Ko et al., 2005. Arq. Bras. Med. Vet. Zootec., 57 (5): 616-622
Consumo voluntario e digestibilidade aparente da materia seca, materia organica, energia e parede celular das silagens de quatro genotipos de girassol (Helianthus annuus)
Voluntary intake and apparent digestibility of dry matter, organic matter, energy and cell wall components of silages of 4 sunflower genotypes (Rumbosol 91, M734, C11 and S430) were evaluated using 20 lambs in metabolic cages. A completely randomized design was used with four treatments and five replicates. No differences were observed in the dry matter, organic matter, digestible or metabolizable energy, neutral detergent fibre or acid detergent fibre intakes of the 4 genotypes. Apparent digestibility of organic matter were higher in R91, M734 and S430 than C11 genotypes, but not enough to influence the digestible organic matter intake. All of the sunflower silages were classified as suitable roughages because the dry matter intake of each silage (63.6, 69.6, 50.2 and 74.5 g DM/kg 0.75 for R91, M734, C11 and S430, respectively) was higher than the published maintenance requirement for lambs. Low averages for apparent digestibility of NDF (32.3%) and ADF (28.7%) were due to the low quality of cell wall components.