Does the length of time dried distillers' grain with solubles substitution for soybean meal affect physiological indicators and meat quality in finishing lambs?

Abstract

This study examined how inclusion of dried distillers' grains with solubles (DDGS) in finishing lamb diets for different periods affects some physiological indicators and meat quality. A total of 40 male lambs were divided into four groups according to feeding regimen during the 120‐day finishing period as follows: C120: no DDGS included in diet for 120 days; D120: DDGS included in diet for 120 days; D75: no DDGS included in diet for 45 days + DDGS included in diet for 75 days; D45: no DDGS included in diet for 75 days + DDGS included in diet for 45 days. Dietary inclusion rate of DDGS was 27.5%. Fattening performance and rumen parameters were not affected by treatment. Feeding regimens had no significant effect on meat quality except the instrumental tenderness and juiciness score. DDGS fed lambs had higher level of total trans fatty acids and n‐6/n‐3 ratio in meat. 10t‐C18:1, 11t‐C18:1 and 9c,11t conjugated linoleic acid contents of adipose tissue were higher in all the DDGS groups compared with C120 lambs (p < .001). These results suggest that soybean meal can be replaced with corn DDGS in lamb diets for up to 120 days during the finishing period with no adverse effects on some physiological response feedlot performance and meat quality.

Replacing cottonseed meal and sorghum with dried distillers’ grains with solubles enhances the growth performance, carcass traits, and meat quality of feedlot lambs

“…Linoleic acid, which is a PUFA and part of the ω-6 family, quadratically ( P = 0.01) increased with DDGS levels, agreeing with Kawęcka et al (2018) and Karaca et al (2021) . The utilization of DDGS in ruminant diets usually leads to the modification of meat FA profile since some FA may be protected from biohydrogenation ( Vander Pol et al, 2009 ; Whitney and Braden, 2010 ; Giotto et al, 2020 ).…”

“…The chemical composition of the DDGS and diets is presented in Table 1 , and the FA profiles of DDGS, CSM, SG, and diets are presented in Table 2 . The DDGS is an advantageous feed because it can substitute traditional protein (i.e., SBM, CSM; Hoffman and Baker, 2011 , Castro-Pérez et al, 2014 ; Karaca et al, 2021 ) and high-energy containing (i.e., corn, SG; Klopfenstein, 1996 ; Hodges et al, 2020a ) feedstuffs in livestock diets; however, its composition can vary considerably depending on the processing method ( Böttger and Südekum, 2018 ). The CP variability in the diets was due to a greater CP content in the DDGS compared with SG ( Trujillo et al, 2016 ), as the CSM CP levels were low ( Table 1 ).…”

“…In the last 15 years, the dried distillers’ grains with solubles (DDGS) supply in the U.S. has increased approximately 3.5-fold, reaching 35 million metric tons in 2020/2021 ( USDA, 2021 ). Due to its crude protein (CP; 26%–33%; Liu, 2011 ) and energy contents (89.7% of total digestible nutrients, TDN; Nuez Ortín and Yu, 2009 ) as well as its lower relative costs ( Alshdaifat and Obeidat, 2019 ), DDGS has been included in animal diets to replace traditional feedstuffs such as soybean meal (SBM) and corn ( Klopfenstein, 1996 ; Hoffman and Baker, 2011 ; Karaca et al, 2021 ). Cottonseed meal (CSM) and sorghum grain (SG) are common feed ingredients used in livestock diets that can also be replaced by DDGS in small ruminant production systems, notably for fattening lambs ( Whitney and Braden, 2010 ; Hodges et al, 2020a ).…”

Effects of dietary inclusion of dry distillers grains with solubles on performance, carcass characteristics, and nitrogen metabolism in meat sheep: a meta-analysis

“…Positive values in RMD indicate an increase by the addition of DDGS, whereas negative values in RMD indicate a decrease by the addition of DDGS with respect to the control. 1 Total number of comparisons. 2 No DDGS in the diet.…”

“…In ruminant feeding systems, using agro-industrial byproducts, such as dry distillers grains with solubles (DDGS), has long been a practice. Dry distillers grains with solubles are the main byproduct of the manufacturing of ethanol from corn ( 1 ), and its popularity is growing around the world ( 2 ). Feed prices have increased, resulting in lower revenue and profit for farmers ( 3 ).…”