Digestibility and biological value of the yeast protein (Saccharomyces spp) and the soybean meal rabbits

Authors

  • Ana Regina Techiatti Fazano Instituto de Zootecnia, Divisão de Zootecnia Diversificada, Seção de Cunicultura, Nova Odessa, SP
  • Cyro Fúlvio Zinsly Universidade de São Paulo, ESALQ, Departamento de Zootecnia, Piracicaba, SP
  • Wilson Roberto Soares Mattos Universidade de São Paulo, ESALQ, Departamento de Zootecnia, Piracicaba, SP
  • Irineu Humberto Packer Universidade de São Paulo, ESALQ, Departamento de Zootecnia, Piracicaba, SP

Keywords:

digestibility and biological value, dried yeast, growing rabbits

Abstract

An experiment was carried out with growing rabbits to determine protein quality of dried yeast through digestibility and biological value compared to soybean meal. The first 18 days of the experimental period (28 days), were utilized as a preliminary phase and the last 10 days for the collections. Twenty California and White New Zealand weaned rabbits of both sexes were utilized as experimental animals with initial mean body weight of 930 g at 40 days of age. The experimental design consisted of 4 treatments according to a factorial scheme envolving 2 protein sources (dried yeast and soybean meal) and 2 crude protein levels (C.P.) (8 and 12%). Each treatment was alloted at random to 5 replicates (one animal per replicate). The mean apparent digestibilíty coeficients of soybean meal were 93,37% and 91.44% for rations containing 8 and 12% C.P., respectively. These means were higher than those observed for dried yeast wich were 85.85% and 87.72%, respectively for the same C.P. levels. The differences between protein biological values in 8 and 12% C.P. levels for soybean meal (51,96% and 56,53%), and for dried yeast (55,37% and 57,17%) respectively, were not statistically differents. Based on the results, of the it can be suggested that part of non protein nitrogen of dried yeast was utilized by cecum microorganisms in protein synthesis.

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Published

2014-01-15

Issue

Section

ANIMAL NUTRITION

How to Cite

Digestibility and biological value of the yeast protein (Saccharomyces spp) and the soybean meal rabbits. (2014). Bulletin of Animal Husbandry, 46(2), 185-191. http://35.198.24.243/index.php/bia/article/view/759

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