Author(s): Ribeiro, Diogo Alexandre Carreira
Date: 2015
Persistent ID: http://hdl.handle.net/10400.5/9231
Origin: Repositório da UTL
Subject(s): piglets; crude protein; valine: lysine ratio; average daily ingestion; average daily gain; feed conversion ratio
Mestrado em Engenharia Zootécnica - Produção Animal - Instituto Superior de Agronomia / Faculdade de Medicina Veterinária
The effect of different digestive ileal standart of valine:lysine ratios on low crude protein content, on the zootecnic performances of 12 to 30 kg piglets was studied using 180 piglets, on a 4 week trial. Those 180 piglets were distributed on 5 different experimental diets, with 36 animals each and installed on a 3 piglets per cage. The diets were elaborated with a 15, 5% crude protein content with a digestive ileal standart of valine:lysine ratio of 60, 65, 70, 75 and 80%, diets 1, 2, 3, 4 and 5 respectively. The average daily gain was higher on the piglets with a 70% ratio (diet 3), comparatively with diets 2, 4 and 5 (P=0, 0597). The final weight, average daily intake and feed convertion ratio were not significantly different a mong diets. These results show that the best digestive ileal standart ratio of valine:lysine is the 70% for piglests with live weight of 12 to 30 kg
