Effects of chopping grass silage and mixing silage with concentrate on feed intake, dietary selection, chewing activity and faecal particle size of ewes in late pregnancy and early lactation

Helander, Carl; Nørgaard, P.; Jalali, Ali Reza; Nadeau, Elisabet

doi:10.1016/j.livsci.2014.02.013

Cited by 7 publications

(8 citation statements)

References 26 publications

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“…A possible cause to this discrepancy is that the relatively high dietary crude fat concentrations in Y1 might have had a more negative effect on the more mature fibre in the late-harvested maize than on the immature fibre in the early-harvested maize, with this negative effect not occurring in Y2 when the fat concentrations in the diets were lower. The NDFI in relation to BW in our study was similar to that found in some earlier studies with sheep fed large proportions of forage (Fraser et al, 2000, Jalali et al, 2012 but lower than in other studies (Helander et al, 2014a(Helander et al, , 2014b. The NDFI in relation to BW obtained in the present study was considered sufficient for enabling a functional rumen, and well above the lower limit of the equivalence of 2% straw in concentrate-based diets, as suggested by Weston (1974).…”

Section: Effects Of Maize Maturity Stage At Harvestsupporting

confidence: 89%

Effects of maize crop maturity at harvest and dietary inclusion rate of maize silage on feed intake and performance in lambs fed high-concentrate diets

et al. 2015

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Section: Effects Of Maize Maturity Stage At Harvestsupporting

confidence: 89%

Effects of maize crop maturity at harvest and dietary inclusion rate of maize silage on feed intake and performance in lambs fed high-concentrate diets

et al. 2015

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“…The lactating ewes fed the LFV silage clearly sought to increase their MEI by sorting for the most digestible parts of the silage, as shown in this experiment with higher concentrations of ME and CP in the silage offered than in the refused silage. Sorting for the most nutritious and digestible parts of the forage by sheep has previously been shown (Bernes et al ., ; Helander et al ., ) and the sorting is more extensive in unchopped forage compared to chopped forage, as was also shown recently by Helander et al . ().…”

Section: Discussionsupporting

confidence: 78%

“…Sorting for the most nutritious and digestible parts of the forage by sheep has previously been shown (Bernes et al ., ; Helander et al ., ) and the sorting is more extensive in unchopped forage compared to chopped forage, as was also shown recently by Helander et al . (). It needs to be considered that some of the silage fed to the ewes during lactation was consumed by the lambs and this was considered equal over treatments.…”

Section: Discussionsupporting

confidence: 78%

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Effects of grass silage feed value on feed intake and performance of pregnant and lactating ewes and their lambs

Nadeau

Arnesson

Helander

2015

Grass and Forage Science

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Effects of grass silage feed value on intake, dietary sorting, body condition (BC) and body weight (BW) of pregnant and lactating ewes and on liveweight gain (LWG) of their suckling lambs were evaluated. Twin‐bearing ewes were fed ad libitum grass silage of (i) high feed value (HFV), (ii) medium feed value (MFV) and (iii) low feed value (LFV), plus 0·8 kg concentrate in late pregnancy and lactation. The HFV, MFV and LFV silages contained 11·7, 10·8 and 9·3 MJ metabolizable energy (ME) kg−1 DM respectively. The HFV resulted in 8·2 and 15·2 MJ greater ME intake in pregnancy and 14·7 and 21·0 MJ greater ME intake from silage in lactation than MFV and LFV respectively (P < 0·01). Ewes fed the MFV and LFV silages sorted for more digestible particles during eating (P < 0·10). The HFV gave no loss in BC, whereas ewes fed MFV and LFV lost 0·7 and 0·8 units of BC, respectively, during lactation (P < 0·10). There were similar trends in BW. The nursing HFV lambs had 73 g higher daily LWG than the LFV lambs (P < 0·01). In conclusion, the HFV increased the ME intake of pregnant and lactating ewes, resulting in improved BC and BW of lactating ewes and LWG of suckling lambs compared to MFV and LFV.

