Levels of Supplementation for Grazing Beef Heifers
The objective of this experiment was to evaluate the effect of providing different levels of a supplement on the nutritional characteristics and productive performance of heifers on pasture during the rainy-dry transition and dry season in Brazil or tropical area. Thirty crossbred heifers with predo...
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| Format: | Article |
| Language: | English |
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Asian-Australasian Association of Animal Production Societies
2014-06-01
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| Series: | Asian-Australasian Journal of Animal Sciences |
| Subjects: | |
| Online Access: | http://www.ajas.info/upload/pdf/ajas-27-6-806-6.pdf |
| _version_ | 1811233822635720704 |
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| author | Carla Heloisa Avelino Cabral Mario Fonseca Paulino Edenio Detmann Sebastião de Campos Valadares Filho Lívia Vieira de Barros Ériton Egidio Lisboa Valente Maristela de Oliveira Bauer Carlos Eduardo Avelino Cabral |
| author_facet | Carla Heloisa Avelino Cabral Mario Fonseca Paulino Edenio Detmann Sebastião de Campos Valadares Filho Lívia Vieira de Barros Ériton Egidio Lisboa Valente Maristela de Oliveira Bauer Carlos Eduardo Avelino Cabral |
| author_sort | Carla Heloisa Avelino Cabral |
| collection | DOAJ |
| description | The objective of this experiment was to evaluate the effect of providing different levels of a supplement on the nutritional characteristics and productive performance of heifers on pasture during the rainy-dry transition and dry season in Brazil or tropical area. Thirty crossbred heifers with predominance of Zebu breed were used in a completely randomized experimental design. Treatments consisted of a mineral supplement and 0.5, 1.0, 1.5, or 2.0 kg/animal/d of a protein supplement containing 300 g crude protein (CP)/kg of dry matter (DM). In the rainy-dry transition season there was quadratic effect of the protein supplementation (p<0.10) on daily weight gain (DWG). A linear relationship (p<0.10) was found between increasing supplement intake and intakes of DM, organic matter (OM), crude protein (CP), ether extract (EE), non fibrous carbohydrates (NFC) and total digestible nutrients (TDN). Coefficients of apparent digestibility of CP, EE, and NFC increased linearly (p<0.10) with increasing supplement levels, but there was no effect on the DM apparent digestibility (p>0.10); the microbial efficiency (g CPmic/kg TDN) and the relationship of microbial nitrogen flow with nitrogen intake (g/g nitrogen intake) were negative linear profiles. In the dry season, the descriptive pattern least squares means showed a trend of stabilization of DWG from the supply of 0.98 kg of protein supplement; the intakes of DM, OM, CP, EE, NFC, and TDN showed increasing linear relationship (p<0.10) with protein supplement levels; the means of apparent digestibility coefficients of the different dietary fractions presented a linear-response-plateau (LRP); the microbial nitrogen flow (g/d) showed positive linear profile (p<0.10) for supplementation levels. It is concluded that supplementation improves the productive performance of grazing heifers and that 1.0 kg/d of supplement per animal gives the maximum increment of weight gain. |
| first_indexed | 2024-04-12T11:26:57Z |
| format | Article |
| id | doaj.art-c8aa8523246e49b091e116ecb679561b |
| institution | Directory Open Access Journal |
| issn | 1011-2367 1976-5517 |
| language | English |
| last_indexed | 2024-04-12T11:26:57Z |
| publishDate | 2014-06-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Asian-Australasian Journal of Animal Sciences |
| spelling | doaj.art-c8aa8523246e49b091e116ecb679561b2022-12-22T03:35:13ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172014-06-0127680681710.5713/ajas.2013.135428811Levels of Supplementation for Grazing Beef HeifersCarla Heloisa Avelino CabralMario Fonseca Paulino0Edenio Detmann1Sebastião de Campos Valadares Filho2Lívia Vieira de Barros3Ériton Egidio Lisboa Valente4Maristela de Oliveira Bauer5Carlos Eduardo Avelino Cabral6 Departamento de Zootecnia, Researchers of INCT-CA, Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerias, .Brazil Departamento de Zootecnia, Researchers of INCT-CA, Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerias, .Brazil Departamento de Zootecnia, Researchers of INCT-CA, Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerias, .Brazil Departamento de Zootecnia, Researchers of INCT-CA, Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerias, .Brazil Departamento de Zootecnia, Researchers of INCT-CA, Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerias, .Brazil Departamento de Engenharia Rural, Universidade Federal do Espírito Santo (UFES), 29075-910, Alegre, Espírito Santo, .Brazil Faculdade de Agronomia, Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso (UFMT), 78060-900, Cuiabá, Mato Grosso, .BrazilThe objective of this experiment was to evaluate the effect of providing different levels of a supplement on the nutritional characteristics and productive performance of heifers on pasture during the rainy-dry transition and dry season in Brazil or tropical area. Thirty crossbred heifers with predominance of Zebu breed were used in a completely randomized experimental design. Treatments consisted of a mineral supplement and 0.5, 1.0, 1.5, or 2.0 kg/animal/d of a protein supplement containing 300 g crude protein (CP)/kg of dry matter (DM). In the rainy-dry transition season there was quadratic effect of the protein supplementation (p<0.10) on daily weight gain (DWG). A linear relationship (p<0.10) was found between increasing supplement intake and intakes of DM, organic matter (OM), crude protein (CP), ether extract (EE), non fibrous carbohydrates (NFC) and total digestible nutrients (TDN). Coefficients of apparent digestibility of CP, EE, and NFC increased linearly (p<0.10) with increasing supplement levels, but there was no effect on the DM apparent digestibility (p>0.10); the microbial efficiency (g CPmic/kg TDN) and the relationship of microbial nitrogen flow with nitrogen intake (g/g nitrogen intake) were negative linear profiles. In the dry season, the descriptive pattern least squares means showed a trend of stabilization of DWG from the supply of 0.98 kg of protein supplement; the intakes of DM, OM, CP, EE, NFC, and TDN showed increasing linear relationship (p<0.10) with protein supplement levels; the means of apparent digestibility coefficients of the different dietary fractions presented a linear-response-plateau (LRP); the microbial nitrogen flow (g/d) showed positive linear profile (p<0.10) for supplementation levels. It is concluded that supplementation improves the productive performance of grazing heifers and that 1.0 kg/d of supplement per animal gives the maximum increment of weight gain.http://www.ajas.info/upload/pdf/ajas-27-6-806-6.pdfNutritional ParametersProtein SupplementWeight Gain |
| spellingShingle | Carla Heloisa Avelino Cabral Mario Fonseca Paulino Edenio Detmann Sebastião de Campos Valadares Filho Lívia Vieira de Barros Ériton Egidio Lisboa Valente Maristela de Oliveira Bauer Carlos Eduardo Avelino Cabral Levels of Supplementation for Grazing Beef Heifers Asian-Australasian Journal of Animal Sciences Nutritional Parameters Protein Supplement Weight Gain |
| title | Levels of Supplementation for Grazing Beef Heifers |
| title_full | Levels of Supplementation for Grazing Beef Heifers |
| title_fullStr | Levels of Supplementation for Grazing Beef Heifers |
| title_full_unstemmed | Levels of Supplementation for Grazing Beef Heifers |
| title_short | Levels of Supplementation for Grazing Beef Heifers |
| title_sort | levels of supplementation for grazing beef heifers |
| topic | Nutritional Parameters Protein Supplement Weight Gain |
| url | http://www.ajas.info/upload/pdf/ajas-27-6-806-6.pdf |
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