Behavior pattern of beef heifers supplemented with different energy sources on oat and ryegrass pasture
| Autor: | Leandro da Silva Freitas, Luiz Angelo Damian Pizzuti, Álisson Marian Callegaro, Odilene de Souza Teixeira, Ivan Luiz Brondani, Luciane Rumpel Segabinazzi, Paulo Santana Pacheco, Dari Celestino Alves Filho |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
feeding stations
Meal geography geography.geographical_feature_category animal structures neutral detergent fiber food and beverages rumination Lolium multiflorum Biology biology.organism_classification number of bites Pasture Idle Neutral Detergent Fiber Agronomy Grazing Animal Science and Zoology Brown rice grazing lcsh:Animal culture Energy source idle lcsh:SF1-1100 |
| Zdroj: | Revista Brasileira de Zootecnia v.41 n.8 2012 Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ Revista Brasileira de Zootecnia, Volume: 41, Issue: 8, Pages: 1921-1927, Published: AUG 2012 Revista Brasileira de Zootecnia, Vol 41, Iss 8, Pp 1921-1927 (2012) |
| Popis: | The objective of this study was to evaluate behavior patterns of heifers grazing on black oat (Avena strigosa Schreb.) and ryegrass (Lolium multiflorum Lam.), fed supplementation with brown rice meal and/or protected fat. A total of 28 Charolais × Nellore crossbred heifers at average initial age of 18 months and with initial live weight of 274.9±4.97 kg were used in the experiment. Animals were kept in oat + ryegrass pastures and distributed in the following treatments: no supplementation; Megalac (MEG): protected fat supplementation; supplementation with brown rice meal (BRM); and supplementation with BRM + MEG. The neutral detergent fiber (NDF) intake of pasture either in kg or in percentage of live weight was not changed by supply of supplement, but increased linearly (0.045 kg per day) over grazing periods. Supplementation with BRM and BRM + MEG reduced grazing time, 49.63%, in relation to non-supplemented animals and animals supplemented with MEG, 63.13%. Feeding seasons per minute increased over the experimental period with reduction in time spent in each feeding station. The number of bites per feeding station decreased linearly, with a variation of 34.48% in the late grazing period. Heifers supplemented with BRM and BRM + MEG require less time for grazing and increase their idle time, with no modification in displacement patterns within the paddocks and pasture ingestion. Grazing and idle time does not change in the distinct periods of pasture use, but rumination time increases with days of pasture use and with increase in NDF intake. |
| Databáze: | OpenAIRE |
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