<b>Performance and digestibility in feedlot lambs fed hay based diets

Abstract

This study aimed to evaluate the performance of feedlot lambs fed diets formulated with hay of different genotypes of Cynodon spp. and to compare the dry matter digestibility of diets using different evaluation methods (total fecal collection and chromium oxide). Suffolk crossbred neutered male lambs (n=30), with an average age of 90 days and average body weight of 21.5 kg ± 1.6. Diets were formulated using a standard concentrate and hay of the following genotypes of Cynodon dactylon: Jiggs, Vaquero, Tifton 68, Coast-Cross, Tifton 85 and Russell, in a 60:40 forage concentrate ratio, composing the treatments distributed in a randomized block design in a factorial 5 x 2 arrangement of 5 diets and 2 digestibility evaluation methods. Animals receiving Vaquero hay showed dry matter intake of 18.3; 16.9; 25.6; 20.7 and 24.2% higher than those fed hay of Jiggs, Tifton 68, Coast Cross, Tifton 85 and Russell, respectively. There was no difference between diets for digestibility using total fecal collection, chromium oxide and final weight of animals. Jiggs hay based diets allowed greater daily weight gain and better feed conversion.

Use of indigestible markers to estimate the apparent dry matter digestibility of diets containing a cocoa by-product

“…However, the results are variable because of several factors, including incomplete mixing with ruminal digesta, faster passage through the rumen than fibrous material, possible accumulation in the digestive tract, variations in fecal excretion throughout the day, and analytical difficulties. However, as in the present study, other authors found that CO produced satisfactory results and presented several advantages, including low cost, ease of administration, and ease of analysis (CABRAL et al, 2008;FERREIRA et al, 2009;SAMPAIO et al, 2011;POZZA et al, 2013;OLIVEIRA et al, 2016).…”

Prevalência De Mastite Em Um Rebanho Bovino No Noroeste Do Paraná E a Susceptibilidade Das Bactérias Isoladas Aos Antimicrobianos

“…Fonte: Adaptado de Oliveira et al (2016). Aboagye et al (2015) avaliando o desempenho produtivo de ovinos alimentados com feno de alfafa aditivados com: controle, enzima fi brolítica, inoculante microbiano produtor de esterase de ácido ferúlico e enzimas fi brolíticas para controlar a ingestão da dieta, verifi caram que não houve efeito das enzimas sobre o consumo, digestibilidade e desempenho animal.…”

Qualidade Do Leite: Um Estudo De Caso Sobre Um Laticínio E Seus Produtores

“…Fonte: Adaptado de Oliveira et al (2016). Aboagye et al (2015) avaliando o desempenho produtivo de ovinos alimentados com feno de alfafa aditivados com: controle, enzima fi brolítica, inoculante microbiano produtor de esterase de ácido ferúlico e enzimas fi brolíticas para controlar a ingestão da dieta, verifi caram que não houve efeito das enzimas sobre o consumo, digestibilidade e desempenho animal.…”