Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions
Abstract: The objective of this work was to evaluate the effects of nutritional plans and breed composition on nutrient intake and digestibility, nitrogen balance, and performance of dairy heifers in tropical conditions. Thirty-six heifers - 12 Holstein, 12 Gyr, and 12 Gyrolando F1 (½ Holstein × ½ G...
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2018-02-01
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| Series: | Pesquisa Agropecuária Brasileira |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200247&tlng=en |
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| author | Carlos Alberto Alves Oliveira Filho Fernanda Samarini Machado Alexandre Lima Ferreira Thierry Ribeiro Tomich Rogério Martins Maurício Mariana Magalhães Campos Camilla Flávia Portela Gomes da Silva José Augusto Gomes de Azevêdo Luiz Gustavo Ribeiro Pereira |
| author_facet | Carlos Alberto Alves Oliveira Filho Fernanda Samarini Machado Alexandre Lima Ferreira Thierry Ribeiro Tomich Rogério Martins Maurício Mariana Magalhães Campos Camilla Flávia Portela Gomes da Silva José Augusto Gomes de Azevêdo Luiz Gustavo Ribeiro Pereira |
| author_sort | Carlos Alberto Alves Oliveira Filho |
| collection | DOAJ |
| description | Abstract: The objective of this work was to evaluate the effects of nutritional plans and breed composition on nutrient intake and digestibility, nitrogen balance, and performance of dairy heifers in tropical conditions. Thirty-six heifers - 12 Holstein, 12 Gyr, and 12 Gyrolando F1 (½ Holstein × ½ Gyr) - were housed in a tie-stall system and randomly distributed, adopting a completely randomized design in a 3×3 factorial arrangement (nutritional plans and breed composition). The diets were formulated to enable weight gains of 200, 400, and 800 g per day, corresponding to the nutritional plans 11, 14, and 19 g kg-1 body weight (BW), respectively. The intake of dry matter, fibrous fractions (g kg-1 BW-0.75), and metabolizable energy (kcal-1 BW-0.75) in the 11-g kg-1 plan were greater for Gyr heifers than for Gyrolando and Holstein heifers. Ether extract digestibility was 13.85% higher for Gyr heifers compared with Gyrolando F1 in the 19-g kg-1 plan. The increase in the nutritional plans shows a quadratic response to nutrient intake and a linear response to average daily gain, but does not affect the digestibility coefficients. Gyr and Gyrolando F1 heifers present similar nutritional efficiency to that of Holstein heifers. |
| first_indexed | 2024-04-11T16:55:17Z |
| format | Article |
| id | doaj.art-4e802c8a98cf4954a0a916a75a40822f |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2024-04-11T16:55:17Z |
| publishDate | 2018-02-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-4e802c8a98cf4954a0a916a75a40822f2022-12-22T04:13:17ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212018-02-0153224725510.1590/s0100-204x2018000200014Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositionsCarlos Alberto Alves Oliveira FilhoFernanda Samarini MachadoAlexandre Lima FerreiraThierry Ribeiro TomichRogério Martins MaurícioMariana Magalhães CamposCamilla Flávia Portela Gomes da SilvaJosé Augusto Gomes de AzevêdoLuiz Gustavo Ribeiro PereiraAbstract: The objective of this work was to evaluate the effects of nutritional plans and breed composition on nutrient intake and digestibility, nitrogen balance, and performance of dairy heifers in tropical conditions. Thirty-six heifers - 12 Holstein, 12 Gyr, and 12 Gyrolando F1 (½ Holstein × ½ Gyr) - were housed in a tie-stall system and randomly distributed, adopting a completely randomized design in a 3×3 factorial arrangement (nutritional plans and breed composition). The diets were formulated to enable weight gains of 200, 400, and 800 g per day, corresponding to the nutritional plans 11, 14, and 19 g kg-1 body weight (BW), respectively. The intake of dry matter, fibrous fractions (g kg-1 BW-0.75), and metabolizable energy (kcal-1 BW-0.75) in the 11-g kg-1 plan were greater for Gyr heifers than for Gyrolando and Holstein heifers. Ether extract digestibility was 13.85% higher for Gyr heifers compared with Gyrolando F1 in the 19-g kg-1 plan. The increase in the nutritional plans shows a quadratic response to nutrient intake and a linear response to average daily gain, but does not affect the digestibility coefficients. Gyr and Gyrolando F1 heifers present similar nutritional efficiency to that of Holstein heifers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200247&tlng=enGyrGyrolandoingestionnitrogen balanceweight gain |
| spellingShingle | Carlos Alberto Alves Oliveira Filho Fernanda Samarini Machado Alexandre Lima Ferreira Thierry Ribeiro Tomich Rogério Martins Maurício Mariana Magalhães Campos Camilla Flávia Portela Gomes da Silva José Augusto Gomes de Azevêdo Luiz Gustavo Ribeiro Pereira Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions Pesquisa Agropecuária Brasileira Gyr Gyrolando ingestion nitrogen balance weight gain |
| title | Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions |
| title_full | Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions |
| title_fullStr | Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions |
| title_full_unstemmed | Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions |
| title_short | Nutritional plans on the intake, digestibility, and performance of dairy heifers of different breed compositions |
| title_sort | nutritional plans on the intake digestibility and performance of dairy heifers of different breed compositions |
| topic | Gyr Gyrolando ingestion nitrogen balance weight gain |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000200247&tlng=en |
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