Read this article in:

Effects of sex and dietary lysine on performances and serum and meat traits in finisher pigs

Dietary Lys restriction during finisher period in pigs impaired growth performances and was not successful to increase the carcass fat deposition, although it could have positive effects on the intramuscular fat proportion of pork.

Wednesday 28 October 2015 (2 years 5 months 24 days ago)
kobe.lannoo

A total of 160 Duroc×(Landrace×Large White) pigs, 50% barrows and 50% gilts, of 28.3±4.52 kg of BW were used to study the effect of lysine (Lys) restriction in the finisher period, on growth performances and serum and carcass and meat quality traits. The grower diet (from 30 to 90 kg BW) was slightly Lys-restricted (7.8 g standardised ileal digestible (SID) Lys/kg) in accordance with results from a previous trial. During the finisher period (90 to 130 kg BW), four experimental diets with decreasing SID Lys contents (6.3, 5.6, 4.2 and 3.2 g/kg) were tested. Each of the eight treatments (two sexes×four levels of Lys) was replicated five times. Each replicate was a pen with four pigs allocated together. When animals achieved 129±2.59 kg were slaughtered and carcass and meat characteristics were evaluated.

No significant interaction sex×diet was found. During the finisher period, barrows grew faster and ate more feed but tended to be less efficient than gilts. The Lys restriction affected linearly all productive performance traits; daily BW gain and feed intake decreased and feed conversion ratio increased. Also, the concentration of serum urea at slaughter tended to be higher in barrows than in gilts and was reduced quadratically by the restriction of Lys in feed. Carcasses from barrows had higher backfat thickness and lower weight of main trimmed lean cuts (ham+shoulder+loin) than those from gilts. The Lys restriction during the finisher period decreased carcass yield (quadratic) and the weight of major cuts (linear). Sex and diet had limited effect on meat characteristics; the Lys restriction decreased quadratically the proportion of protein and increased linearly the intramuscular fat (IMF) content.

We can conclude that dietary Lys restriction during finisher period in pigs impaired growth performances and was not successful to increase the carcass fat deposition, although it could have positive effects on IMF proportion of pork.

J. Suárez-Belloch, J. A. Guada and M. A. Latorre. Effects of sex and dietary lysine on performances and serum and meat traits in finisher pigs. Animal, Volume 9, Issue 10, October 2015, pp 1731-1739.
DOI: http://dx.doi.org/10.1017/S1751731115001111

Article Comments

This area is not intended to be a place to consult authors about their articles, but rather a place for open discussion among pig333.com users.

Access restricted to 333 users. In order to post a comment you must be logged in.

Not a registered user of 333?sign upand access swine prices, the search engine, ...
It is fast and free
Are you registered in 333?LOGINIf you've forgotten your password we'll send it to you here

tags