kg -1 PC, quando realizavam 34,5 bocados por minuto. No pasto de capim-massai aos 50 cm ocorre maior consumo de forragem por cabras adultas, pois os animais conseguem obter uma massa maior do bocado em menor tempo por bocado. Palavras-chave: Consumo. Massa do bocado. Taxa de ingestão. Taxa de bocado.

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Characterization of pasture of Andropogon grass and behavior of grazing goats in a silvopastoral system

Zambrano¹,

Edvan²,

Oliveira³

et al. 2021

Agroforest Syst

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Consumo e comportamento ingestivo de cabras em pasto de capim-marandu

Cited by 4 publications

References 6 publications

Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights

Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights

Forage intake processes by goats on a massai grass pasture with different sward heights

Characterization of pasture of Andropogon grass and behavior of grazing goats in a silvopastoral system

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