In sacco NDF degradability and mineral release from selected forages in the rumen

Čerešňáková, Z.; Fl’ak, P.; Poláčiková, M.; Chrenková, M.

doi:10.17221/4173-cjas

Cited by 8 publications

(2 citation statements)

References 11 publications

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“…This is made possible because the mineral content in feedstuffs is, in general, high (Playne et al 1978). Mineral bioavailability in feedstuffs is affected by the mineral distribution in plant cells, the form of the mineral, association with cell components, and interaction with other minerals (Čerešňáková et al 2005; Pogge et al 2014; Berrett et al 2015). Mineral availability in the rumen depends on mineral content, fibre content and passage rate (Flachowsky & Grün 1992; Berrett et al 2015).…”

Section: Introductionmentioning

confidence: 99%

In situ and in vitro estimation of mineral release from common feedstuffs fed to cattle

et al. 2017

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SUMMARYThe objective of the current study was to quantify the dry matter (DM) digestibility, and total ash (TA) and mineral release from 12 concentrate and 12 forage feedstuffs commonly fed to cattle using in situ and in vitro methods. Concentrate and forage feedstuffs were incubated in the rumen of ruminally cannulated beef bulls at eight different time points. Two different trials were conducted for concentrates and forages, with maximum incubation time of 72 and 120 h, respectively. The residue from samples incubated for 24 h were treated with pepsin and hydrochloric acid to simulate abomasum digestion in vitro. The initial and residual samples after in situ and in vitro incubations were measured. An asymptotic model was adopted for estimating solubility of minerals, disappearance rate of DM, and TA. Correlations between feedstuff contents and mineral release were evaluated. Residual samples from rumen fermentation after 24 h were incubated in simulated abomasal conditions and mineral release was measured. Cluster analysis was performed to group feedstuffs in relation to TA release. Large variability was observed between concentrate and forage feedstuffs for all constituents analysed. Large variability was observed for the effective ruminal degradation of TA and individual mineral release. When feedstuffs were clustered according to the immediately soluble fraction (‘a’), the insoluble by potentially releasable fraction (‘b’) and the release rate of ‘b’ (‘kd’,/h) estimates of TA ruminal release, four groups were identified. From group ‘1’ to group ‘4’, an increase in the soluble fraction and a reduction in both moderate releasable fraction and release rate was observed. Neutral detergent fibre content had a negative correlation with mineral release in the rumen, while mineral content had a positive correlation. These results demonstrate that mineral solubilization in the digestive tract is not the limiting factor for mineral absorption from the feedstuffs tested.

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Section: Introductionmentioning

confidence: 99%

In situ and in vitro estimation of mineral release from common feedstuffs fed to cattle

et al. 2017

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“…Many papers describe the determination of degradability of nutrients from feeds at different phenological stages in fresh and ensiled matter (Čerešňáková et al, 2005Niwinska et al, 2005;Jančík et al, 2008). NDF degradability was studied by an in sacco method.…”

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Changes in methane release from organic matter passing through the digestive tract of horses

Kolář¹,

Maršálek²,

Frelich³

et al. 2009

CZECH J ANIM SCI

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ABSTRACT:Using the tests of methanogenic activity (TMA) changes in methane yield (Y CH4 ) and anaerobic degradability (D c ) of organic matter of feeds and excrements were studied in an experimental group of six horses while complete analytical methods were applied (N-compound matters, proteins, non-protein N-compound matters, fat, nitrogen-free extract, ash, crude fibre, organic matter, NDF, ADF, hemicelluloses, cellulose, lignin and chemical oxygen demand COD) and the material balance was determined. The horses utilised 48.8% of organic matter of feeds in dry matter while the daily weight of droppings was 21 kg with 5.20% of dry matter and 4 kg of urine with 7% of organic matters. It is important that the theoretical methane yield per 24 hours corresponding to the organic matter of ingested feeds which was transferred to excrements is 1.771 m 3 CH 4 at 0°C and 1 013.25 hPa while the actual daily methane yield of droppings is 1.739 m 3 CH 4 at 0°C and 1 013.25 hPa, i.e. practically identical, because the yield from urine organic matters was not included in the actual daily methane yield. Because the anaerobic degradability of the used feed mixture and horse droppings is practically identical, it is obvious that besides the enteric fermentation according to the reaction CO 2 + 4 H 2 → CH 4 + 2 H 2 O by hydrogenotrophic methanogens no classical anaerobic digestion takes place in the digestive tract of horses; it means that the horse breeding sector is not a factor contaminating the atmosphere by methane.

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In sacco macromineral release from selected forages

Čerešňáková¹,

Fl’ak²,

Poláčiková³

et al. 2007

CZECH J ANIM SCI

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Solubilization and release of mineral elements from feedstuffs are important processes for their utilisation by animals (Khorasani and Armstrong, 1990). According to Playne et al. (1978), the elements not released from feedstuffs in nylon bags after 48 h incubation in the rumen are probably unavailable for absorption to the animal. The location of mineral elements in the forage structure may influence their release (Van Eys and Reid, 1987;Emanuele and Staples, 1990;Gralak et al., 1997;Islam et al., 2001). High proportions (> 60%) of K and Mg were released during short incubation in the rumen. Ca had the lowest disappearance. Flachowsky et al. (1994) reported that Ca release was dependent on the type of feedstuff and incubation time. Disappearance of elements from the bags in the rumen depends on mineral content and fibre content of incubated feeds (Flachowsky and Grün, 1992).The objective of the present study was to compare the release of selected macrominerals from different types of forages in times of their incubation in the rumen by an in sacco method. MATERIAL AND METHODS In sacco methodTo study the release of mineral macroelements we used the following forages: lucerne hay from the 1 st cut (LH1) and 2 nd cut (LH2), two hybrids of orchard grass (Rela hybrid GR and Niva hybrid GN), red clover silage treated with the chemical Kofasil (CSKO) and biological conserving agent Feedtech (CSFT) and grass silage (GS). A meadow sward composed of 80% grass (with a dominant portion of Dactylis glomerata, and Festuca pratensis, Poa pratensis, etc.), 15% herbs (Taraxacum officinale) and 5% clover (Trifolium repens) was used for ensiling.An in sacco method was used to study the release of mineral elements from forages. Incubation of forages was done in the rumen of 3 young bulls (average live weight 350 kg) with large rumen cannulas (inner diameter 10 cm). The animals were fed a ration consisting of lucerne hay, maize silage, cereal meal and mineral and vitamin feed additive. Access to water was ad libitum. , and large differences (P < 0.01) were also in the element release in the rumen between experimental forages. The lowest DM effective degradability was determined for grass forages (49.5%-51.5%) and forages from legumes had higher degradability (62.9%-67.1%). The extent of disappearance of macroelements was also higher from LH1, CSFT, CSKO than from G and GS. The release of individual elements in all incubation times is expressed very well by cubic polynomials. Maximum disappeared portions of individual minerals from forages are as follows: Ca 86.3% and Mg 93.2% from CSFT, Na 98.7% from GN and K > 98% from all feeds. Potassium solubility is rapid and is not affected by the incubation time.

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In sacco NDF degradability and mineral release from selected forages in the rumen

Cited by 8 publications

References 11 publications

In situ and in vitro estimation of mineral release from common feedstuffs fed to cattle

In situ and in vitro estimation of mineral release from common feedstuffs fed to cattle

Changes in methane release from organic matter passing through the digestive tract of horses

In sacco macromineral release from selected forages

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