Net energy for 60- to 120-kg pigs fed low-crude protein diets

Ciência Rural

Silva, Francisco Carlos de Oliveira²  Abreu, Márvio Lobão Teixeira de⁴  Haese, Douglas⁵  Donzele, Juarez Lopes¹  Oliveira, Rita Flávia Miranda de¹  Saraiva, Alysson¹  Santos, Fabrício de Almeida³ 

[1] Universidade Federa de Viçosa, Viçosa, Brasil;Empresa de Pesquisa Agropecuária de Minas Gerais, Viçosa, Brasil;Agroceres, Rio Claro, Brasil;Universidade Federal de Lavras, Lavras, Brasil;Universidade Vila Velha, Vila Velha, Brasil

关键词: carcass;    finishing phase;    nutrition;    requirement;   

DOI  :  10.1590/0103-8478cr20131136

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Two experiments were conducted to determine the effects of dietary net energy content (NE) on performance and carcass traits of finishing barrows fed low-crude protein (CP) diets. Pigs (60.0±1.05kg, Exp. 1, 93.0±1.56kg, Exp. 2) were allotted in a randomized block design to 3 dietary treatments. Exp. 1 had 6 pens treatment-1 and Exp. 2 had 8 pens treatment-1 and all pens had 2 pigs. The treatments were: 199g kg-1 CP and 2566kcal kg-1 NE, 155g kg-1 CP and 2631kcal kg-1 NE, 155gk g-1 CP and 2566kcal kg-1 NE in Exp. 1, and 180g kg-1 CP and 2588kcal kg-1 NE, 145g kg-1 CP and 2638kcal kg-1 NE, 145g kg-1 CP and 2588kcal kg-1 NE, in Exp. 2. In Ep.1, except for average daily gain (ADG) there was no effect of dietary CP or NE on any other parameter evaluated. The diet with 155g kg-1 CP and 2566kcal kg-1 NE resulted in greatest ADG. In Exp. 2, the greatest results of ADFI and ADG were obtained with 145g kg-1 CP and 2588kcal kg-1 of NE. Pigs fed the diet with 180g kg-1 CP and 2588kcal kg-1 NE had less carcass meat. There was no effect of dietary CP or NE on backfat. The CP diet containing 2566kcal kg-1 NE resulted in greatest ADG of 60- to 95-kg barrows. For 95- to 120-kg barrows the diet with 145gk g-1 CP and 2588kcal kg-1 of NE resulted in greatest ADG and carcass meat.

【 授权许可】

Unknown