Behavior pattern of beef heifers supplemented with different energy sources on oat and ryegrass pasture

AUTOR(ES)

Pizzuti, Luiz Angelo Damian, Alves Filho, Dari Celestino, Brondani, Ivan Luiz, Pacheco, Paulo Santana, Freitas, Leandro da Silva, Segabinazzi, Luciane Rumpel, Callegaro, Álisson Marian, Teixeira, Odilene de Souza

FONTE

R. Bras. Zootec.

DATA DE PUBLICAÇÃO

2012-08

RESUMO

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.

Documentos Relacionados

• Ingestive behavior, performance and forage intake by beef heifers on tropical pasture systems
• Production parameters and forage loss of oat and rye grass pastures managed with beef heifers fed diets with energy supplementation
• Impact of nitrogen fertilization on the forage characteristics and beef calf performance on native pasture overseeded with ryegrass
• COMPORTAMENTO INGESTIVO E CONSUMO DE FORRAGEM POR NOVILHAS DE CORTE RECEBENDO SUPLEMENTOS EM PASTAGEM DE AZEVÉM
• Development and reproductive performance of beef heifers supplemented with brown rice meal and/or protected fat on temperate grasslands