Influence de la complémentation des foins traités à l'ammoniac sur leur valeur nutritive

Benahmed, H.; Dulphy, J.P.; Dudilieu, Madeleine; Jailler, Marie; Jamot, Jacqueline; Bousquet, H.; L'hotelier, L.

doi:10.1051/animres:19870205

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…Offner et al [13] also showed that ammonium nitrogen can come from the soluble proteins (26% of the crude protein). The decrease of the rumen N-NH 3 concentration associated with the consumption of PM_Ar and PM_Co_Ar rations, compared to the PM and PM_Co ones in our experience, is in agreement with the results of Ben Ahmed and Dulphy [14] and Dulphy et al [15]. The concentration of ammonia nitrogen released in the rumen with PM_Co was much greater than the value of 50 mg/L considered as the upper limit for a good functioning rumen [16].…”

Section: Ammonia Nitrogensupporting

confidence: 90%

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams

Laibi¹,

Senou²,

Sagbo³

et al. 2015

JEP

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Four groups each composed of six rams with 15 kg average body weight were submitted to one of the following diet: Panicum maximum C1 (PM), Panicum maximum C1 plus concentrate (PM_Co), Panicum m. C1 plus clay (PM_Ar ) and Panicum maximum C1 plus concentrate plus clay (PM_Co_Ar). The concentrate is composed of 90% weat bran, 9.25% cottonseed cake, 0.5% premix and 0.25 cooking salt. The clay used was a mixture of 59% smectite, 14% kaolinite and 27% quartz. The significance of treatments on variation in physico-chemical characteristics (ruminal pH and concentration of ammonia nitrogen), as well as in the rumen fermentation profile i.e. Volatile Fatty Acid concentration and in the enteric methane (CH4) production, depending on the rumen fluid collection time (at 9 o'clock and 13 o'clock), were studied using AOV. The highest ruminal pH was recorded in animals fed the mixture of Panicum plus clay, which is 7.02 ± 0.12 against 6.96 ± 0.12, 6.8 ± 0.06 and 6.69 ± 0.15, respectively in animals fed with PM, PM_Co and PM_Co_Ar. Incorporation of clay in the mixture of Panicum C1 plus concentrate had a stabilizing effect on ruminal pH. A significant decrease in the concentration of ruminal N-NH3 was recorded with PM_Ar (56.6 ± 15.2 g/ml), compared to PM (89.0 ± 18.9 g/ml). However, the ruminal N-NH3 concentration of animals fed the PM_Co diet (71.0 ± 15.1g /ml) increased in comparison to that of the PM_Co_Ar diet fed animals. Compared to the enteric methane concentration of the PM ration fed animals, the decrease of CH4 concentration was 2% -5%, 7% -11% and 19% -23% respectively in the PM_Ar, the PM_Co and the PM_Co_Ar diets fed rams. These results suggest that the methane reducing effect of clay might be emphasized by the concentrate supplementation of the diet.

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Section: Ammonia Nitrogensupporting

confidence: 90%

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams

Laibi¹,

Senou²,

Sagbo³

et al. 2015

JEP

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Effect of ammonia treatment of barley straw on the dynamics of its degradation in the rumen

et al. 1993

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Two experiments were designed to examine the effects of ammonia treatment of barley straw on rumen environmental conditions for fibre degradation, and to determine the effect of treatment on the soluble and insoluble fractions of straw. In experiment 1, rumen pH, and ammonia-nitrogen and volatile fatty acid concentrations in the rumen of sheep receiving untreated (US1) or ammonia-treated (TS1) straw were recorded. Also, both straws were incubated in the rumen of both groups of animals. There were no significant differences (P> 0·05) within rumen parameters, except for butyrate proportion, which was higher (P< 0·01) with TS1. Dry matter and neutraldetergent fibre disappearances of TS1 were higher (P< 0·001) than those of US1 at all the incubation times. Degradation of both straws in US1-fed sheep was not smaller, and in some periods of incubation was even greater, than in TS1-fed animals. In experiment 2, samples of untreated (US2) and treated (TS2) straw were incubated in wethers offered a mixture (50:50) of alfalfa hay and straw. Samples of US2 and TS2 were soaked in autoclaved rumen fluid to measure their solubility. It was clear that, although treatment increased the soluble fraction of US2 and TS2 by 52 and 65 g/kg respectively, from 0 to 72 h of incubation, increasing the differences between straws from 45 to 58 g/kg in that period, actual microbial action on the treated roughage was the more important factor, accounting for a difference between US2 and TS2 of 131 g/kg after 72 h incubation.

