University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Renate Schwameis
(2007):
Performance parameters of finishing pigs as influenced by sex and different theronine intake levels.
Master / Diploma Thesis,
BOKU-Universität für Bodenkultur,
pp 74.
UB BOKU
obvsg
- Abstract:
- This study was conducted to investigate the influence of sex on zootechnical parameters and parameters of feed intake behaviour. The same parameters were analyzed in connection with different threonine intake levels and, moreover, for a threonine × sex interaction using 60 finishing ÖHYB pigs. The basal finisher diet had 13.4 MJ ME/kg and 13.5% CP. The six treatment diets contained graded levels of threonine (4.9, 5.0, 5.4, 5.8, 6.1 and 6.5 g/kg for treatments 1 to 6, respectively) resulting in different Lys:Thr ratios (0.60, 0.64, 0.68, 0.73, 0.76 and 0.81, respectively). Water and feed were provided ad libitum. The inquired zootechnical parameters are average daily gain, average daily feed intake, and feed conversion efficiency. Parameters of feed intake behaviour as researched were visits per day, duration of feed intake per day, and feed intake per visit. The only trait where no significant influence (p<0.1) of sex and dietary threonine level was found is feed conversion efficiency. In all other parameters but feed conversion efficiency barrows exceeded gilts. For all animals, as well as for barrows and gilts only, treatment 3 had highest body weight gain and highest feed intake, concentrations above 5.4 g/kg had no further positive effect on performance. Broken line estimation of the required Lys:Thr ratio resulted in 0.68 Lys:Thr for barrows and 0.66 Lys:Thr for gilts, when estimated for average daily gain. These ratios are the same as measured for treatment 3. The high time resolution of this study made it possible to show that pigs did not perform always according to the dietary threonine level of their diets with treatment 3 often being above average and barrows of treatment 4 below average, whereas gilts of treatment 4 performed at the same level as gilts of other treatment groups.
- Beurteilende(r): Windisch Wilhelm Matthias