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

Abstract

Four male lambs (Katahdin; average live weight 25.9±2.9 kg) with “T” type cannulas in the rumen and proximal duodenum were used in a 4×4 Latin square experiment to evaluate the influence of supplemental dry distillers grain with solubles (DDGS) levels (0, 10, 20 and 30%, dry matter basis) in substitution for dry-rolled (DR) corn on characteristics of digestive function and digestible energy (DE) of diet. Treatments did not influence ruminal pH. Substitution of DR corn with DDGS increased ruminal neutral detergent fiber (NDF) digestion (quadratic effect, p<0.01), but decreased ruminal organic matter (OM) digestion (linear effect, p<0.01). Replacing corn with DDGS increased (linear, p≤0.02) duodenal flow of lipids, NDF and feed N. But there were no treatment effects on flow to the small intestine of microbial nitrogen (MN) or microbial N efficiency. The estimated UIP value of DDGS was 44%. Postruminal digestion of OM, starch, lipids and nitrogen (N) were not affected by treatments. Total tract digestion of N increased (linear, p = 0.04) as the DDGS level increased, but DDGS substitution tended to decrease total tract digestion of OM (p = 0.06) and digestion of gross energy (p = 0.08). However, it did not affect the dietary digestible energy (DE, MJ/kg), reflecting the greater gross energy content of DDGS versus DR corn in the replacements. The comparative DE value of DDGS may be considered similar to the DE value of the DR corn it replaced up to 30% in the finishing diets fed to lambs.

The impact of feeding corn dried distillers grains with solubles on milk yield and composition in lactating Awassi ewes and digestibility and N partitioning in Awassi ewe lambs

“…The inclusion of DDGS at either 200 or 300 gkg À1 of dietary DM improved the nutrient digestibility compared with the CON diet. Similar results on improving digestibility were reported by previous studies (Firkins et al 1984;Castro-P erez et al 2013). The similarity in NDF or ADF digestibility may be a result of the availability of readily digestible non-forage fibre or the small particle size of DDGS.…”

Site and extent of digestion of nitrogen compounds and organic matter in steers fed a finishing diet with dried distillers grains plus solubles supplemented with urea

“…This value is 21% greater than the average dietary N reaching duodenum observed in this trial and could be an indicative of a greater RDP value assigned for DDGS. Previous reports (Carrasco et al 2013, Castro-Pérez et al 2013, indicate an average DDGS RDP of 39% as measured in sheep and cannulated steers fed finishing diets containing 15-30% DDGS. Using an in situ technique, Corrigan et al (2009) determined 28% RUP for DDGS.…”

“…Based on initials reports (Klopfenstein et al 1978) the current standard (NASEM 2016, former NRC which is widely used North America as reference to formulate diets for livestock in industry and experimentation), indicates that corn DDGS protein has 32% rumen degradability. However, recent reports (Carrasco et al 2013, Castro-Pérez et al 2013 indicate an average of 61% RDP in DDGS. Because the reference value of rumen degradability of DDGS is 25% lower than steam-flaked corn, when steam-flaked corn is replaced by DDGS at moderate (10-15%) to high levels (>30%) in finishing diets, the inclusion of urea in the diets is considered necessary to meet the minimum requirement of degradable protein in the rumen to achieve optimal microbial synthesis and ruminal fermentation efficiency Shen 1998, Ceconi et al 2015 a ).…”

Intake and digestibility of rations with distillery yeasts byproducts, molasses and ammoniated sugar cane tops in lambs in total confinement

“…The liquor industry uses molasses and / or cereals, not suitable for human intake to make drinks such as rum, whiskeys among others, as a by-product of the fermentative process of starches and / or reducing sugars of molasses is a mixture of yeast and unfermented material of interest in animal feed, especially in sheep and lambs, whose composition on dry basis can vary from 89.1 to 94.2% of DM, 25.4 to 49% of CP, 8.9% of EE, 41.8 to 42.7% NDF, 3.95 to 5.6% of ashes (12,13,14). Due to the need to offer rations that can cover the nutritional requirements of weaned lambs, which are exploited in dry areas, it was proposed to evaluate locally available resources, such as: sugar cane harvest residues mixed with brewer's yeast, molasses, urea, and / or sodium bicarbonate to determine its effect on the intake of rations and its digestibility in lambs confined after weaning.…”

“…West African) male lambs with an average live weight (LW) of 18.3±1.21 kg confined by consuming rations with dry distiller›s grain 30.0%, corn ground grain 51.5%, sugar cane molasses 15.0%, Premix mineral-protein 3.5% Dry matter 95.5%, Raw protein 16.7%, Nitrogen free extract 36.2%, Ethereal extract 4.0%, NDF 35, 3%, ADF 14.4%, Ashes 5.2%, achieving a DM intake of 1.120 g/day with an estimated DM degradability of 46.9%, the intake being similar to this experiment and the degradability higher than the apparent digestibility. Bonilla-Cárdenas et al(21) in Pelibuey sheep of 40 kg of average body weight, confined by consuming rations with 60.7% of corn stubble, 24.6% of dried distillers grains with solubles, 10.6% of canola, 2.1% molasses and 1.1% calcium carbonate, whose composition was 87.2% DM, 89.6% OM, 10.4% ash, 15% CP, 53.9% NDF, 30.2% % ADF and 21.8% of hemicellulose achieved intakes of 860.2 g of DM, 770.6 g of OM, 129.3 g of CP, 518 gr of NDF, 330 g of ADF and 188 g of hemicellulose per animal per day, with apparent digestibility of 67.6% DM, 47.5% OM, 63.5% CP, 34.4% NDF, 18.4% ADF and 62.4% for hemicellulose; the results of this experiment were superior in intake for most of the treatments and components analyzed, as well as for the digestibility of the OM, NDF and ADF, and lower for the digestibility of the DM, CP and hemicellulose.Castro-Pérez et al(12) using Katahdin male lambs weighing 25.9±2.9 kg, receiving rations with dry rolled corn 44.5 to 54.5%, dry distillers grains with solubles 20 to 30%, soy cake 5%, Sudan grass hay 10%, tallow 1.5 and molasses 6.1% whose final composition was CP 13.98 to 15.51%, EE 5.38 to 5.95% NDF 22.55 to 26%, 12% and GE 18.32 to 18.41 MJ / kg and with a DM intake of 684 to 689 g/d, of OM of 639 to 646 g/d and NDF of 154 to 180 g/d and digestibility of the DM from 76.7 to 74.9%, from OM 79.3 to 77.3% and from the NDF from 57.1 to 59.2%; reaching lower values of fiber intake and much higher digestibility of the same, being relatively similar in the apparent digestibility of OM, both experiences.…”