Utilization of equations to predict carbohydrate fractions in some tropical grasses

Fukushima, Romualdo Shigueo; Bacha, Carolina Barbosa; Fuzeto, Adriana Paula; Port, Ana Carolina Rangel; Herling, Valdo Rodrigues; Velasquez, Alejandro Vargas

doi:10.1016/j.anifeedsci.2015.06.016

Cited by 5 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The carbohydrate pools in this study are in agreement with the values shown in the LRNS and CNCPS feed libraries. Grasses elsewhere of the same species have been found that the B1 is the smallest CHO fraction and that is made of starch mainly (39) . The NSC is a complex fraction where the starch is part of the non-fiber carbohydrates (NFC) and the pectin substances are part of the structural carbohydrates unaccounted in the B2 fraction.…”

Section: B1 Fraction = Nds -Amentioning

confidence: 95%

In vitro ruminal degradation of carbohydrate fractions in tropical grasses fertilized with nitrogen

Hernández

Lagunes

Pell

et al. 2020

Rev. Mex. Cienc. Pecu.

View full text Add to dashboard Cite

Our goal was to determine the digestion rates of carbohydrate fractions A (sugars, oligosaccharides and organic acids), B1 (starch and soluble fiber), NSC (non-structural carbohydrates) and B2 (available NDF) in four tropical grasses using the gas production technique. Samples of whole forage (WF), residue insoluble in 90% ethanol (EIR) and isolated NDF (ND) were fermented in vitro and gas production measured. Gas volumes determined from the following fractions, A = WF minus EIR; B1 = EIR - ND; NSC = WF - ND; and B2 = ND. Grasses were Andropogon gayanus, Urochloa brizantha, Cynodon plectostachyus, and Megathyrsus maximum each grown in Veracruz, Mexico on four plots (5×5 m), fertilized (relationship equivalent to 0 and 100 kg N/ha) and clipped 35 d after the N fertilization. A complete randomized block design with factorial arrangement 4×2 and two replicates per treatment was used. Factors were grass species and N fertilization. Data were fit using a single-pool exponential model with lag. The volume (mL gas/100 mg OM), rate (%/h) and lag (h) were: WF (22.8; 5.3; 2.1); A (3.2; 15.7; 0.5); B1 (1.5; 15.7; 0.2); and B2 (18.3; 6.6; 5.2). Andropogon and Urochloa had higher NSC content compared to Megathyrsus and Cynodon but lower gas yield per unit of NSC. Rates of digestion for the B2 fraction ranged from 4 to 8 %/h; and NSC digestion rate averaged 15.7 %/h. Nitrogen fertilization reduced carbohydrate pool sizes but did not affect rates of digestion. It is concluded that ruminally available energy from SC and NSC in tropical forages should be revised more extensively.

show abstract

Section: B1 Fraction = Nds -Amentioning

confidence: 95%

In vitro ruminal degradation of carbohydrate fractions in tropical grasses fertilized with nitrogen

Hernández

Lagunes

Pell

et al. 2020

Rev. Mex. Cienc. Pecu.

View full text Add to dashboard Cite

show abstract

“…According to Paiva et al (2015) and Hungria et al (2016), a broader use of Brachiaria species and/or cultivars has been possible because of their desirable features. Additionally, they are important sources of fibrous carbohydrates to provide energy to ruminants (MORAIS et al 2014, FUKUSHIMA et al 2015, ANDRADE et al 2016. Of the Brachiaria species most commonly found in Brazilian pastures, Brachiaria humidicola stands out for its rusticity and survival ability even under adverse climatic conditions.…”

Section: Introductionmentioning

confidence: 99%