Sward structure management for a maximum short-term intake rate in annual ryegrass
| Autor: | M. J. Gibb, P. C. de F. Carvalho, Carolina Bremm, M. F. Amaral, Jean Carlos Mezzalira, R. W. M. Suñe, J. K. da Trindade |
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| Přispěvatelé: | M. F. Amaral, J. C. Mezzalira, C. Bremm, J. K. Da Trindade, M. J. Gibb, RENATA WOLF SUNE MARTINS DA SILVA, CPPSUL, P. C. de F. Carvalho. |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| Popis: | This study tested the hypothesis that different sward structures, which were constructed by varying the pre- and post-grazing sward heights of annual ryegrass pasture (Lolium multiflorum Lam.) in southern Brazil, affect the short-term intake rate (STIR) by dairy cows. Treatments consisted of four sward-management strategies defined by a combination of two pre- (25 and 15 cm) and two post-grazing sward heights (10 and 5 cm): 15-05, 15-10, 25-05 and 25-10. A completely randomized block design with four replicates was used for the experimental design. The STIR was determined by the double-weighing technique. Jaw movements were evaluated using automatic recorders (IGER Behaviour Recorder). The results showed that treatment 25-10 allowed the animals to collect more herbage with a greater bite mass and thus resulted in a greater STIR. Treatments in which sward height was reduced to 10 cm generally favoured the ingestion process than treatments with a post-grazing sward height of 5 cm. |
| Databáze: | OpenAIRE |
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