Whole corn grain-based diet and levels of physically effective neutral detergent fiber from forage (pefNDF) for feedlot lambs: Digestibility, ruminal fermentation, nitrogen balance and ruminal pH

Carlis, Matheus Sousa de Paula; Sturion, Thamires U; Silva, Adrielly Lais Alves da; Eckermann, Nathalia R; Polizel, Daniel Montanher; Assis, Rhaissa Garcia de; Souza, Terezinha Teixeira de; Junior, Paulo César Gonzales Dias; Vicente, Ana Carolina Silva; Santos, Isabela Jorge dos; Comelli, Jamile Haddad; Baiva, Janaina Socolovski; Pires, Alexandre Vaz; Ferreira, Evandro Maia

doi:10.1016/j.smallrumres.2021.106567

Cited by 9 publications

(8 citation statements)

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“…Dry matter intake was lower in lambs under GS, as ruminants often reduce dry matter intake when dietary energy density decreases [44,45]. Also, the neutral detergent fiber in the GS diet contributes to the reduction in feed intake [46,47]. Lambs under FHC showed intermediary dry matter intake, which is associated with physiological, physical, or psychogenic mechanisms [48].…”

Section: Discussionmentioning

confidence: 99%

Impact of Feeding Systems on Performance, Blood Parameters, Carcass Traits, Meat Quality, and Gene Expressions of Lambs

dos Santos,

Dias Junior,

Alvarenga

et al. 2024

Agriculture

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The aim of this study was to investigate the effects of feeding systems on the growth performance of Santa Inês x Dorper lambs, meat quality, fatty acid profile, and gene expression. Thirty lambs at an initial body weight of 22.6 ± 2.59 kg were randomly assigned to one of three feed systems: a grazing system with 1.2% body weight concentrate supplementation (GS); a feedlot system with 28% forage and 72% concentrate (FFC); or feedlot with 85% whole corn grain and 15% pellets (FHG). The lambs were slaughtered after 60 days of experiment. Average daily gain, glucose, and insulin concentration were higher for lambs on FHC than lambs on a GS feeding system. The fatty acid profile in the meat of the lambs fed GS showed a higher proportion of c9t11-C18:2, C20:5, C22:5, and C22:6 compared with FFC and FHC (p < 0.05). Meat tenderness was lower for lambs under FFC treatment compared with GS and FHG. FHG treatment provides better performance and higher deposition of lipid content in meat compared with GS and FHG. The expression of the genes SCD-1, SREBP1-c, and EVOL6 was greater in lambs undergoing GS and FHC treatments compared with FFC. Results of this research showed a reduced performance of grazing lambs compared with the feedlot system; however, it enhanced the fatty acid profile with increased levels of polyunsaturated acids and reduced n6/n3 ratio.

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Section: Discussionmentioning

confidence: 99%

Impact of Feeding Systems on Performance, Blood Parameters, Carcass Traits, Meat Quality, and Gene Expressions of Lambs

dos Santos,

Dias Junior,

Alvarenga

et al. 2024

Agriculture

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“…Furthermore, 1 day was used to collect ruminal fluid. The adaptation was made by restriction according to DE PAULA CARLIS et al (2021), but instead of starting with 20 g/kg of the fasting BW, we started with 18 g/kg of the fasting BW, since the diets of the present study did not contain forage.…”

Section: Diets and Experimental Designmentioning

confidence: 99%

“…Bromatological analysis of TMR, orts, feces, and feed ingredients were analyzed according to the Association of Official Analytical Chemistry methods as described in DE PAULA CARLIS et al (2021), except ether extract (EE), which was analyzed using the Soxhlet method. Non-fiber carbohydrates (NFC) were estimated according to the equation: NFC (g/kg) =1000_ [NDF (g/kg) + CP (g/kg) + EE (g/kg) + ash (g/kg)].…”

Section: Laboratory Analyses and Calculationsmentioning

confidence: 99%

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Intake and apparent nutrient digestibility, ruminal parameters, and nitrogen balance of lambs fed with corn and forage-free diets with sodium bicarbonate

