Okara or soybean grain added to the rehydrated corn grain silage for cattle: digestibility, degradability and ruminal parameters

Tamara Tais Tres; Clóves Cabreira  Jobim; Tatiana Garcia  Diaz; João Luiz Pratti  Daniel; Fernando Alberto Jacovaci

doi:10.4025/actascianimsci.v42i1.48586

Tamara Tais Tres Universidade Estadual de Maringá http://orcid.org/0000-0002-0366-1344
Clóves Cabreira Jobim Universidade Estadual de Maringá http://orcid.org/0000-0002-1623-1685
Tatiana Garcia Diaz Universidade Estadual de Maringá http://orcid.org/0000-0003-1700-3382
João Luiz Pratti Daniel Universidade Estadual de Maringá http://orcid.org/0000-0003-0569-899X
Fernando Alberto Jacovaci Universidade Estadual de Maringá http://orcid.org/0000-0001-6259-704X

DOI: https://doi.org/10.4025/actascianimsci.v42i1.48586

Palavras-chave: byproduct; fermentation; microbial synthesis; pH; soybean.

Resumo

The experiment was carried out to evaluate total and partial digestibility of nutrients, the efficiency of microbial protein synthesis, in situ degradability and ruminal parameters in cattle fed diets with rehydrated corn grain silages, okara or soybean grain. Three Holstein steers were distributed in a 3 x 3 Latin square design. The treatments evaluated were: SO (corn grain silage + 30% okara), SSG (corn grain silage + 20% soybean grain) and CG (dry corn grains). The ruminal digestibility of non-fiber carbohydrates (NFC) increased in SO (88.34%) and SSG treatments (87.87%), compared to the CG treatment (63.48%). The minimum ruminal pH value was 6.01, observed 4.13 hours after feeding a diet with SO. The highest ammonia-N contents were 15.25 and 15.07 mg dL^-1 observed in SSG and SO, respectively, 2.45 and 2.61 hours after feeding. Treatments SO and SSG showed higher fraction A content (readily degradable fraction) and C (constant rate of degradability of fraction B). The effective degradability (ED) of dry matter (DM) was higher for the diets SO and DE of CP was higher for treatments SO and SSG. SSG and SO result in better utilization of nutrients by animals.

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