Effect of crude glycerol on pellet mill production and nursery pig growth performance1,2

Abstract

The objective of this study was to determine the effects of diets containing crude glycerol on pellet mill production efficiency and nursery pig growth performance. In a pilot study, increasing crude glycerol (0, 3, 6, 9, 12, and 15%) in a corn-soybean meal diet was evaluated for pellet mill production efficiency. All diets were steam conditioned to 65.5 degrees C and pelleted through a pellet mill equipped with a die that had an effective thickness of 31.8 mm and holes 3.96 mm in diameter. Each diet was replicated by manufacturing a new batch of feed 3 times. Increasing crude glycerol increased both the standard (linear and quadratic, P < 0.01) and modified (linear, P < 0.01; quadratic, P </= 0.02) pellet durability indexes up to 9% with no further benefit thereafter. The addition of crude glycerol decreased (linear; P < 0.01) production rate (t/h) and production efficiency (kWh/t). In a 26-d growth assay, 182 pigs (initial BW, 11.0 +/- 1.3 kg; 5 or 6 pigs/pen) were fed 1 of 7 corn-soybean meal-based diets with no added soy oil or crude glycerol (control), the control diet with 3 or 6% added soy oil, 3 or 6% added crude glycerol, and 6 or 12% addition of a 50:50 (wt/wt) soy oil/crude glycerol blend with 5 pens/diet. The addition of crude glycerol lowered (P < 0. 01) delta temperature, amperage, motor load, and production efficiency. The addition of crude glycerol improved (P < 0.01) pellet durability compared with soy oil and the soy oil/crude glycerol blend treatments. Pigs fed increasing crude glycerol had increased (linear, P = 0.03) ADG. Average daily gain tended to increase with increasing soy oil (quadratic; P = 0.07) or the soy oil/crude glycerol blend (linear, P = 0.06). Adding crude glycerol to the diet did not affect G:F compared with the control. Gain:feed tended to increase with increasing soy oil (linear, P < 0.01; quadratic, P = 0.06) or the soy oil/crude glycerol blend (linear, P < 0.01; quadratic, P = 0.09). Nitrogen digestibility tended (P = 0.07) to decrease in pigs fed crude glycerol compared with pigs fed the soy oil treatments. Apparent digestibility of GE tended (P = 0.08) to be greater in the pigs fed soy oil compared with pigs fed the soy oil/crude glycerol blends. In conclusion, adding crude glycerol to the diet before pelleting increased pellet durability and improved feed mill production efficiency. The addition of 3 or 6% crude glycerol, soy oil, or a blend of soy oil and glycerol in diets for 11- to 27-kg pigs tended to increase ADG. For pigs fed crude glycerol, this was a result of increased ADFI, whereas, for pigs fed soy oil or the soy oil/crude glycerol, the response was a result of increased G:F.

Substituição de milho por glicerina bruta em dietas para suínos em terminação

“…2). Estes resultados estão de acordo com outros pesquisadores, que, analisando níveis de inclusão de glicerina bruta na ração, relataram que a sua utilização na ração não afetou o desempenho de suínos na fase de creche (Lammers et al, 2007), crescimento e terminação (Mourot et al, 1994;Berenchtein, 2008 Groesbeck et al (2008) avaliaram os efeitos da inclusão de 3 e 6% de glicerina bruta e 6 e 12% de glicerina bruta associada com óleo de soja sobre o desempenho de leitões na fase de creche e observaram um efeito linear positivo no ganho diário de peso dos leitões que receberam glicerina bruta na dieta, sem, no entanto, afetar o consumo diário de ração e a conversão alimentar. A inclusão de até 30% de glicerol bruto na dieta de suínos em crescimento e terminação, segundo Kijora et al (1995), resultou em menor ganho diário de peso e pior conversão alimentar, sem, entretanto, afetar o consumo diário de ração para o maior nível.…”

Addition of crude glycerin to pig diets: sow and litter performance, and metabolic and feed intake regulating hormones

“…Several authors have evaluated the effects of adding crude glycerin to weanling (Groesbeck et al, 2008;Zijlstra et al, 2009) and growing-finishing pig diets (Kijora et al, 1995;Lammers et al, 2008a;Della Casa et al, 2009;Mendoza et al, 2010). However, studies with sows fed diets containing crude glycerin have rarely been conducted (Schieck et al, 2010a).…”

“…In our study, crude glycerin, obtained from vegetable oils, showed a high quality to be employed in animal feeding taking into account its glycerol (87.42%) and methanol (0.05%) contents. On the other hand, the effect of crude glycerin inclusion on the manufacturing process, physical aspects affecting feed intake, has been scarcely described in pigs in the literature (Groesbeck et al, 2008;Madrid et al, 2013). In this sense, the lower feed intake found in sows fed glycerin may suggest a reduction in the palatability of the diets.…”

Glicerina Bruta Nas Rações Para Leitões Na Fase De Creche

“…Com a finalidade de reduzir o custo das dietas de suínos, sobretudo o custo energético, a glicerina bruta passou a ser incluída nas rações de leitões na fase de creche (7) . Por tratar-se de um produto de sabor adocicado, com boa palatabilidade e alta digestibilidade (5,(8)(9) , podendo substituir em parte cereais (5) , como também a lactose e o soro de leite em pó (2,(10)(11) , ingredientes tradicionalmente incluídos nas dietas de pós-desmame como fontes energéticas de alta digestibilidade, é um ingrediente alternativo que poderá facilitar a transição da dieta líquida (leite da porca) para a dieta sólida. O período pós-desmama é marcado pelo consumo reduzido de alimento, mobilização de reserva energética do leitão e alterações na mucosa intestinal, que ocorrem em função da mudança da dieta, reduzindo a capacidade de digerir e absorver os nutrientes (12) .…”