Substituição parcial do farelo de soja por ureia ou amireia na alimentação de cabras em lactação

Mendes, Clayton Quirino; Fernandes, Raquel Helena Rocha; Susin, Ivanete; Pires, Alexandre Vaz; Gentil, Renato Shinkai

doi:10.1590/s1516-35982010000800026

Cited by 16 publications

(12 citation statements)

References 19 publications

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“…However, Mendes et al (2010) partially replaced soybean meal by urea or starea in diets with 40% corn silage of lactating (110 days) Saanen and Pardo Alpina goats (primiparous and multiparous) and reported 2.24 kg DMI/day (3.40% BW); the values were similar to the observed in this study. These variations may be related to body weight, productive stage and diet composition.…”

Section: Resultssupporting

confidence: 85%

“…Rodrigues et al (2007) reported values from 1.18 to 1.34 of feed efficiency for Alpine goats (60 days of lactation) fed diets with the same amount of energy but different levels of protein. However, Lima (2010) reported values from 0.89 to 1.45 of milk yield efficiency for Saanen goats from 60 days of lactation and Mendes et al (2010) observed 1.15 of feed efficiency for goats with 110 days in milk. Thus, milk yield efficiency may be related to the productive potential and the intake capacity of each animal.…”

Section: Resultsmentioning

confidence: 99%

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Performance of lactating goats fed diets containing inactive dry yeast

et al. 2012

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-Twenty-four Saanen goats (15 multiparous and 9 primiparous) from 21 days prepartum to 200 days in lactation were used to evaluate milk yield and composition. Animals were randomly distributed in a 3 × 2 factorial arrangement (3 diets × 2 parity orders) and fed a 40:60 forage:concentrate diet composed of soybean meal, soybean meal + dry yeast or dry yeast as protein source, plus ground corn, mineral supplement and corn silage. The protein source did not influence the body weight of pre and postpartum goats. Prepartum, postpartum and postpeak dry matter intake (DMI) were not altered by diets. However, goats fed the diet containing dry yeast as protein source had lower DMI in late lactation. Milk yield and feed efficiency were not affected by diets. Milk components, acidity and somatic cell count were not influenced by diets during all lactation phases. However, fat and total solid contents postpartum were higher for primiparous goats and somatic cell count postpeak was lower for multiparous goats. Dry yeast can be used to replace soybean meal in diets for lactating Saanen goats.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Performance of lactating goats fed diets containing inactive dry yeast

et al. 2012

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“…Fonseca et al (2008) observed a mean value of 25.73 mg/dL for Alpine goats fed diets containing different protein levels (115 g/kg to 175 g/kg). Mendes et al (2010) evaluated the replacement of soybean meal by urea or starch-urea in the diets for Saanen-Alpine goats and observed N-urea values ranging from 24.42 to 34.92 mg/dL.…”

Section: Discussionmentioning

confidence: 99%

Nutritive value of diets containing inactive dry yeast for lactating Saanen goats

et al. 2014

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-Twenty-four Saanen goats, 15 multiparous and nine primiparous, were distributed in a completely randomised design in a factorial arrangement (3 diets × 2 parities). The treatments were soybean meal (SB), soybean + dry yeast (SBDY), or dry yeast (DY) as a protein source in the diet, and ground corn, mineral supplement, and corn silage (400 g/kg). The study was conducted to evaluate the nutritive value of diets containing inactive dry yeast as a protein source postpartum, postpeak, and during late lactation in dairy goats. To estimate the faecal excretion of indigestible material, neutral detergent fibre was used as an internal marker. The diets did not affect dry matter intake (DMI). However, DMI and nutrient intake were higher for multiparous goats compared with primiparous goats. The digestibility of dry matter and total digestible nutrients (TDN) were higher for primiparous goats in the postpartum period. In the postpeak and late lactation periods, there were no differences in digestibility of DM and nutrient between parities. The TDN was similar in the diets in the postpeak period and at lactation end. The goats fed the DY diet had lower urea nitrogen in blood. The use of inactive dry yeast to substitute soybean meal in diets for primiparous and multiparous lactating Saanen goats is a good alternative for maintaining the nutritional value of diets.

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“…In relation to composition, this absence of significance can be explained by the correct balance of the fibrous and non-fibrous carbohydrates, as well as by the adequate levels of CP, since these are the main responsible for the nutritional factors which modify such contents (FREDEEN, 1996). According to Mendes et al (2010), the absence of alteration in the milk protein content indicates that there was no limitation in the metabolizable protein by providing diets containing source of non-protein nitrogen.…”

Section: Resultsmentioning

confidence: 99%

Production and quality of Alpine goat milk by using urea in place of soybean meal

et al. 2014

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The study was conducted to evaluate the effect of partial substitution of soybean meal by urea in the ration of alpine milking does on the physico-chemical composition, fatty acid profile, and sensory characteristics of the milk. Ten multiparous alpine goats, distributed in a 5X5 Latin square and five levels of urea (0.0; 0.5; 1.0; 1.5 e 2.0%) were used in five experimental periods of 17 days each -12 days for adaptation and 5 days for data collection. There was no effect on the density index (g/cm 3 ), acidity (˚D), protein (%), total dry extract (%), dry defatted extract (%), ashes (%) and sensory characteristics (odor and flavor). Substitution of soybean meal by urea increased the concentration of milk fat and short chain fatty acids. However, sensory characteristics of the milk were not altered and acceptable by the taste panel. Key words: Dairy goats, chemical composition, non-protein nitrogen, milk production ResumoO objetivo do trabalho foi avaliar o efeito da substituição parcial do farelo de soja por uréia na alimentação sobre a composição físico-química, perfil lipídico e características sensoriais do leite de cabras alpinas. Foram utilizadas 10 cabras alpinas multíparas, distribuídas em quadrado latino (5X5), cinco níveis de uréia (0,0; 0,5; 1,0; 1,5 e 2,0%) e em cinco períodos experimentais, de 17 dias, sendo 12 de adaptação e 5 para coleta de dados. Não houve efeito para índice de densidade (g/cm 3 ), teor de acidez (˚D), proteína (%), extrato seco total (%), extrato seco desengordurado (%), cinzas (%) e características sensoriais (odor e flavor). A substituição do farelo de soja por uréia promoveu um incremento na concentração de gordura, bem como no teor de ácidos graxos de cadeia curta, sem, contudo, alterar as características sensoriais do leite. Palavras-chave: Cabra leiteira, composição química, nitrogênio não protéico, produção de leite

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Substituição parcial do farelo de soja por ureia ou amireia na alimentação de cabras em lactação

Cited by 16 publications

References 19 publications

Performance of lactating goats fed diets containing inactive dry yeast

Performance of lactating goats fed diets containing inactive dry yeast

Nutritive value of diets containing inactive dry yeast for lactating Saanen goats

Production and quality of Alpine goat milk by using urea in place of soybean meal

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