Effects of corn condensed distillers solubles supplementation on ruminal fermentation, digestion, and in situ disappearance in steers consuming low-quality hay1

Abstract

Two metabolism (4 x 4 Latin square design) experiments were conducted to evaluate the effects of corn condensed distillers solubles (CCDS) supplementation on intake, ruminal fermentation, site of digestion, and the in situ disappearance rate of forage in beef steers fed low-quality switchgrass hay (Panicum virgatum L.). Experimental periods for both trials consisted of a 9-d diet adaptation and 5 d of collection. In Exp. 1, 4 ruminally and duodenally cannulated steers (561 +/- 53 kg of initial BW) were fed low-quality switchgrass hay (5.1% CP, 40.3% ADF, 7.5% ash; DM basis) and supplemented with CCDS (15.4% CP, 4.2% fat; DM basis). Treatments included 1) no CCDS; 2) 5% CCDS; 3) 10% CCDS; and 4) 15% CCDS (DM basis), which was offered separately from the hay. In Exp. 2, 4 ruminally and duodenally cannulated steers (266.7 +/- 9.5 kg of initial BW) were assigned to treatments similar to Exp. 1, except forage (Panicum virgatum L.; 3.3% CP, 42.5% ADF, 5.9% ash; DM basis) and CCDS (21.6% CP, 17.4% fat; DM basis) were fed as a mixed ration, using a forage mixer to blend the CCDS with the hay. In Exp. 1, ruminal, postruminal, and total tract OM digestibilities were not affected (P = 0.21 to 0.59) by treatment. Crude protein intake and total tract CP digestibility increased linearly with increasing CCDS (P = 0.001 and 0.009, respectively). Microbial CP synthesis tended (P = 0.11) to increase linearly with increasing CCDS, whereas microbial efficiency was not different (P = 0.38). Supplementation of CCDS to low-quality hay-based diets tended to increase total DM and OM intakes (P = 0.11 and 0.13, respectively) without affecting hay DMI (P = 0.70). In Exp. 2, ruminal OM digestion increased linearly (P = 0.003) with increasing CCDS, whereas postruminal and total tract OM digestibilities were not affected (P > or = 0.37) by treatment. Crude protein intake, total tract CP digestibility, and microbial CP synthesis increased (P < or = 0.06) with increasing level of CCDS supplementation, whereas microbial efficiency did not change (P = 0.43). Ruminal digestion of ADF and NDF increased (P = 0.02 and 0.008, respectively) with CCDS supplementation. Based on this data, CCDS used in Exp. 2 was 86.7% rumen degradable protein. The results indicate that CCDS supplementation improves nutrient availability and use of low-quality forages.

The value of protein-rich supplements on the performance of Red Chittagong heifers (Bos indicus) fed urea molasses straw-based diet

“…Protein provided in supplements likely alleviated an ammonia nitrogen deficiency in rumen and thereby promoted DM and OM digestibility in the present study. Highest digestibility of CP in 25% CP group in the present study is in agreement with the previous findings (Gilbery et al 2006;Valkeners et al 2008). Increased digestible CP content of diets is due to the fact that increased CP concentration in supplements increased the rate of digestibility and availability of CP in the diets.…”

“…However, Gleghorn et al (2004) reported no response in DM intake due to the concentration of CP in the diet. Intake of CP increased progressively with increasing CP levels of supplements, which correspond well with other findings (Richards et al 2006;Gilbery et al 2006). Increased CP in the diet is a reflection of the increase in dietary N supplied in rumen which enhanced digestibility, and flow rate of digesta is attributed to higher roughage intake.…”

“…Providing supplements with relatively high protein concentrations to ruminants consuming low-quality roughage has been shown to enhance roughage utilization and livestock performance (Bodine et al 2001;Gilbery et al 2006). Austin (2001) reported increased dry matter (DM) intake, average daily gain (ADG) and feed efficiency of heifers with increasing crude protein (CP) levels in the supplements.…”

Effects of Replacing Dry-rolled Corn with Increasing Levels of Corn Dried Distillers Grains with Solubles on Characteristics of Digestion, Microbial Protein Synthesis and Digestible Energy of Diet in Hair Lambs Fed High-concentrate Diets

“…High variation in UIP values may be due to the source and method of processing (Gunn et al, 2009; Hersom et al, 2010), and the proportion of solubles returned to grain solid residues in the DDGS mixture (Cao et al, 2009). Gilbery et al (2006) observed that at least 87% of the N in corn distiller solubles was degraded in the rumen.…”

Consumo, digestibilidade dos nutrientes e parâmetros ruminais em ovinos alimentados com rações contendo grão seco de destilaria com solúveis

“…O tempo obtido para o valor de máximo médio pH do líquido ruminal estimado pela equação coincide com os dados observado na Tabela 5, em que o valor máximo médio observado foi de 6,70, este valor foi observado para o tempo antes 8h após a alimentação, além do tempo de 0 h antes da alimentação da manhã (Tabela 5). Na avaliação da inclusão de até 15% de grão de milho condensado de destilaria na alimentação de novilhos, GiLberY et al (2006) não observaram efeito do resíduo de destilaria sobre o valor de pH do líquido ruminal com valor médio de 6,80 e uma amplitude de variação de 6,70 a 6,90. Os autores concluíram que a inclusão de 15% de grão de milho condensando de destilaria com solúveis não altera o pH do liquido ruminal.…”