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“…The size distribution of forage particles that pass through the reticulo-omasal sphincter has not been studied in free-ranging white-tailed deer. In domestic sheep, fecal particle size is not constant but varies with reproductive state and diet (Helander et al 2014). A small particle size for an animal consuming a predominantly opuntia diet, for example, might not be the same as small particle sizes for animals consuming a predominantly leafy browse and acorn diet.…”

Section: Discussionmentioning

confidence: 99%

Use of rumen–reticulum fill to examine nutrient transfer and factors influencing food intake in white-tailed deer (Odocoileusvirginianus)

et al. 2015

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Estimating relationships of gut fill in mammalian herbivores is useful to understanding digestive functions. Large animals might have more fluid in the gut to facilitate nutrient transfer between the gut lumen and the gut wall. Furthermore, relationships between concentrations of dietary refractory and indigestible fiber (CRIF) and gut fill might indicate whether chemostatic factors or physical distension of the gut affects food intake. We collected white-tailed deer (Odocoileus virginianus (Zimmermann, 1780); 122 males, 152 females) from three sites in central and south Texas that varied in diet quality as indexed by rumen-reticulum crude protein concentrations. Large animals did not have more fluid in their rumina-reticula than small animals because the scalar between body mass and wet mass of rumen-reticulum contents was not greater than the scalar estimated for dry mass of rumen-reticulum contents. We expected a positive or an inverse relationship when rates of forage comminution, digestion, and particle passage were high or low, respectively. At the site where deer had access to a high-quality pelleted diet, we detected a positive relationship between CRIF and dry mass. At sites with free-ranging deer and lower quality diets, relationships between CRIF and dry fill were inversely related. Food intake of deer was probably influenced by chemostatic factors at the site with a high-quality pelleted diet and by physical distension of the gut at the other two sites.Résumé : L'estimation des relations du contenu intestinal chez les herbivores mammaliens est utile pour comprendre les fonctions digestives. Les grands animaux pourraient avoir plus de liquide dans leur intestin pour faciliter le transfert de nutriments entre la lumière et la paroi de ce dernier. En outre, les relations entre la concentration de fibres alimentaires réfractaires et non digestibles (CRIF) et le contenu intestinal pourraient indiquer si des facteurs chimiostatiques ou la distension physique de l'intestin ont une incidence sur l'ingestion d'aliments. Nous avons prélevé des cerfs de Virginie (Odocoileus virginianus (Zimmermann, 1780); 122 mâles, 152 femelles) de trois sites du centre et du sud du Texas présentant de la nourriture de différents niveaux de qualité de la nourriture indiqués par les concentrations de protéines brutes dans le rumen-réticulum. Les grands individus n'avaient pas plus de liquide dans leur rumen-réticulum que les petits individus parce que le scalaire entre la masse corporelle et la masse humide du contenu du rumen-réticulum n'était pas plus grand que le scalaire estimé pour la masse sèche du contenu du rumen-réticulum. Nous nous attendions à une relation positive ou négative quand les taux de communition et de digestion du fourrage et de passage des particules étaient élevés ou faibles, respectivement. Au site où les cerfs avaient accès à des aliments en boulettes de haute qualité, nous avons noté une relation positive entre les CRIF et la masse sèche. Aux sites où les cerfs étaient en liberté et caractérisés par de...

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Effects of chopping grass silage and mixing silage with concentrate on feed intake, dietary selection, chewing activity and faecal particle size of ewes in late pregnancy and early lactation

Cited by 7 publications

References 26 publications

Effects of maize crop maturity at harvest and dietary inclusion rate of maize silage on feed intake and performance in lambs fed high-concentrate diets

Effects of maize crop maturity at harvest and dietary inclusion rate of maize silage on feed intake and performance in lambs fed high-concentrate diets

Effects of grass silage feed value on feed intake and performance of pregnant and lactating ewes and their lambs

Use of rumen–reticulum fill to examine nutrient transfer and factors influencing food intake in white-tailed deer (Odocoileusvirginianus)

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