Desempenho, características da carcaça, digestibilidade aparente dos nutrientes, metabolismo de nitrogênio e parâmetros ruminais de cordeiros alimentados com rações contendo polpa cítrica úmida semidespectinada e/ou polpa cítrica desidratada

Abstract

Desempenho, características da carcaça, digestibilidade aparente dos nutrientes, metabolismo de nitrogênio e parâmetros ruminais de cordeiros alimentados com rações contendo polpa cítrica úmida semidespectinada e/ou polpa cítrica desidratada Performance, carcass characteristics, apparent digestibility of nutrients, nitrogen metabolism and ruminal measures of lambs fed diets containing wet low pectin citrus pulp and/or dried citrus pulp ABSTRACT -The objective of this study was to determine the effects of partial replacement of dried citrus pulp (DCP)by wet low pectin citrus pulp (WLPCP), wet low pectin citrus pulp silage (WLPCPS) or wet low pectin citrus pulp silage with sodium benzoate (WLPCPS+B) on performance and carcass characteristics, apparent digestibility of nutrients, ruminal measures, and nitrogen metabolism of lambs. In the performance trial, 64 Santa Inês ram lambs were fed 95% concentrate and 5% sugarcane bagasse diets during 56 days. The experimental design was a randomized complete block (RCB). The control diet contained 69.5% DCP, while in the other treatments fresh or ensiled WLPCP replaced DCP by 30% on a DM basis.There were no differences in DMI, ADG or carcass characteristics. However, feed efficiency was greater for lambs fed WLPCP compared with lambs fed DCP. In the digestibility trial, 16 Santa Inês ram lambs, canulated in the rumen, were assigned to a RCB design. Animals were fed diets containing 85% of concentrate and 15% of sugarcane bagasse. The control diet contained 75.3% DCP. A portion (30%) of the DCP DM was replaced by WLPCP, WLPCPS or WLPCPS+B. There was no difference in DM, organic matter or crude protein apparent digestibilities, except for neutral detergent fiber digestibility. Additionally, ruminal ammonia concentration was higher in diets containing DCP compared with WLPCPS and WLPCPS+B. Nevertheless, no effects of treatments were seen on the other ruminal measures. Fresh or ensiled WLPCP can partially replace DCP in rations with high level of concentrate for feedlot lambs.

Consumo, digestibilidade e parâmetros ruminais em ovinos recebendo silagens e fenos em associação à palma forrageira

“…A proporção de carboidratos nãofibrosos e FDN nas dietas pode ter promovido uma fermentação adequada, o que contribuiu para que não houvesse diferença no consumo de MS entre os tratamentos. Como pode ser observado na Tabela 5, os valores de pH e as concentrações de amônia ruminal em todos os tratamentos e horários avaliados ficaram dentro da faixa sugerida por diversos autores (WERNERBACH FILHO, et al 2006;RODRIGUES et al 2011) Borgatti et al (2005) afirmam que a principal limitação da conservação da cultura de girassol, pelo processo de ensilagem, é o baixo teor de matéria seca próximo ao momento do corte, em torno de 24%. Com relação ao consumo de FDN (g/dia) foi observada superioridade (P<0,01) para o feno de capim-elefante em relação à silagem de girassol e semelhança para os demais volumosos, apresentada média de 0,400kg/dia.…”

Protein-energy supplementation for lambs: feed intake, ingestive behavior, rumen parameters and nutrient digestibility

“…Rumen pH changed as a function of sampling time, decreasing after feeding ( Table 4). The growth of rumen bacteria through fermentation processes likely decreased pH over time, but values between 6.5 and 6.8 were suitable for fiber fermentation and digestion (MERTENS, 1979;ØRSKOV, 1982;RODRIGUES et al, 2011;WERNERBACH FILHO, et al, 2006;). However, corroborating other studies on lambs that tested diets increasing levels of concentrate (GERON et al, 2013), minerals, energy and protein associated with Marando grass (CARVALHO et al, 2011), and different levels of sorghum (AGUERRE et al, 2009), rumen pH did not change as a function of supplementation.…”

A meta-analysis of in situ degradability of corn grains and non-starch energy sources found in Brazil

“…The values for DM (Table 1) of both starch and nonstarch ingredients in pectin are adequate for its use in animal feed. Unlike soybean hulls, citrus fruit pulp can be used fresh, dried, or pressed in pelletized form (Rodrigues et al, 2011;Santos et al, 2014.). Therefore, it is important to note that there are farms that use fresh citrus pulp and pressed citrus fruit pulp as they are cheaper than the pelleted pulp (Pereira et al, 2008).…”