In vitro evaluation of the effects of steam-flaking conditions on starch availability of barley grain

Johnson, Jim; Burakowska, K.; Radke, Lars

doi:10.15232/aas.2020-2000

Cited by 4 publications

(3 citation statements)

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“…The PI (expressed in OM and DM) and percent fine particles (< 1.18 mm) for each batch processed (dry-rolled coarse, dry-rolled fine, tempered coarse and tempered fine) were recorded throughout the study. Kernel characteristics (width, thickness, and length) were determined using 10 randomly selected kernels from each source in each period according to Zinn (1993) and Johnson et al (2020). Amyloglucosidase reactive soluble starch (AGR) and amylase reactive insoluble starch (ARIS) were analyzed according to Zinn (1990) and Rodríguez et al (2001).…”

Section: Animals and Experimental Designmentioning

confidence: 99%

“…Insoluble starch that was potentially digestible (ISD, %) was calculated as (100 -AGR) × ((IRS) / (IRS + 0.06)), where 0.06 represents passage rate of grain from the rumen as estimated by Ørskov and McDonald (1979). Predicted ruminal starch digestion (PRSD, %) was calculated as (1.32 × AGR) + (0.93 × ISD), with the maximum value set at 100% according to Johnson et al (2020). In addition, 7-h in vitro starch digestibility was determined at Cumberland Valley Analytical Services (Waynesboro, PA) as described by Johnson et al (2020).…”

Section: Animals and Experimental Designmentioning

confidence: 99%

“…Predicted ruminal starch digestion (PRSD, %) was calculated as (1.32 × AGR) + (0.93 × ISD), with the maximum value set at 100% according to Johnson et al (2020). In addition, 7-h in vitro starch digestibility was determined at Cumberland Valley Analytical Services (Waynesboro, PA) as described by Johnson et al (2020).…”

Section: Animals and Experimental Designmentioning

confidence: 99%

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Effect of processing method and severity for hybrid fall rye on dry matter intake, ruminal fermentation, and apparent total tract nutrient digestibility in ruminally cannulated beef heifers

Pereira

Johnson

Brattain³

et al. 2022

Can. J. Anim. Sci.

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This study compared dry-rolled and tempered hybrid rye when processed to a coarse or fine severity on dry matter intake (DMI), ruminal fermentation, and apparent total tract nutrient digestibility for beef cattle. Eight ruminally cannulated Simmental heifers (327 ± 33.1 kg, mean ± SD) were used in a replicated 4 × 4 Latin square (21-day periods with 16 days for adaptation and 5 d collection) balanced for carry-over effects with a 2 × 2 factorial arrangement of treatments. Feeding tempered rye increased ( P = 0.01) DMI when compared to dry-rolled rye, but there was no effect of processing severity. Cattle fed dry-rolled rye had a greater ( P = 0.04) area that pH was <5.5 when compared to those fed tempered rye. Feeding dry-rolled rye increased dry matter digestibility ( P = 0.02) and crude protein digestibility ( P = 0.01) when compared to tempered rye, and there was a greater effect to increase total tract starch digestibility with increasing severity of processing for tempering than for dry rolling (interaction, P = 0.03). In conclusion, tempered hybrid rye processed to a fine severity may result in similar total tract starch digestibility to dry-rolled hybrid rye without the marked reductions in DMI and ruminal pH.

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Section: Animals and Experimental Designmentioning

confidence: 99%

Section: Animals and Experimental Designmentioning

confidence: 99%

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Effect of processing method and severity for hybrid fall rye on dry matter intake, ruminal fermentation, and apparent total tract nutrient digestibility in ruminally cannulated beef heifers

Pereira

Johnson

Brattain³

et al. 2022

Can. J. Anim. Sci.

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Operational conditions and potential benefits of grains micronization for ruminant: A review

Sajjadi

Ebrahimi

Vakili

et al. 2022

Animal Feed Science and Technology

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Effects of feeding hybrid rye grain as a replacement for barley grain on dry matter intake, ruminal fermentation, and the site and extent of nutrient digestion in finishing beef heifers

Zhang,

Carey,

Brattain

et al. 2024

Journal of Animal Science

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The objective of this study was to evaluate effects of increasing the inclusion of dry-rolled hybrid rye (HR) as a replacement for dry-rolled barley grain (DRB) on feed intake, ruminal fermentation, and the site and extent of nutrient digestion for finishing cattle. Eight ruminally and duodenally cannulated Hereford-cross heifers were used in a replicated 4×4 Latin square design with 21-d periods including 15 d of dietary adaptation and 6 d of data and sample collection. Dietary treatments included a control diet with 10.00% grass hay, 85.21% DRB, 4.51% of a vitamin and mineral supplement, and 0.28% of urea on a dry matter (DM) basis. Hybrid rye grain replaced 33, 67, or 100% of the DRB. Feed ingredients, feed refusals, ruminal pH, ruminal fluid, duodenal digesta, and fecal samples were collected from d 18 to 21 in each period. Data were analyzed using the Proc Glimmix procedure of SAS 9.4 (SAS Inst. Inc., Cary, NC) to evaluate the linear, quadratic, and cubic effects of increasing HR inclusion. Increasing HR inclusion as a substitute for DRB linearly decreased (P < 0.01) DM intake, linearly decreased mean pH (P < 0.01), and increased the duration (P < 0.01) and area (P = 0.02) that pH was <5.5. There were no effects of HR inclusion on total short chain fatty acid and lactic acid concentrations. Likewise, the molar proportions of acetate and butyrate were not affected by HR inclusion. Propionate was cubically affected by HR inclusion (P = 0.02). Ruminal ash-free neutral detergent fiber (aNDFom) digestibility linearly increased (P = 0.03) with increasing HR, but there was no effect on ruminal starch digestibility averaging 71.1% (SEM = 3.611). Increasing HR inclusion linearly increased intestinal DM digestibility (% of flow to the duodenum; P = 0.03), tended to linearly increase intestinal digestibility of organic matter (P = 0.08), and tended to quadratically affect intestinal digestibility of aNDFom (P = 0.07). Increasing hybrid rye linearly increased apparent total tract DM, organic matter, crude protein, aNDFom, and starch digestibility (P ≤ 0.05). In addition, increasing HR inclusion linearly increased GE digestibility (P < 0.01) and DE concentration (P < 0.01). Increasing the inclusion rate of HR grain as a substitute for DRB in finishing diets may decrease DMI and increase risk for low ruminal pH, which may be influenced by greater digestible energy concentration arising from greater DM, OM, aNDFom, and starch digestibility.

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In vitro evaluation of the effects of steam-flaking conditions on starch availability of barley grain

Cited by 4 publications

References 0 publications

Effect of processing method and severity for hybrid fall rye on dry matter intake, ruminal fermentation, and apparent total tract nutrient digestibility in ruminally cannulated beef heifers

Effect of processing method and severity for hybrid fall rye on dry matter intake, ruminal fermentation, and apparent total tract nutrient digestibility in ruminally cannulated beef heifers

Operational conditions and potential benefits of grains micronization for ruminant: A review

Effects of feeding hybrid rye grain as a replacement for barley grain on dry matter intake, ruminal fermentation, and the site and extent of nutrient digestion in finishing beef heifers

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