The objective of this work was to economically evaluate the use of the qualitative feed restriction for castrated male pigs during finishing phase by performance and carcass characteristics of 60 animals. Ten pigs were slaughtered at the beginning of experimental phase (89.0 ± 4.2 kg) and other pigs fed rations with levels of qualitative nutritional restriction (0.0, 5.0, 10.0, 15.0 and 20.0%), obtained by inclusion of finely ground rice hulls, until the end of the experiment (127.8 ± 2.9 kg). […]

Forty barrows with high genetic potential for lean gain in the carcass averaging initial and final body weights of 60.43 ± 1.56 kg and 96.66 ± 3.22 kg, respectively, were used to evaluate the effect of dietary digestible lysine levels based on the ideal protein concept, on performance and carcasss characteristics. The animals were assigned to a randomized blocks design, with four treatments, five replicates and two animals per experimental unit. The treatments consisted of a basal diet formulated to […]

Forty barrows from commercial hybrids averaging initial weight of 60.1 ± 1.3 kg were used in a trial to evaluate different ME levels, maintaining the digestible lysine:calorie ratio, on the performance and carcass characteristics. A randomized block experimental design with four treatments, five replicate and two animals per experimental unit was used. The treatments consisted of four ME levels (3,100, 3,230, 3,370, and 3,500 kcal/kg) with 2.41 g of digestible lysine/Mcal of EM ratio. Animals were fed until the end […]

Two hundred and sixteen crossbred gilts with high genetic potential for lean meat gain, with average initial weight of 66.3 ± 4.24 kg and final weight of 95.5 ± 2.05 kg, were used to evaluate the effect of lysine levels on animals performance in the finishing phase. A randomized block design was used with four treatments, 27 replicates and two animals per experimental unit. Treatments were constituted of isoenergy diets, with different levels of total lysine (0.80, 0.90, 1.00, and […]

Fifty gilts crossbreed (Hampshire, Belgium Landrace, Pietran), with initial average weight of 60.23±0.49 kg and high genetic potential for lean meat deposition, were used to evaluate different lysine levels. A randomized blocks design, with five treatments, five replicates and two animals per experimental unit, was used. The treatments corresponded to a basal diet with 15.8% crude protein, supplemented with five levels of HCl-L-Lisine, resulting in diets with 0.75, 0.85, 0.95, 1.05, and 1.15% of lysine. There was no effect of […]

The objective of this experiment was to determine the digestible lysine requirement for male broilers in the period from 22 to 42 days. Four hundred and sixty male broilers Hubbard, with an initial average weight of 631 g, were allotted in a randomized block experimental design with five treatments, six replicates and 15 birds by experimental unit. The treatments corresponded to five L-lysine levels supplemented to a basal diet with 19,64% of crude protein and 3100 kcal of ME/Kg resulting […]