Data/hora: 10/06/2024 16:17:05

Provedor de dados: | 63
País: | Brazil
Título: | Apparent digestibility of diets with combinations of soybean hulls and coastcross (Cynodon sp.) hay offered to ram lambs
Autores: | Araujo,Rafael Canonenco de; Pires,Alexandre Vaz; Susin,Ivanete; Urano,Fumi Shibata; Mendes,Clayton Quirino; Rodrigues,Gustavo Henrique; Packer,Irineu Umberto.
Data: | 2008-12-01
Ano: | 2008
Palavras-chave: | NDF; Hair sheep; Nitrogen balance; Santa Inês; Water intake.
Resumo: | Soybean hulls (SH) are an alternative fiber source that may be used to maintain neutral detergent fiber (NDF) concentration while increasing the energy concentration of ruminant diets. The objective of this experiment was to determine the effects of replacing coastcross (Cynodon sp.) hay NDF by SH NDF on the apparent digestibility of nutrients and nitrogen balance of Santa Inês ram lambs. Twenty-four animals (42.5 ± 3.6 kg of body weight and six months old) were placed in metabolism crates and assigned in a randomized complete block design defined by body weight (BW). Experimental diets provided a similar concentration of NDF (52%) and crude protein (15%). Hay NDF from a 70% roughage-based diet was replaced with SH NDF by 33%, 67%, and 100%, resulting in 0, 25, 52, and 77% of SH in the dietary dry matter (DM), respectively. There was a linear increase (p &lt; 0.01) on dry matter and organic matter (OM) intakes expressed as kg day-1 and % of BW, with SH inclusion. The OM digestibility showed a quadratic effect (p &lt; 0.05) with SH inclusion while crude protein digestibility showed a linear decrease (p &lt; 0.0001). A quadratic effect was also observed for NDF (p &lt; 0.05) and acid detergent fiber (p &lt; 0.01) digestibilities. The N retentions, as % of N consumed and % of N absorbed, resulted in quadratic effects (p &lt; 0.05) with SH addition. There was no effect (p &gt; 0.05) on water intake when SH replaced hay. The SH can replace forage and may be included up to 77% in the dietary DM of ram lambs with satisfactory values of nutrient digestibilities.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600003
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162008000600003
Formato: | text/html
Fonte: | Scientia Agricola  v.65 n.6 2008
Fonte: | info:eu-repo/semantics/openAccess