Performance of lactating goats fed diets containing inactive dry yeast

Revista Brasileira de Zootecnia

Ludmila Couto Gomes²  Claudete Regina Alcalde²  Francisco De Assis Fonseca De Macedo²  Geraldo Tadeu Dos Santos²  Altair Antônio Valloto¹  Luciano Soares De Lima²  Bruna Susan De Labio Molina² 

[1] ,IUniversidade Estadual de Maringá

关键词: feed additive;    lactation;    parity;    Saccharomyces cerevisiae;   

DOI  :  10.1590/S1516-35982012001000016

来源: SciELO

【 摘 要 】

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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