Resposta produtiva de novilhos de diferentes genótipos e idade ao desmame quando alimentados por subprodutos da indústria cervejeira e dietas tradicionais
2014
Vacas, João António Brejo | Roquete, Carlos José dos Reis | Matos, Teresa de Jesus da Silva
Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
显示更多 [+] 显示较少 [-]The strand study aimed to analyze the performances of cattle from several genotypes, in a regime of intensive feeding, based on byproducts from the brewing industry (test A), as well as on a very concise economic analysis. The experience was based on 35 bovines from four different breeds (Frísia, Alentejana, Mertolenga and Cruzada). The animals were fed ad libitum during two to three months (depending on the type of weaning, early or traditional). We have also included in the present work some data about two other intensive feeding tests based on traditional diets, that is, using compound feed (generally known as animal feed) (test B, animal feed B-330; test C, animal feed Reagro), in order to compare the performance of the zootechnical parameters (average daily gain, GMD; conversion rate of dry matter, ICAMS; daily consumption of the feed focused on the present study, CDIP; daily consumption of hay/straw, CFDIP; weight gain rate, RGPIP) with those obtained in our test on the byproducts. It was found that there are differences not only among the fattenings, but also within the fattenings themselves. In the study of the feeding based on byproducts, the results were quite interesting in what the cattle of Alentejana and Frísia breeds are concerned, both showing an average daily gain (GMD) of 1,270 and 1,237 kg/day, respectively. The economic analysis, however, revealed a reduced efficiency in economic terms
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