In sacco dry matter degradability and Ca, Mg and P disappearance from italian ryegrass, alfalfa hay and wheat straw in sheep and goats

Flachowsky, Gerhard; Grün, M.; Polzin, S.; Kronemann, H.

doi:10.1111/j.1439-0396.1994.tb00340.x

Cited by 8 publications

(9 citation statements)

References 27 publications

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“…During studies on forage nitrogen degradation, contamination was measured [18,39] and can represent up to 61% of the total nitrogen remaining in the bags after 12 h of incubation [18]. In mineral studies, bacterial contamination has been deduced but not quantified from rumen phosphorus release measurements on Italian rye-grass, wheat straw and alfalfa hay [5,6]. However, as for nitrogen [18], the extent of phosphorus contamination becomes quantitatively important for feedstuffs low in phosphorus such as forages [10] and with high microbial phosphorus content such as cellulolytic bacteria [12].…”

Section: Phosphorus Supply To Rumen Microbesmentioning

confidence: 99%

“…Previous authors have studied either phosphorus availability or phosphorus use by rumen microbes using radio labelled phosphorus [36], in vitro devices and in vivo trials [3,37]. The aim of the present work was to measure the rumen phosphorus release from feedstuffs commonly used in ruminant diets by the nylon bag technique [17,19] as previously done on forages [5,6,26].…”

Section: Introductionmentioning

confidence: 99%

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Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

Bravo

Meschy

Bogaert³

et al. 2000

Reprod. Nutr. Dev.

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-The present study was aimed at determining rumen phosphorus availability of some feedstuffs assessed with the nylon bag technique: forage (alfalfa), cereals (control-C wheat, formaldehyde treated-FT wheat, barley, corn), cereal by-products (wheat bran, wheat distillers, corn distillers) and meals (C and FT soya bean meals, rapeseed meals and sunflower meals). Rumen phosphorus availability was not uniform amongst the feedstuffs, varying from 33.1% (FT rapeseed meal) to 84.7% (C wheat). Alfalfa phosphorus release kinetics showed high bacterial phosphorus contamination. Technological treatments affected phosphorus content of by-products by either increasing (wheat bran and distillers) or decreasing (corn distillers) after germ extraction from the seed. Formaldehyde treatment decreasing rumen phosphorus availability (from 77.2% vs. 89.4% for wheat to 33.1% vs. 64.4% for the rapeseed meal) may depreciate the phosphorus nutritional value of FT meals. availability / feedstuff / phosphorus / rumenRésumé -Disponibilité ruminale du phosphore de certaines matières premières mesurée à l'aide de la méthode des sachets nylon. Cet article décrit la détermination, par la méthode des sachets nylon, de la disponibilité ruminale du phosphore d'un fourrage (luzerne déshydratée), de céréales (blé, blé tanné, orge, maïs), de sous-produits de céréales (son et drêches de blé, drêches de maïs) et de tourteaux (soja et soja tanné, colza et colza tanné, tournesol et tournesol tanné). La disponibilité ruminale du phosphore est très variable : de 33,1 % (tourteau de colza tanné) à 84,7 % (blé). La cinétique de libération du phosphore de la luzerne indique une importante contamination par le phosphore bactérien. Les traitements technologiques influencent la teneur en phosphore. L'extraction du germe enrichit (son et drêches de blé) ou appauvrit (drêche de maïs) en phosphore les sous-produits par rapport à la céréale. Le tannage au formol, diminuant la disponibilité ruminale du phosphore (de 77,2 % vs. 89,4 %, blé à 33,1 % vs. 64,4 %, tourteau de colza), semble pénaliser la valeur nutritionnelle du phosphore des tourteaux tannés. disponibilité / matière première / phosphore / rumen

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Section: Phosphorus Supply To Rumen Microbesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

Bravo

Meschy

Bogaert³

et al. 2000

Reprod. Nutr. Dev.

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“…The course of the curves (Figure 5) of K release from the other forages is very different, but all are expressed by cubic polynomials (Table 6) with significant regression coefficients R 2 = 0.947 for LH1. The potassium concentration did not reach the concentration in the original feeds (Flachowsky et al, 1994;Eys and Reid, 1987;Emanuele et al, 1991).…”

Section: Resultsmentioning

confidence: 97%

“…This indicates that these elements are located in different parts of the plant and have different functions. Potassium is located in the cell contents or part of water-soluble plant components and a large portion of slowly released Ca is bound to the cell walls of plants and to bacterial cell walls (Emanuele and Staples, 1990;Flachowsky et al, 1994). Table 3.…”

Section: Resultsmentioning

confidence: 99%

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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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Phytate in feed ingredients and potentials for improving the utilization of phosphorus in ruminant nutrition

Humer

Zebeli

2015

Animal Feed Science and Technology

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In sacco dry matter degradability and Ca, Mg and P disappearance from italian ryegrass, alfalfa hay and wheat straw in sheep and goats

Cited by 8 publications

References 27 publications

Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique

In sacco macromineral release from selected forages

Phytate in feed ingredients and potentials for improving the utilization of phosphorus in ruminant nutrition

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