References of "Herremans, Sophie"
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See detailOak or chestnut tannin dose responses on silage pH, proteolysis and in vitro digestibility in laboratory-scale silos
Herremans, Sophie ULiege; Decruyenaere, Virginie; Beckers, Yves ULiege et al

in Biotechnologie, Agronomie, Société et Environnement (2019), 23(2), 59-62

Description of the subject. This short note documents the use of hydrolyzable tannins as silage additives to reduce proteolysis thanks to a laboratory-scale ensiling method. Objectives. To study oak (OTE ... [more ▼]

Description of the subject. This short note documents the use of hydrolyzable tannins as silage additives to reduce proteolysis thanks to a laboratory-scale ensiling method. Objectives. To study oak (OTE) and chestnut tannin extract (CTE) dose responses on chemical composition, pH and ammoniacal nitrogen (N-NH3) content of silage. Method. A mixture of cocksfoot, white and red clovers was ensiled in vacuum packs, with OTE or CTE at doses of 0, 10, 30, 50 and 70 g.kg-1 DM. Results. Hydrolyzable tannin extracts decreased N-NH3 content of silage up to 18% (p < 0.05). For the investigated range of doses, OTE induced a linear decrease of N-NH3 content (R² = 0.76) whereas CTE resulted in a quadratic decrease (R² = 0.68). High doses of tannin extracts reduced in vitro organic matter digestibility (OMD) by 3% (p < 0.05). Conclusions. Both tannins reduced proteolysis in silos but highest doses induced a decrease in OMD. [less ▲]

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See detailSilage additives to reduce protein degradation during ensiling and evaluation of in vitro ruminal nitrogen degradability
Herremans, Sophie ULiege; Decruyenaere, Virginie; Beckers, Yves ULiege et al

in Grass and Forage Science (2018)

Despite the high degradability of their proteins, grass and legume silages represent an important option to reach more sustainable livestock systems. To improve the nitrogen use efficiency of these crops ... [more ▼]

Despite the high degradability of their proteins, grass and legume silages represent an important option to reach more sustainable livestock systems. To improve the nitrogen use efficiency of these crops, this study assessed the potential of several additives (chestnut tannins, oak tannins, zeolite, erythritol by-product solution and wood molasses) to reduce proteolysis in the silo and in vitro nitrogen degradability. Ryegrass (Lolium multiflorum) and red clover (Trifolium pratense) were ensiled in varying proportions in laboratory-scale silos made of vacuum-packed plastic bags. Dry-matter content, chemical composition, pH, ammonia and volatile fatty acids content were analysed after 34 days of ensiling. Ruminal nitrogen degradability was assessed in vitro (Aufrère & Cartailler, 1988). We observed that the proportion of ammonia in silage was reduced by the addition of oak tannin (−12%) and zeolite (−16%). The addition of zeolite lowered in vitro organic matter digestibility. Rapidly degradable nitrogen (1-hr degradability) was reduced in vitro by both tannins (−6.8% for chestnut and −6.6% for oak) and zeolite (−5.8%), but total degradable nitrogen (24-hr degradability) was only reduced by oak (−6.5%) and chestnut tannins (−7.3%). It suggests that tannins protected proteins from plant and bacterial enzymes by forming a complex that better resists silage fermentations and in vitro protease action. The reduction effects on proteolysis in the silo and on in vitro ruminal nitrogen degradability are limited individually but could be cumulative. Erythritol by-product solution and wood molasses had no effect on silo or in vitro proteolysis. [less ▲]

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See detailInfluence of chestnut tannins on in vitro crude protein rumen degradability kinetics of red clover silage
Herremans, Sophie ULiege; Decruyenaere, Virginie; Beckers, Yves ULiege et al

Poster (2018, September)

Chestnut tannins in red clover silage reduce rumen dry matter and crude protein degradation. Adding tannins to silage could lead to better nitrogen use efficiency in ruminants.

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See detailLes cultures dérobées : des fourrages de qualité nutritive intéressante
Herremans, Sophie ULiege; Férard, Alexis; Wyss, Ueli et al

in Fourrages (2018), 233

Spring relay crops can provide complementary forage, especially during periods when traditional forage is lacking. However, little is known about their nutritional value. The Arvalis Plant Institute and ... [more ▼]

Spring relay crops can provide complementary forage, especially during periods when traditional forage is lacking. However, little is known about their nutritional value. The Arvalis Plant Institute and INRA each carried out a study on the nutritional qualities of several intercrop species. They found that fresh forage harvested at the vegetative stage was highly nutritional (containing as much as 1.13 French feed units for lactation, 158 g of metabolisable protein [PDIE], and 225 g of rumen degradable protein [PDIN] per kg DM). Silage can be made despite the forage’s low dry matter content and high buffering capacity (Agroscope study). In Wallonia, the quality of intercrop silage is good (0.76 French feed units for lactation, 102 g of metabolisable protein [PDIE], 81 g of rumen degradable protein [PDIN] per kg DM). Many of the study species contained secondary compounds, which can improve livestock health and livestock product quality. They can also reduce negative environmental impacts. [less ▲]

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See detailLes cultures dérobées : des fourrages de qualité nutritive intéressante
Herremans, Sophie ULiege; Ferard, Alexis; Wyss, Ueli et al

in Actes des Journées de printemps de l'AFPF : Sécuriser son système d'élevage avec des fourrages complémentaires : méteils, dérobées, crucifères... (2018, March)

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See detailInnovative silage additives to reduce proteolysis in the silo
Herremans, Sophie ULiege; Decruyenaere, Virginie; Beckers, Yves ULiege et al

Poster (2017, May 10)

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See detailComparison of two laboratory-scale ensiling methods to assess effect of reducing sugars
Herremans, Sophie ULiege; Decruyenaere, Virginie; Beckers, Yves ULiege et al

Poster (2017, February 07)

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See detailValeur alimentaire et conservation des ensilages de CIPANs fourragères
Herremans, Sophie ULiege

Conference given outside the academic context (2017)

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See detailComment mieux valoriser les fourrages riches en azote ?
Herremans, Sophie ULiege

Article for general public (2016)

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See detailQue vaut un ensilage de CIPAN fourragère?
Herremans, Sophie ULiege; Mathieux, Sophie; Decruyenaere, Virginie ULiege et al

Scientific conference (2016, November 04)

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