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The effect of protein degradation products in grass silages on feed intake and intake behaviour in sheep

Os¹,

Dulphy²,

Baumont³

1995

Br J Nutr

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The effects of NH, and amines on grass-silage intake, intake behaviour and rumen characteristics were studied in sheep. From a single sward, two direct-cut grass silages were prepared, either untreated (WAS) or with 4 5 1 formic acidltonne (FAS). Four experimental diets: WAS, FAS, FAS with addition of 2.9 g NH,bg DM (FAS+N) and FAS with 2-8 g aminesbg DM @AS+ A), were offered ad lib. once daily to four rumen-cannulated wethers in a 4 x 4 Latin square design. Daily DM intake (DMI) tended to be influenced by dietary treatment (P = 0.09). Compared with FAS, DMI was lower for WAS. Addition of NH, did not alter DMI, whereas amine addition slightly lowered daily DMI.Reduced DMI resulted from lower intake rates during both the principal meal and the subsequent small meals. Lower initial intake rate during the principal meal suggested reduced palatability of WAS and FAS+A. Amines and NH3, however, did not influence chewing efficiency. No treatment effects were observed on total rumen pool size, DM and neutral-detergent fibre content. Furthermore, NH, and amines did not alter rumen pH, NH, and volatile fatty acid concentrations to the extent that they could act on chemostatic intake regulation. Amine addition, however, lowered osmolality of the rumen liquid. No treatment effects on rumen motility were observed. In conclusion, daily DMI was not reduced by the addition of NH,, suggesting that NH,per se is not the causal factor in the negative correlations between silage NH, content and intake observed by other authors. Amines, however, tended to reduce DMI only by their effect at the oro-pharyngeal level of intake control.Silage: Feed intake: Ammonia: Amines: SheepThe generally lower voluntary intake of grass silages compared with hay prepared from the same fresh forage or with the fresh forage itself is mainly attributed to fermentation endproducts present in the silage. This reduction in intake varies widely (ranging from 0 to 64 %) and is related to the quantities of the fermentation products in the silage, which vary with the method of preservation (Demarquilly, 1973 ; Donaldson & Edwards, 1976; Thiago et al. 1992~). These fermentation products (organic acids, NH,, amines) may regulate intake by their oro-pharyngeal properties (taste, smell) or metabolically (metabolites in rumen and/or blood; Gill et al. 1987). Rumen fill appears to be of minor importance in controlling silage intake, because rumen DM content remains lower when the animals are fed on silages compared with hays prepared from the same original herbage (Thiago & Gill, 1986;Chiofalo et al. 1992). Relationships between silage constituents and intake suggest that NH, is one of the factors responsible for reduction in intake of poor-quality silages

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Influence de la complémentation des foins traités à l'ammoniac sur leur valeur nutritive

Cited by 4 publications

References 2 publications

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams

Effect of ammonia treatment of barley straw on the dynamics of its degradation in the rumen

The effect of protein degradation products in grass silages on feed intake and intake behaviour in sheep

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Influence de la complémentation des foins traités à l'ammoniac sur leur valeur nutritive

Cited by 4 publications

References 2 publications

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonk&#233; Rams

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonk&#233; Rams

Effect of ammonia treatment of barley straw on the dynamics of its degradation in the rumen

The effect of protein degradation products in grass silages on feed intake and intake behaviour in sheep

Contact Info

Product

Resources

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The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams

The Use of Clay as a Methane Emission Mitigating Feed Additive in Djallonké Rams