Diferentes ofertas de forragem e a produção de leite em vacas mestiças Holandês x Gir

Batistel, Fernanda; Souza, Jonas de; Ticiani, Elvis Curso de Zootecnia; Baldin, M.; Dresch, R.; Fernandes, D.; Oliveira, D.A

doi:10.1590/s0103-84782012005000012

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…The proportion of stems in the 10 and 15 kg DM 100 -1 BW forage treatments were higher than in the 5 kg DM 100 -1 BW forage treatment (Table 2). Similarly, Batistel et al (2012) found a reduction in the proportion of leaves and an increase in the proportion of stems when they increased the forage allowance in their study from 10 to 15 kg DM 100 -1 BW. An important variable is the dead material proportion; through increasing the herbage allowance, the dead material proportion is also increased.…”

Section: Pv Pmmentioning

confidence: 69%

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Dias

Gomes

Ítavo

et al. 2016

SCA

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This study aimed to evaluate the effect of three herbage allowances (5, 10, and 15 kg dry matter [DM] 100 -1 of body weight [BW]) for Brachiaria brizantha cv. Marandu pastures in a continuous grazing system on the morphological and nutritional characteristics of forage, animal performance, and economic viability in Nellore heifers. The total experimental area was 60 ha, divided into 12 paddocks of 5 ha each, with 4 paddocks per treatment. The experimental animals were Nellore heifers (260 in total), with average BW of 301.16 ± 9.12 kg, receiving 0.4 % BW in multiple supplements. We evaluated the production, structural characteristics, and nutritional value of the forage, productive performance, carcass characteristics, and economic viability of each allowance. There were significant effects for the production, structural characteristics, and nutritional value of the forage treatment. The proportions of leaves were 42.40, 38.20, and 30.88 % and the leaf:stem ratios were 1.22, 1.03, and 0.83 for the 5, 10, and 15 kg DM 100 -1 BW herbage allowances, respectively. The average daily weight gain (mean 0.42, 0.75, and 0.63 kg daily -1 ) and stocking rate (3.35, 1.87, and 1.26 animal unit ha -1 ) had a significant effect for the 5, 10, and 15 kg DM 100 -1 BW forage allowance, respectively. The herbage allowances were evaluated as being economically viable with a profit margin of 10.37, 23.65, and 14.43 % for the 5, 10, and 15 kg DM 100 -1 BW allowances, respectively. The greatest pasture response was found in the 5 kg DM 100 -1 BW allowance and was related to better nutritional values and morphological characteristics of the pasture and greater stoking rate and weight gain per area. The herbage allowance of 10 kg DM 100 -1 BW be applied to obtain higher animal performance and better economic viability of heifers in B. brizantha cv. Marandu pastures in a continuous grazing method that are receiving protein-energy supplementation.

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Section: Pv Pmmentioning

confidence: 69%

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Dias

Gomes

Ítavo

et al. 2016

SCA

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Green leaf allowance and dairy ewe performance grazing on tropical pasture1

Souza

Batistel

Ticiani

et al. 2014

Journal of Animal Science

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The objective of this study was to explain the influence of green leaf allowance levels on the performance of dairy ewes grazing a tropical grass. Seventy-two lactating ewes grazed Aruana guineagrass (Panicum maximum Jacq. cv. Aruana) for 80 d. The treatments were 4 daily levels of green leaf allowance (GLA) on a DM basis corresponding to 4, 7, 10, and 13 kg DM/100 kg BW, which were named low, medium-low, medium-high, and high level, respectively. The experimental design was completely randomized with 3 replications. During the experimental period, 4 grazing cycles were evaluated in a rotational stocking grazing method (4 d of grazing and 16 d of rest). There was a linear effect of GLA on forage mass, and increasing GLA resulted in increased total leaf mass, reaching an asymptotic plateau around the medium-high GLA level. The stem mass increased with increased GLA, and a pronounced increase was observed between medium-high and high GLAs. Increasing GLA increased both forage disappearance rate and postgrazing forage mass. Leaf proportion increased with GLA, peaking at the medium-high level, and the opposite occurred for stem proportions, which reduced until medium-high GLA level, followed by an increase on high GLA. Forage CP decreased linearly with GLA, and increasing GLA from low to high reduced CP content by 31%. On the other hand, NDF increased 14% and ADF increased 26%, both linearly in response to greater GLA levels. Total digestible nutrients decreased linearly by 8% when GLA increased from low to high level. Milk yield increased, peaking at medium-high GLA (1.75 kg ewe(-1) d(-1)) and decreased at high GLA level (1.40 kg ewe(-1) d(-1)). Milk composition was not affected by the GLA levels. There was a reduction in stocking rate from 72 to 43 ewes/ha when GLA increased from low to high level. Productivity (milk yield kg ha(-1) d(-1)) increased as GLA increased, peaking at medium-low level (115 kg ha(-1) d(-1)). Although this tropical grass showed the same pattern in responses to GLA levels as reported in the literature with temperate pastures, the magnitude of the process changed and the maximum response in milk yield from lactating dairy ewes grazing a tropical pasture would be achieved with higher forage allowances than in temperate pastures. Overall, Aruana guineagrass grazed by lactating dairy ewes should be managed to provide 7 to 10 GLA in kg DM/100 kg BW according to the production goals.

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Diferentes ofertas de forragem e a produção de leite em vacas mestiças Holandês x Gir

Abstract: Diferentes ofertas de forragem e a produção de leite em vacas mestiças Holandês x Gir

Cited by 2 publications

References 11 publications

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Green leaf allowance and dairy ewe performance grazing on tropical pasture1

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