Suplementos para terminação de ovinos em pastos de Brachiaria brizantha cv. Marandu

Carvalho, Daniel Marino Guedes de; Cabral, Luciano da Silva; Silva, Janaina Januário da; Abreu, Joadil Gonçalves de; Galati, Rosemary Laís; Gentile, Gessy Gabriela de Paula; Camargo, Lázaro Manoel de; Soares, Juliane Quenoizoré; Rufino, João Paulo Ferreira

doi:10.5433/1679-0359.2015v36n1p313

Cited by 9 publications

(10 citation statements)

References 8 publications

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“…These results are associated with different performances of the animals and price of the supplied feed (CARVALHO et al, 2015). The treatment without addition of PAM had the lowest amount of 0.31 per animal and replacing 30% of PAM in the diet had the highest economic return ($ 4.14 per animal).…”

Section: Resultsmentioning

confidence: 91%

Aerial parts of cassava as partial replacement for feed concentrates in the diet of lambs raised in semi-confinement

Pereira

Ítavo

Mateus

et al. 2017

SCA

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This study aimed to evaluate the performance and economic viability of including the aerial parts of cassava (PAM) in the feed of semi-confined lambs for partial reduction of food concentrates. Fifty-six sheep, including males and females of the Pantaneira genetic group weighing 18.84 ± 2.02 kg on an average were used. The experiment was conducted in a factorial randomized complete block design with four treatments, each with seven females and seven males. Each group of 14 animals received one of four treatments: control, 10% of food concentrate in diet replaced with PAM, 20% replaced with PAM, and 30% replaced with PAM. The average total gain in weight (GWT) of the male lambs was 26.89% higher than the gains observed in females. Based on the cost analysis, we observed a linear effect (P < 0.01), i.e., a decrease in the feed cost for male and female groups with increase in PAM content. For the study period, the expenditure for the control male group was the highest at $ 17.60 per animal. Expenditure for the PAM 30 male group was the lowest at $ 12.74 per animal. These figures reflect the actual operating costs (COE), i.e., the power is 75.78% and 74.77%, for male and female groups respectively. The total cost, decreased linearly (P < 0.05) with PAM 30 treatment costing the least at $ 47.90, which was $ 7.02 lower than the control. When assessing the net margin per kilogram among the female groups, we observed a quadratic effect (P < 0.01) with a maximum gain of 23.98% when adding PAM and $ 0.50 kg -1 . Our results show that the raising of lambs in semi-confinement was economically viable, and the addition of the aerial part of processed cassava in the feed presented a higher economic return. Further, the addition of aerial parts of cassava did not affect the performance of the lambs. ResumoObjetivou-se avaliar o desempenho produtivo e viabilidade econômica da inclusão da parte aérea de mandioca in natura na ração de cordeiros semi-confinados, em busca da redução parcial de alimentos concentrados. Foram utilizados 56 ovinos da raça Pantaneira, sendo 28 machos e 28 fêmeas, com idade média de 75 dias, pesos médios de 18,84kg ± 2,02, avaliados durante os meses de janeiro a março de 2015, totalizando 65 dias. O delineamento experimental foi em blocos inteiramente casualizados com quatro tratamentos, cada um com 7 fêmeas e 7 machos, sendo que foram divididos de forma que os pesos e os animais fossem o mais homogêneos. Cada grupo de 14 animais recebeu um dos quatro tratamentos: Controle; tratamento com adição de 10% PAM em substituição ao concentrado; tratamento com adição de 20% de PAM em substituição ao concentrado e tratamento com adição de 30% de PAM em substituição ao concentrado. O valor de ganho médio total (GPT) dos cordeiros machos foi 26,89% superior aos ganhos observados no grupamento de fêmeas. Com base no centro de custos foi observado efeito linear (P < 0,01) decrescente no valor da alimentação para os grupamentos de macho e fêmea. Sendo o tratamento controle o maior dispêndio no período com R$ 5...

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Section: Resultsmentioning

confidence: 91%

Aerial parts of cassava as partial replacement for feed concentrates in the diet of lambs raised in semi-confinement

Pereira

Ítavo

Mateus

et al. 2017

SCA

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“…This variable indicates a greater proportion of leaves in forage canopy. Carvalho et al (2015) stated that a greater amount of leaves reflects in a highly selective and preferential consumption by sheep, which select leaves rather than stems for being more nutritious and suitable to their needs. Figure 1 displays the proportions of leaf blades, stem, and senescent material in plants of the three pre-grazing height treatments.…”

Section: Resultsmentioning

confidence: 99%

“…Pre Animal consumption has a positive correlation with forage availability (CARVALHO et al, 2015;GONTIJO NETO et al, 2006), therefore, forage supply may impair selective consumption and prehension. The forage availability and supply were significantly lower in pastures managed at 25 cm pre-grazing height, which can be attributed to the lower consumption of animals.…”

Section: Dm Intakementioning

confidence: 99%

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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“…However, this value is considered not to limit the activity of rumen microorganisms, and this activity is suitable only to keep animals, which may compromise the digestibility of highly fibrous forage (CARVALHO et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Anti-nutritional potential of protodioscin and kinetics of degradation in Urochloa grasses

Leal

Ítavo

Valle³

et al. 2016

SCA

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This study aimed to evaluate the nutritional value of Urochloa exotic grasses to quantify aspects of antiquality and to identify their correlation with quality grasses. We evaluated the grasses U. humidicola cv. Comum, U. humidicola cv. BRS Tupi, U. decumbens cv. Basilisk, D70 U. decumbens and U. ruziziensis ecotype R124, and we grouped them into summer, autumn, winter and spring. We determined the chemical composition, in vitro digestibility, levels of protodioscin and cumulative gas production from the leaves of grass materials in nature. Basilisk and D70 showed higher content protodioscin in all seasons, with the highest values (31.4 and 27.4 g kg -1 , respectively) in spring. D70 had a crude protein content of 140.0 g kg -1 in summer and a better in vitro digestibility of dry matter (888.7 g kg -1 ). R124 had a higher cumulative gas production in the spring (16.44 mL gas 100 mg DM -1 ). U. humidicola (Comum and BRS Tupi) presented lower protodioscin concentrations (1.22 and 1.07 g kg DM -1 , respectively), and U. decumbens (Basilisk and D70) presented higher concentrations (27.25 and 24.55 g kg DM -1 , respectively). The presence of protodioscin interfered with in vitro digestibility results and cumulative gas production in vitro. Key words: Fodder. Gas production. In vitro digestibility. ResumoObjetivou-se avaliar o valor nutricional e quantificar os aspectos de anti-qualidade e suas correlações com a qualidade de gramíneas exóticas do gênero Urochloa. Foram avaliadas as gramíneas Urochloa. humidicola cv. Comum, Urochloa humidicola cv. BRS Tupi, Urochloa decumbens cv. Basilisk, Urochloa decumbens ecotipo D70 e Urochloa ruziziensis ecotipo R124 e agrupadas em épocas verão, 1 Projeto financiado pelo CNPq, (processo n° 563988/2010-0) e pela FUNDECT (processo 23/200.145/2011).

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Suplementos para terminação de ovinos em pastos de Brachiaria brizantha cv. Marandu

Cited by 9 publications

References 8 publications

Aerial parts of cassava as partial replacement for feed concentrates in the diet of lambs raised in semi-confinement

Aerial parts of cassava as partial replacement for feed concentrates in the diet of lambs raised in semi-confinement

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

Anti-nutritional potential of protodioscin and kinetics of degradation in Urochloa grasses

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