Mineral requirements for growth of wool and hair lambs
The present study was conducted to determine the body composition and the mineral requirements for growth of wool and hair lambs. A total of 34 castrated lambs with an initial body weight (BW) of 19.9±0.8 kg were used; 17 of these lambs were of the genotype Ideal × Ile de France and 17 were Santa In...
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| Language: | English |
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Sociedade Brasileira de Zootecnia
2013-05-01
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| Series: | Revista Brasileira de Zootecnia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500007 |
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| author | Izabelle Auxiliadora Molina de Almeida Teixeira Kléber Tomás de Resende Aderbal Marcos de Azevêdo Silva Américo Garcia da Silva Sobrinho Carla Joice Härter Ana Paula de Oliveira Sader |
| author_facet | Izabelle Auxiliadora Molina de Almeida Teixeira Kléber Tomás de Resende Aderbal Marcos de Azevêdo Silva Américo Garcia da Silva Sobrinho Carla Joice Härter Ana Paula de Oliveira Sader |
| author_sort | Izabelle Auxiliadora Molina de Almeida Teixeira |
| collection | DOAJ |
| description | The present study was conducted to determine the body composition and the mineral requirements for growth of wool and hair lambs. A total of 34 castrated lambs with an initial body weight (BW) of 19.9±0.8 kg were used; 17 of these lambs were of the genotype Ideal × Ile de France and 17 were Santa Inês. Ten lambs (5 of each genotype) were slaughtered at the beginning of the experiment to establish their initial body composition. The remaining lambs were assigned to one of three diets (40% roughage and 60% concentrate, 60% roughage and 40% concentrate, or 80% roughage and 20% concentrate) in a 2 × 3 factorial arrangement of treatments. All of the diets were provided ad libitum. When the group under 40% roughage and 60% concentrate reached 35 kg BW, all of the animals were slaughtered. Linear regressions were used to determine the relationship between the shrunk BW and the empty body weight (EBW) for each genotype. These equations were compared and revealed differences between the genotypes. The allometric equations were calculated using the relationship between the amount of minerals and the EBW. The equations of a given mineral for each genotype were compared to verify if they were statistically different. The equations for calcium, phosphorus, magnesium and sodium differed between genotypes. The same equations were used to estimate the major body mineral composition per kilogram of EBW. The net requirement for gain of the fleece-free Ideal × Ile de France lambs ranged from 7.77 to 6.80 g Ca, 4.54 to 4.14 g P, 0.30 to 0.27 g Mg, 1.18 to 1.07 g K and 0.84 to 0.76 g Na per kg BW gain, and the requirements of the Santa Inês animals ranged from 9.57 to 8.37 g Ca, 5.39 to 4.91 g P, 0.36 to 0.33 g Mg, 1.18 to 1.07 g K and 0.90 to 0.81 g Na per kg BW gain for the lambs weighting 20 to 35 kg. Santa Inês lambs showed higher requirements for Ca, P, Mg and Na. |
| first_indexed | 2024-12-23T14:49:17Z |
| format | Article |
| id | doaj.art-0d02419df95d4da9ba125affd725e6f2 |
| institution | Directory Open Access Journal |
| issn | 1516-3598 1806-9290 |
| language | English |
| last_indexed | 2024-12-23T14:49:17Z |
| publishDate | 2013-05-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-0d02419df95d4da9ba125affd725e6f22022-12-21T17:42:59ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902013-05-01425347353Mineral requirements for growth of wool and hair lambsIzabelle Auxiliadora Molina de Almeida TeixeiraKléber Tomás de ResendeAderbal Marcos de Azevêdo SilvaAmérico Garcia da Silva SobrinhoCarla Joice HärterAna Paula de Oliveira SaderThe present study was conducted to determine the body composition and the mineral requirements for growth of wool and hair lambs. A total of 34 castrated lambs with an initial body weight (BW) of 19.9±0.8 kg were used; 17 of these lambs were of the genotype Ideal × Ile de France and 17 were Santa Inês. Ten lambs (5 of each genotype) were slaughtered at the beginning of the experiment to establish their initial body composition. The remaining lambs were assigned to one of three diets (40% roughage and 60% concentrate, 60% roughage and 40% concentrate, or 80% roughage and 20% concentrate) in a 2 × 3 factorial arrangement of treatments. All of the diets were provided ad libitum. When the group under 40% roughage and 60% concentrate reached 35 kg BW, all of the animals were slaughtered. Linear regressions were used to determine the relationship between the shrunk BW and the empty body weight (EBW) for each genotype. These equations were compared and revealed differences between the genotypes. The allometric equations were calculated using the relationship between the amount of minerals and the EBW. The equations of a given mineral for each genotype were compared to verify if they were statistically different. The equations for calcium, phosphorus, magnesium and sodium differed between genotypes. The same equations were used to estimate the major body mineral composition per kilogram of EBW. The net requirement for gain of the fleece-free Ideal × Ile de France lambs ranged from 7.77 to 6.80 g Ca, 4.54 to 4.14 g P, 0.30 to 0.27 g Mg, 1.18 to 1.07 g K and 0.84 to 0.76 g Na per kg BW gain, and the requirements of the Santa Inês animals ranged from 9.57 to 8.37 g Ca, 5.39 to 4.91 g P, 0.36 to 0.33 g Mg, 1.18 to 1.07 g K and 0.90 to 0.81 g Na per kg BW gain for the lambs weighting 20 to 35 kg. Santa Inês lambs showed higher requirements for Ca, P, Mg and Na.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500007body compositionmajor mineralnet requirementssheep |
| spellingShingle | Izabelle Auxiliadora Molina de Almeida Teixeira Kléber Tomás de Resende Aderbal Marcos de Azevêdo Silva Américo Garcia da Silva Sobrinho Carla Joice Härter Ana Paula de Oliveira Sader Mineral requirements for growth of wool and hair lambs Revista Brasileira de Zootecnia body composition major mineral net requirements sheep |
| title | Mineral requirements for growth of wool and hair lambs |
| title_full | Mineral requirements for growth of wool and hair lambs |
| title_fullStr | Mineral requirements for growth of wool and hair lambs |
| title_full_unstemmed | Mineral requirements for growth of wool and hair lambs |
| title_short | Mineral requirements for growth of wool and hair lambs |
| title_sort | mineral requirements for growth of wool and hair lambs |
| topic | body composition major mineral net requirements sheep |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000500007 |
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