Dietary net energy levels for growing barrows from 30 to 70 kg
ABSTRACT: This study evaluated the effect of dietary net energy (NE) levels on growth performance and carcass characteristics of barrows from 30 to 70 kg of body weight (BW). Sixty barrows with initial body weight (IBW) of 31.94 ± 3.54 kg and final body weight (FBW) of 71.98 ± 5.99 kg were allotted...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2021-11-01
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| Series: | Ciência Rural |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700651&tlng=en |
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| author | Gabriela Puhl Rodrigues Charles Kiefer Karina Márcia Ribeiro de Souza Nascimento Anderson Corassa Danilo Alves Marçal Marina de Nadai Bonin Alexandre Pereira dos Santos Luana Cristiane dos Santos |
| author_facet | Gabriela Puhl Rodrigues Charles Kiefer Karina Márcia Ribeiro de Souza Nascimento Anderson Corassa Danilo Alves Marçal Marina de Nadai Bonin Alexandre Pereira dos Santos Luana Cristiane dos Santos |
| author_sort | Gabriela Puhl Rodrigues |
| collection | DOAJ |
| description | ABSTRACT: This study evaluated the effect of dietary net energy (NE) levels on growth performance and carcass characteristics of barrows from 30 to 70 kg of body weight (BW). Sixty barrows with initial body weight (IBW) of 31.94 ± 3.54 kg and final body weight (FBW) of 71.98 ± 5.99 kg were allotted to one of five dietary NE levels (2.40, 2.45, 2.50, 2.55, and 2.60 Mcal kg-1), using a completely randomized block design with six replicates and two barrows per replicate. The experimental period was divided into phase I: 30 to 50 kg and phase II: 50 to 70 kg. The variables analyzed were average daily feed intake (ADFI), net energy intake (NEI), digestible lysine intake (LysI), average daily gain (ADG), feed conversion (FC), FBW, digestible lysine conversion:gain (LysI:G), Cost:Gain (C:G), loin eye area (LEA), muscle depth (MD), first backfat layer (BF1), second backfat layer (BF2), total backfat (BFt), lean meat percentage, and carcass bonus index (BI). In phase I, there was a linear increase (P < 0.05) in FBW, ADG, NEI, and LysI with increasing NE levels in the diet. In phase II, increasing dietary NE levels also increased (P < 0.05) FBW, ADG, NEI, LysI, and FC linearly. Overall, there was a linear increase (P < 0.05) in ADG, NEI, LysI, and FC with increasing NE levels in the diet. The other performance variables were not affected (P > 0.05) by the NE levels. There was an increase (P < 0.05) in BF2 with increasing NE levels, but the other carcass characteristics were not altered (P > 0.05). We recommended 2.60 Mcal of NE kg-1 in the diet for growing barrows from 30 to 70 kg. |
| first_indexed | 2024-04-11T15:27:16Z |
| format | Article |
| id | doaj.art-c2dae5616b974c92829b8c9413d07119 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-04-11T15:27:16Z |
| publishDate | 2021-11-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-c2dae5616b974c92829b8c9413d071192022-12-22T04:16:14ZengUniversidade Federal de Santa MariaCiência Rural1678-45962021-11-0152710.1590/0103-8478cr20201033Dietary net energy levels for growing barrows from 30 to 70 kgGabriela Puhl Rodrigueshttps://orcid.org/0000-0003-3138-4230Charles Kieferhttps://orcid.org/0000-0001-9622-2844Karina Márcia Ribeiro de Souza Nascimentohttps://orcid.org/0000-0003-0482-0666Anderson Corassahttps://orcid.org/0000-0002-3969-3065Danilo Alves Marçalhttps://orcid.org/0000-0002-4211-8918Marina de Nadai Boninhttps://orcid.org/0000-0002-6910-9368Alexandre Pereira dos Santoshttps://orcid.org/0000-0003-1725-3672Luana Cristiane dos Santoshttps://orcid.org/0000-0002-1596-9979ABSTRACT: This study evaluated the effect of dietary net energy (NE) levels on growth performance and carcass characteristics of barrows from 30 to 70 kg of body weight (BW). Sixty barrows with initial body weight (IBW) of 31.94 ± 3.54 kg and final body weight (FBW) of 71.98 ± 5.99 kg were allotted to one of five dietary NE levels (2.40, 2.45, 2.50, 2.55, and 2.60 Mcal kg-1), using a completely randomized block design with six replicates and two barrows per replicate. The experimental period was divided into phase I: 30 to 50 kg and phase II: 50 to 70 kg. The variables analyzed were average daily feed intake (ADFI), net energy intake (NEI), digestible lysine intake (LysI), average daily gain (ADG), feed conversion (FC), FBW, digestible lysine conversion:gain (LysI:G), Cost:Gain (C:G), loin eye area (LEA), muscle depth (MD), first backfat layer (BF1), second backfat layer (BF2), total backfat (BFt), lean meat percentage, and carcass bonus index (BI). In phase I, there was a linear increase (P < 0.05) in FBW, ADG, NEI, and LysI with increasing NE levels in the diet. In phase II, increasing dietary NE levels also increased (P < 0.05) FBW, ADG, NEI, LysI, and FC linearly. Overall, there was a linear increase (P < 0.05) in ADG, NEI, LysI, and FC with increasing NE levels in the diet. The other performance variables were not affected (P > 0.05) by the NE levels. There was an increase (P < 0.05) in BF2 with increasing NE levels, but the other carcass characteristics were not altered (P > 0.05). We recommended 2.60 Mcal of NE kg-1 in the diet for growing barrows from 30 to 70 kg.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700651&tlng=encalorie:nutrient ratioenergy intakenutritional densityrequirements |
| spellingShingle | Gabriela Puhl Rodrigues Charles Kiefer Karina Márcia Ribeiro de Souza Nascimento Anderson Corassa Danilo Alves Marçal Marina de Nadai Bonin Alexandre Pereira dos Santos Luana Cristiane dos Santos Dietary net energy levels for growing barrows from 30 to 70 kg Ciência Rural calorie:nutrient ratio energy intake nutritional density requirements |
| title | Dietary net energy levels for growing barrows from 30 to 70 kg |
| title_full | Dietary net energy levels for growing barrows from 30 to 70 kg |
| title_fullStr | Dietary net energy levels for growing barrows from 30 to 70 kg |
| title_full_unstemmed | Dietary net energy levels for growing barrows from 30 to 70 kg |
| title_short | Dietary net energy levels for growing barrows from 30 to 70 kg |
| title_sort | dietary net energy levels for growing barrows from 30 to 70 kg |
| topic | calorie:nutrient ratio energy intake nutritional density requirements |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700651&tlng=en |
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