Dietary net energy mainly affects growth performance and pork quality of finishing pigs

Moreira, Camila de Araújo; Bonagúrio, Lucas Pimentel; Esteves, Lucas Antônio Costa; Sitanaka, Natália Yoko; Pozza, Paulo César

doi:10.1590/1678-992x-2019-0257

Cited by 1 publication

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References 33 publications

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“…However, it is worth noting that, although just numerically, pigs given the high energy diet ate less feed (p = 0.10) than the other groups, this being especially observed during the grower period (from around 80 to 110 kg BW; p = 0.04). The negative relationship between dietary energy level and feed consumption in pigs has also been found by other authors [8,28], and it is justified because pigs adjust their voluntary feed intake to maintain a constant daily energy intake [29]. Regardless the lack of effect of low-CP and -AA diet on ADG and ADFI in comparison to the control diet, it corroborates the results of Knowles et al [25], although Suárez-Belloch et al [30] reported a lower ADG and ADFI when a greater reduction of dietary CP and AA was applied (from 17.2 to 10.6% CP and from 0.77 to 0.42% lysine).…”

Section: Growth Performancesupporting

confidence: 81%

Effect of Castration Type and Diet on Growth Performance, Serum Sex Hormones and Metabolites, and Carcass Quality of Heavy Male Pigs

Pérez-Ciria

Miana-Mena

Álvarez-Rodríguez

et al. 2022

Animals

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A trial was carried out to study the effect of type of castration and diet on pigs destined for Teruel ham production, which is a Spanish protected designation of origin for dry-cured ham. A total of 144 Duroc × (Landrace × Large White) male pigs were used. Half of them were surgically castrated and the other half were immunocastrated with three doses at approximately 25, 58 and 79 kg of body weight. Furthermore, three diets (control vs. high energy vs. low crude protein-CP- and amino acids-AA) were tested from 80 to 137 kg of body weight. Growth performance, serum sex hormones and metabolites, and carcass quality were evaluated. Immunocastrated males grew faster and had better feed conversion ratio than surgically castrated males, but presented lower carcass fatness. Pigs fed the high-energy diet and the low-CP and -AA diet were more efficient at transforming feed into gain than those fed the control diet, but no effect was detected on carcass quality. In conclusion, surgically castrated males are preferable than immunocastrated males for Teruel dry-cured ham elaboration. Besides, a high-energy diet or a low-CP and -AA diet might improve productive performances, but does not provide any benefit in terms of carcass quality.

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