DZO CCA UFV

Brazil

DZO CCA UFV

Brazil

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Kiefer C.,DZO FAMEZ UFMS | Donzele J.L.,DZO CCA UFV | de Oliveira R.F.M.,DZO CCA UFV
Revista Brasileira de Zootecnia | Year: 2011

This study was conducted to evaluate nutritional plans of digestible lysine for boars 67 to 165 days of age, immunocastrated at their 107 and 135 days. Two hundred and forty animals, with initial body weight of 27.73 ± 1.57 kg, were sorted in a randomized block design with four nutritional plans of digestible lysine for immunocastrated pigs (0.9-0.8-0.7; 1.0-0.9-0.8; 1.1-1.0-0.9 and 1.2-1.1-1.0%, respectively from 67 to 107 days, from 108 to 135 days and 136 to 165 days) with four replications and a control plan for barrows (1.1-1.0-0.9% of digestible lysine) with eight replications and ten animals each. The nutritional plan with the sequence containing 1.1-1.0-0.9% digestible lysine improved feed conversion, reduced backfat thickness and increased the amount of lean meat of pigs carcass when compared to other nutritional plans. The other performance and carcass variables were not affected by nutritional plans. Nutritional plans with the sequence 1.1-1.0-0.9% of digestible lysine for periods of 67 to 107 days, 108 to 135 days and 136 to 165 days, respectively, meet the nutritional needs of immunocastrade boars 107 to 135 days old. © 2011 Sociedade Brasileira de Zootecnia.


Kiefer C.,Federal University of Mato Grosso | Donzele J.L.,DZO CCA UFV | de Oliveira R.F.M.,DZO CCA UFV | Suguisawa L.,Designer Genes Technologies | And 2 more authors.
Revista Brasileira de Zootecnia | Year: 2012

The objective of the present study was to evaluate nutritional plans for boars. Four hundred animals of 67 to 135 days of age and initial weight of 27.75±1.61 kg were distributed in a randomized block design with seven nutritional plans for boars (9.0-8.0; 9.0-9.0; 10.0-9.0; 10.0-10.0; 11.0-10.0; 11.0-11.0 and 12.0-11.0 g/kg of digestible lysine from 67 to 107 days and from 108 to 135 days, respectively) with four repetitions and a control plan for barrows (11.0-10.0 g/kg of digestible lysine) with eight repetitions and ten animals each. Uncastrated male swine presented better feed conversion; however they showed a lower marbling degree in relation to barrows, regardless of the nutritional plan. The nutritional plan that corresponds to the sequence of 11.0-10.0 g/kg of digestible lysine from the 67 to the 107 days and from the 108 to the 135 days, respectively, meets the nutritional needs of boars. © 2012 Sociedade Brasileira de Zootecnia.

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