Effects of sodium lasalocid and roughage/concentrate ratio on in situ degradability of soybean meal and Coast Cross hay [Cynodon dactylon (L.) Pers.] in dry cows

  • Paulo Henrique Mazza Rodrigues Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção Animal, São Paulo, SP
  • Carlos de Sousa Lucci Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção Animal, São Paulo, SP
  • Laércio Melotti Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção Animal, São Paulo, SP
Keywords: Ionophores, In situ degradability, Soybean Meal, Hay, Ruminants

Abstract

Sodium lasalocid and different roughage:concentrates ratios were studied in a 4 x 4 change over design, with four canulated heifers, weighing 500 kg of average body weight. Treatments were applied in a 2 x 2 factorial arrangement with 40% or 70% of roughage (39% or 59% NDF in the diet) and zero or 200 mg of lasalocid/animal/day. Twenty-one days subperiods were used, the first sixteen for diets adaptation, constituted by Coast Cross hay and concentrate mixture. In situ degradability assay was runned from day seventeen to twenty-one. Statistical interaction between roughage:concentrate ratio and lasalocid was detected over hay NDF and ADF contents (p < 0.05): without lasalocid, less roughage in the diet decreased NDF and ADF degradabilities 12.0% and 12.7% respectively, but with lasalocid the decreasing rates were 7.0% and 4.9%. There were no differences among treatments for protein degradability of soybean meal.

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Published
2000-01-01
How to Cite
Rodrigues, P. H., Lucci, C. de, & Melotti, L. (2000). Effects of sodium lasalocid and roughage/concentrate ratio on in situ degradability of soybean meal and Coast Cross hay [Cynodon dactylon (L.) Pers.] in dry cows. Brazilian Journal of Veterinary Research and Animal Science, 37(3), 259-264. https://doi.org/10.1590/S1413-95962000000300015
Section
ZOOTECHNICS