Brown Silage from Atlas Sorgo—Chemical Composition, and Apparent Digestibility as Determined by Feeding to Dairy Cows

Bechtel, H. Ernest; Atkeson, F.W.; Hughes, J. S.

doi:10.2527/jas1943.24295x

Cited by 6 publications

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“…Proteins are denatured by high temperatures and may have lower solubility and rates of degradation in the rumen and may be unavailable for ruminal digestion . It has been well documented that apparent protein digestibility and animal performance decrease when animals consume heated forages (Bechtel et al, 1943;Bratzler et al, 1960;Wieringa et al, 1961;Hill and Noller, 1963;Goering et al, 1973). However, several studies have demonstrated that variable amounts of ADIN, particularly found in concentrate sources, can provide amino acids postruminally (Nakamura et al, 1994;Klopfenstein, 1996;Schwab et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of protein fractionation and ruminal and intestinal digestibility of corn milling co-products

Kelzer

Kononoff

Tedeschi

et al. 2010

Journal of Dairy Science

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Novel corn milling co-products developed from technological advancements in ethanol production vary widely in chemical composition and nutrient availability. The objectives of this study were to characterize feed protein fractions and evaluate differences in rumen-undegradable protein (RUP) and its digestible fraction (dRUP), amino acid concentration, and in vitro gas production of 7 corn milling co-products. The crude protein (CP; % of dry matter) of co-products was 12.7 for germ, 26.9 for dried distillers grains plus solubles that had no heat exposure before fermentation (DDGS1), 45.4 for highprotein dried distillers grains (HPDDG), 12.7 for bran, 30.2 for wet distillers grains plus solubles (WDGS), 23.1 for wet corn gluten feed (WCGF), and 26.0 for dried distillers grains plus solubles that had heat exposure before fermentation (DDGS2). Two ruminally and duodenally fistulated Holstein steers weighing 663 ± 24 kg were used to determine RUP and dRUP with the in situ and mobile bag techniques. Samples of each feed were ruminally incubated for 16 h, and mobile bags were exposed to simulated abomasal digestion before insertion into the duodenum and subsequent collection in the feces. Protein fractions A, B 1 , B 2 , B 3 , and C were characterized as follows (% CP): germ = 30.0, 15.0, 38.1, 13.5, 3.4; DDGS1 = 17.0, 7.0, 67.0, 4.8, 4.2; 0.6, 82.4, 8.8, 0.8; bran = 33.5, 4.0, 54.3, 6.0, 2.2; WDGS = 18.6, 2.4, 53.1, 11.0, 14.9; WCGF = 36.6, 15.9, 33.2, 10.1, 4.1; and DDGS2 = 17.9, 2.1, 41.1, 11.1, 27.9. The proportions of RUP and dRUP were different and are reported as follows (% CP): DDGS2 = 56.3, 91.9; HPDDG = 55.2, 97.7; WDGS = 44.7, 93.1; DDGS1 = 33.2, 92.1; bran = 20.7, 65.8; germ = 16.5, 66.8; and WCGF = 11.5, 51.1. The concentrations of Lys and Met in the RUP were different and are listed as follows (% CP): germ = 2.9, 2.0; DDGS1 = 1.9, 2.0; HPDDG = 2.0, 3.2; bran = 3.2, 1.5; WDGS = 1.9, 2.3; WCGF = 3.5, 1.6; and DDGS2 = 1.9, 2.4. In vitro gas production (mL/48 h) was highest for germ (52.1) followed by bran (50.1), WDGS (40.7), DDGS2 (40.1), WCGF (39.0), DDGS1 (38.6), and HPDDG (37.5). Comparison of co-products defined differences in chemical composition, protein fractionation, ruminal availability, and microbial fermentation.

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Section: Discussionmentioning

confidence: 99%

Evaluation of protein fractionation and ruminal and intestinal digestibility of corn milling co-products

Kelzer

Kononoff

Tedeschi

et al. 2010

Journal of Dairy Science

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ASAS Centennial Paper: Utilization of pasture and forages by ruminants: A historical perspective1

Burns

2008

Journal of Animal Science

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Pastures, forages, and grasslands dominate the landscape across the United States and support a large ruminant population that supplies the nation with value-added animal products. A historical perspective is presented of the innovations as they occurred in the Journal of Animal Science over the past 100 yr in pasture and forage research. Consideration was given to both animal and pasture perspectives. Areas given consideration from the animal perspective were schemes for feedstuff analysis, experimental design and statistics, forage sample preservation, indirect methods of measuring intake and digestion, TDN and energy, nutritive value, harvested forage, and innovations in the grazing environment. Areas given consideration from the forage perspective were a framework for forage-animal interface research, determining pasture yield, choice of stocking method, grazing management, partitioning of forage DM, near-infrared reflectance spectroscopy technology, antiquality constituents, and forage sample preservation. Finally, the importance was discussed of applying research results from the forage-animal interface to general ruminant nutrition research beyond the interface that is focused on altered diets.

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Factors Affecting Nutritive Value of Corn and Sorghum Silage

Owen

1967

Journal of Dairy Science

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Brown Silage from Atlas Sorgo—Chemical Composition, and Apparent Digestibility as Determined by Feeding to Dairy Cows

Cited by 6 publications

References 0 publications

Evaluation of protein fractionation and ruminal and intestinal digestibility of corn milling co-products

Evaluation of protein fractionation and ruminal and intestinal digestibility of corn milling co-products

ASAS Centennial Paper: Utilization of pasture and forages by ruminants: A historical perspective1

Factors Affecting Nutritive Value of Corn and Sorghum Silage

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