et al. 2023

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This study evaluated forage-free diets supplemented with sodium bicarbonate (SB) based on ground flint corn on intake, apparent nutrient digestibility, ruminal parameters, and N balance. Four rumen-cannulatedDorper × Santa Inês lambs, with a body weight of 43.4 ± 0.85 kg (mean ± standard deviation) were used. The experimental design was a 4×4 Latin square. Each experimental period lasted 21 days. Experimental diets were: positive control, a diet without SB containing 400 g/kg DM of soybean hulls (CONT), and three diets based on ground flint corn, containing 10 (10SB), 20 (20SB) or 30 (30SB) g/kg DM of SB. Intake of neutral and acid detergent fiber was greater for CONT (P < 0.01) when compared to SB. Intake and apparent nutrient digestibility of dry and organic matter, ether extract, and crude protein did not differ. Intake (P = 0.01) and digestibility (P < 0.01) of non-fiber carbohydrates were greater for SB diets and neutral detergent fiber digestibility was greater (P = 0.03) for CONT. The total digestible nutrients and metabolizable energy were greater for SB (P = 0.04). Rumen concentrations of acetate (P < 0.01), isobutyrate (P < 0.01), butyrate (P < 0.01), isovalerate (P < 0.01), and total short-chain fatty acids (P < 0.01) were greater for CONT. Ruminal pH showed a quadratic (P = 0.05) response to SB levels, with greater values for 20SB. Sodium bicarbonate was efficient in increasing ruminal pH at the level of 20 g/kg DM without interfering with the intake and apparent nutrient digestibility characteristics.

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“…However, the effects of dietary peNDF levels on nutrient digestibility are not consistent in the literature. Several recent studies revealed that the increase of dietary peNDF content could reduce the total tract apparent digestibility of dry matter (DM), crude protein (CP), and NDF in dairy cattle (Soita et al, 2002 ; Molavian et al, 2020 ) and lambs (de Paula Carlis et al, 2021 ). Other studies found that the nutrients digestibility was quadratically related to dietary peNDF content (Zhao et al, 2011 ; Wang et al, 2017 ), or not affected by peNDF (Oh et al, 2016 ; Jang et al, 2017 ; Kaeokliang et al, 2019 ; Li et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of dietary peNDF levels on digestibility and rumen fermentation, and microbial community in growing goats

Zhou

Xue

et al. 2022

Front. Microbiol.

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Physically effective neutral detergent fiber (peNDF) is a concept that accounts for the particle length of NDF in diets, sustaining the normal chewing behavior and rumen fermentation of ruminants. Specifically, peNDF>1.18 is the commonest one that is calculated from NDF and the percentage of feed dry matter left on the 1.18, 8.00, and 19.00 mm sieves. This study aimed to investigate the effects of different levels of peNDF>1.18 on the rumen microbiome and its correlation with nutrient digestibility and rumen fermentation in goats. A total of 30 Lezhi black goats were randomized and blocked to five dietary treatments (n = 6). All the diets were identical in composition but varied in hay lengths, leading to the different peNDF>1.18 content of the diets: 32.97, 29.93, 28.14, 26.48, and 24.75%. The results revealed that the nutrient digestibility increased when dietary peNDF>1.18 levels decreased from 32.97% to 28.14%, with the highest digestibility at 28.14% peNDF>1.18 treatment, after which nutrient digestibility decreased with the decreasing of dietary peNDF levels. Ruminal NH3-N concentrations in the 29.93% and 28.14% groups were higher than that in the 24.75% group (p < 0.05). Ruminal microbial protein concentration was the highest in the 32.97% group (p < 0.05). Daily CH4 production in the 32.97% and 24.75% peNDF>1.18 treatments was lower than that in the 26.48% group (p < 0.05) and no differences were observed among other groups. The relative abundance of rumen fungi at the phylum and genus levels and archaea at the species were affected by dietary peNDF>1.18 content. In conclusion, decreasing dietary peNDF>1.18 levels within a certain range can improve nutrient digestibility and change the rumen microbial community structure of goats. Dietary peNDF>1.18 level should be 28.14% (roughage length around 1 cm) among the five levels for 4 months Lezhi black goats with the purpose of optimal nutrient digestibility.

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Whole corn grain-based diet and levels of physically effective neutral detergent fiber from forage (pefNDF) for feedlot lambs: Digestibility, ruminal fermentation, nitrogen balance and ruminal pH

Cited by 9 publications

References 30 publications

Impact of Feeding Systems on Performance, Blood Parameters, Carcass Traits, Meat Quality, and Gene Expressions of Lambs

Impact of Feeding Systems on Performance, Blood Parameters, Carcass Traits, Meat Quality, and Gene Expressions of Lambs

Intake and apparent nutrient digestibility, ruminal parameters, and nitrogen balance of lambs fed with corn and forage-free diets with sodium bicarbonate

Effect of dietary peNDF levels on digestibility and rumen fermentation, and microbial community in growing goats

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