Wet corn distillers byproducts compared with dried corn distillers grains with solubles as a source of protein and energy for ruminants

Abstract

Five trials investigated the feeding value of wet and dried corn distillers byproducts as a source of protein and energy for growing and finishing cattle and investigated the effect of heat damage on the feeding value of dried distillers byproducts. In a calf growth trial, no differences in rate of gain or protein efficiency were observed among calves fed wet distillers byproducts (wet distillers grains + thin stillage; WDB) or one of three composites of dried distillers grain + solubles (DDGS) having a low, medium, or high concentration of ADIN. A finishing trial compared the energy value of dry-rolled corn (DRC) with WDB or the three DDGS composites, fed at 40% of the diet DM replacing DRC. Cattle consuming WDB or DDGS gained faster (P < .05) and more efficiently (P < .05) than cattle fed DRC. Although gains were similar, cattle fed WDB consumed less feed (P < .10) and were more efficient (P < .10) than cattle fed DDGS. Level of ADIN in DDGS did not affect efficiency of gain (P > .10). In a lamb finishing trial, the addition of 5 or 10% ethanol did not affect (P > .10) daily gain, DMI, or feed efficiency. In two metabolism trials with steers, grain byproducts (wet distillers grains, dry distillers grains plus solubles, wet corn gluten feed, dry corn gluten feed, hominy feed) and DRC had similar effects on ruminal pH and total VFA. Feeding thin stillage or condensed solubles reduced (P < .10) ruminal pH and tended to reduce acetate:propionate. Wet corn distillers byproducts, fed at 40% of the diet DM, contain more NEg than did DRC and drying WDB reduces its NEg content. Acid detergent insoluble N is a poor indicator of protein and energy value in distillers grains.

Feeding wet distillers grains plus solubles contributes to sarcoplasmic reticulum membrane instability

“…Modification of beef SR membrane fatty acid profiles by feeding WDGS likely occurred by the same mechanism that modification of beef muscle fatty acid profiles occurs. Although the majority of the unsaturated fatty acids in the diet were biohydrogenated to saturated fatty acid (SFA) by the rumen microflora, WDGS has double the amount of corn oil (Ham et al 1994) compared with corn, which led to greater deposition of 18 : 2 and PUFA in the (Wood et al 2008;Smith et al 2006). Perhaps, the 0% WDGS steers needed to generate more MUFA from SFA because less PUFA was available in the plasma to incorporate in the organelle membrane.…”

Effects of moist heat treatment on crude protein composition and degradability of field peas

“…Rumen undegraded CP (RUP) was calculated as the ratio of residual CP from the 12-h rumen incubation to the original CP (Ham et al 1994). Post-ruminal availability of RUP was determined following the in vitro three-step procedure of Calsamiglia and Stern (1995).…”

Effect of Decreasing the Maize Content of Feed on Growth Performance, Rumen pH, and Blood Chemistry in Grain-Fed Holstein Bull Calves

“…Towards the end of the growing phase, ADG, G/F ratio and rumen pH were similar, while DMI decreased among calves fed MSD diet compared to MS. Ham et al (1994) reported that inclusion of 20 % wet corn distillers' grain plus soluble matter or DDGS in a dry-rolled-maizebased feed increased DMI and ADG in crossbred beef calves of similar body weight. Buckner et al (2007) also reported an improved grow thin finishing steers when 20 % of the feed was replaced with DDGS.…”

“…Compared to whole barley, maize has been found to improve growth performance and feed digestibility in grainfed calves (Noon et al, 1998;Ham et al, 1994) found that replacing dry-rolled maize with up to 40 % DDGS reduced acidosis and improved growth performance in steers. Similar results were found by Buckner et al (2007), who obtained the greatest improvement when dry-rolled maize was replaced with 20 % DDGS in comparison with rolled barley and canola meal.…”