| Autor: |
Aline Gomes da Silva, Mário Fonseca Paulino, Edenio Detmann, Henrique Jorge Fernandes, Lincoln da Silva Amorim, Román Enrique Maza Ortega, Victor Valério de Carvalho, Josilaine Aparecida da Costa Lima, Felipe Henrique de Moura, Mariana Benevides Monteiro, Jéssika Almeida Bitencourt |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Journal of Animal Science and Biotechnology, Vol 8, Iss 1, Pp 1-9 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2049-1891 |
| DOI: |
10.1186/s40104-017-0209-x |
| Popis: |
Abstract Background Nutrition is one of the most important factors that affect animal performance, and it therefore also impacts on financial results in beef systems. In this way, finding the best strategy for feeding supplements is of paramount importance. Aiming to evaluate the effect of supplement feeding strategies for beef cows in the last third of gestation, two experiments were conducted. In Experiment 1, 35 pregnant Nellore cows were assigned to a completely randomized design with four treatments: control, which received no supplement; supplementation for the last 30 d of gestation (30-d; 3.0 kg/d); supplementation for the last 60 d of gestation (60-d; 1.5 kg/d); or supplementation for the last 90 d of gestation (90-d; 1.0 kg/d). All supplemented treatments received the same total amount of supplement throughout the experiment: 90 kg (20% of crude protein). A second experiment (Experiment 2) was delineated to evaluate the effects of the amounts offered in Experiment 1 on intake and metabolism. Four multiparous pregnant Nellore cows were assigned to a 4 × 4 Latin square design, with periods of 15 d each. Results There was a linear effect of the number of days of supplementation on calving body weight (BW; P 0.10). A significant linear effect on interval from parturition to conception (P 0.10). Nitrogen excreted through urine tended to increase linearly with the level of supplementation (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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