Nitrogen-corrected apparent metabolizable energy values of barley varies by treatment and species

Alahyari-Shahrasb, Majid; Moravej, H; Kianfar, Ruhollah; Kim, Woo Kyun

doi:10.3382/ps/pex001

Cited by 1 publication

(4 citation statements)

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“…Jakobsen et al [ 39 ] found that fermented RSM had no effect on the content of crude fat and ether extracts, which is in agreement with our results. Insoluble fiber and fat fractions are more resistant to fermentation than their soluble counterparts; protein and digestible starch are preferred as nutrient sources during the fermentation process [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

“…These enzymes consumed the insoluble fibers in RSM and produced soluble matters with simple structure; carbohydrate composition was modified as a result of microbial metabolism and, to some extent, due to activation of inherent enzymes in the cereal protein feedstuff [ 43 ]. In a study by Alahyarishahrasb et al [ 29 ], enzyme treatment ( β -glucanase, 0.5 g/kg) barley had significantly higher AMEn values than no enzyme treatment when fed to cockerels. Studies have shown that the addition of enzymes to chicken diets degrades endosperm cell walls, resulting in increased digestibility of nutrients, which otherwise may be encapsulated in the cell structures [ 44 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

“…The AME and AMEn values of RSM and FRSM were determined by the substitution method using the following equations [ 19 , 29 ]: ADMD = (Mconcdg − Mconfd)/Mconcdg, where ADMD means the apparent digestibility of DM in diets. Mconcdg and Mconfd are feces marker and diet marker (TiO 2 ), g/kg, DM; ME (MJ/kg) = Econfd − (1 − ADMD) × Econcdg, MEn (MJ/kg) = AMED − RN × 8.22.…”

Section: Methodsmentioning

confidence: 99%

“…The AME and AMEn values of RSM and FRSM were determined by the substitution method using the following equations [19,29]:…”

Section: Calculationsmentioning

confidence: 99%

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Effects of Fermentation on Standardized Ileal Digestibility of Amino Acids and Apparent Metabolizable Energy in Rapeseed Meal Fed to Broiler Chickens

Liu

Jiang

et al. 2020

Animals

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Rapeseed meal (RSM) is a common protein ingredient in animal diets, while the proportion of RSM in diets is limited because of its anti-nutritional factors. Fermentation based on mixed microbial strains appears to be a suitable approach to improve the nutritive value of rapeseed meal in animal feed. In this study, we evaluated the effects of fermentation on the apparent metabolizable energy (AME) values and standardized ileal digestibility (SID) of amino acids in RSM fed broilers. The AME and nitrogen-corrected apparent metabolizable energy (AMEn) values of RSM and fermented rapeseed meal (FRSM) were determined by the substitution method, with RSM and FRSM proportionally replacing the energy-yielding components of the basal diet by 30%. Results show that fermentation improved AME and AMEn of RSM from 7.44 to 8.51 MJ/kg and from 7.17 to 8.26 MJ/kg, respectively. In the second experiment, two experimental diets were formulated, with RSM and FRSM being the sole sources of amino acids. A nitrogen-free diet (NFD) was also formulated to determine endogenous amino acids losses (EAAL). Feeding on FRSM resulted in higher (p < 0.05) apparent ileal digestibility (AID) and SID of alanine, valine, isoleucine, leucine, tyrosine, lysine, arginine, and phenylalanine. No significant differences between RSM and FRSM were found for AID and SID of asparagine, histidine, threonine, serine, glutamine, praline, glycine, methionine, and cystine. FRSM had greater AMEn values and SID of amino acids compared to RSM, therefore, FRSM was nutritionally superior to RSM in broiler diets.

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Section: Discussionmentioning

confidence: 99%