Intake and digestion in sheep given fresh or air-dried Acacia cyanophylla Lindl foliage

Salem, H. Ben; Nefzaoui, A.; Salem, L. Ben; Ferchichi, Henda; Tisserand, JL

doi:10.1051/animres:19970407

Cited by 19 publications

(8 citation statements)

References 7 publications

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“…Results are in agreement with those reported by [52] who indicated that goats would be able to utilize nitrogen more efficiently than sheep. The decline in nitrogen retention of animals fed tree legumes mixture vs. alfalfa hay might be due to the lack of soluble nitrogen or low digestibility in the basal diets and high tannins concentrations in browse species have been associated with reduced nitrogen retention [53,54]. Conversely, diets high in condensed tannins can also increase post-ruminal absorption of nitrogen [55], decrease in fecal nitrogen excretion [56] and increase N retention [57].…”

Section: Nitrogen Utilizationmentioning

confidence: 99%

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

2018

Am.-Eursion j. sustain. Agric.

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This research was performed to compare the nutritional studies of Barki sheep and doe Shami goats fed on mixture of forage tree legumes and its effects on feed intake, nutrient digestibility, nutritive value, nitrogen utilization, body weight change, some parameters of rumen and blood. Our study was carried out at South Sinai Research Station (Ras Suder), South Sinai Governorate, Egypt. Thirty-six pregnant Barki sheep and Shami goats were randomly allocated into two equal groups (18 animals each specie). The first group (G1) of each species fed alfalfa with concentrate diet and served as control. The second group (G2) fed ad libtum sun-dried chopped mixture contained 50% Acacia saligna, 25% Prosopis juliflora and 25% Leucaena leucocephala with concentrate diet. Results indicated that overall roughage and total DM intake (g/Kg W 0.75 /d) were similar between both species but animals fed G2 showed lower (P<0.05) in roughage and total DM intake than those fed G1. The results also showed that goats had higher (P<0.05) overall dry matter (DM), crud protein (CP) and crud fiber (CF) digestibility than sheep but overall nitrogen intake (NI) was similar between both species and was higher (P<0.05) for animals fed G1 vs. those fed G2. Also, nitrogen balance was similar between both species and was insignificant higher for those fed G1 vs. G2. Goats had higher (P<0.05) overall ammonia NH3-N than sheep but sheep had higher (P<0.05) overall ruminal TVFA´s than goats as well as animals fed G2 showed lower (P<0.05) NH3-N and TVFA´s than those fed G1. Values of body weight change (kg) and relative body weight (%) of end pregnancy were insignificant between both species and feeding treatments. Sheep had slightly insignificant lower concentrations of overall total protein and globulin than goats and was also slightly insignificant higher concentrations of overall urea and creatinine than goats while goats recorded insignificant higher values of overall AST and ALT than sheep. It was concluded feed utilization of tree legumes mixture as animal feeds in saline affected and soils could be an appropriate option for alleviating the desertification difficulties and provide alternatives as good feed resources especially in droughts when the other traditional food resources are shortage.

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Section: Nitrogen Utilizationmentioning

confidence: 99%

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

2018

Am.-Eursion j. sustain. Agric.

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“…Tannin effects on ruminant nutrition have been studied for several years, and are often seen only in terms of their negative impacts on intake and production: decreased nutrient utilization, particularly protein [ 48 ]; decreased palatability and consequently the amount of food ingested; decreased digestibility [ 6 , 7 , 49 ]; volatile fatty acids production reduction, and decreased digestibility of organic matter and fiber [ 50 ]; damage of kidney and liver [ 8 ]; tissue damage in the rumen, intestine ulceration and morphological changes at the microvilli level [ 51 ]. However, besides these anti-nutritional and toxic effects, there is an increasingly awareness of tannin’s beneficial roles on animal nutrition and health [ 52 ], namely influences on the cell signaling pathways [ 53 ], anti-oxidative effects [ 54 ], and anti-helmintic [ 55 , 56 ] and anti-microbial [ 57 ] activities.…”

Section: Tannins and Its Relation To The Choice Of Foodmentioning

confidence: 99%

The Effect of Tannins on Mediterranean Ruminant Ingestive Behavior: The Role of the Oral Cavity

et al. 2011

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Sheep, cattle and goat are domestic ruminants of significant economic interest in the Mediterranean region. Although sharing the same pasture ranges, they ingest different plants and plant parts and, consequently different levels of tannins. This suggests an ability to detect and adapt ingestion according to animal physiological limits of tolerance for plant secondary metabolites. This review will detail the effects of dietary tannins on feeding behavior, and the role of the oral cavity in this process, with focus on such ruminant species. The role of salivary protein profile in tannin perception in the oral cavity, and as a defense mechanism, will be discussed.

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“…The few earlier national studies in this topic were dealing with the improvement of the nutritive value of acaciabased diets by energy and nitrogen supplies (Ben Salem et al, 1995), polyethylene glycol (PEG) treatment (Ben Salem et al, 1996) and by air drying foliage (Ben Salem et al, 1997a). The most encouraging results were obtained with PEG treatment which deactivate condensed tannin in acacia leaves and improved significantly diet nutritive value and sheep growth.…”

Section: Introductionmentioning

confidence: 99%

Effects of multinutrient blocks and polyethylene glycol 4000 supplies on intake and digestion by sheep fed Acacia cyanophylla Lindl. foliage-based diets

Moujahed¹,

Kayouli

Thewis

et al. 2000

Animal Feed Science and Technology

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The effect of multinutrient block supply and polyethylene glycol 4000 (PEG) on intake, digestion and rumen fermentation was studied in sheep fed with air-dried Acacia cyanophylla foliage (acacia)-based diet. In Experiment I, six Noire de Thibar breed sheep (BW = 46 kg) were used in double 3 x 3 Latin square design. All diets included about 360 g of dry matter (DM) of oat-vetch hay and acacia ad libitum. Diet D0 was without a block supplement. Diet D1 included a urea-molasses-mineral block (B1). While D2 included another type of block (B2) that differed from B1 essentially by adding polyethylene glycol 4000. Each experimental period lasted 33 days (21 days for adaptation and two periods of 5 days for measurement separated by 2 days for rest). Feed intake, apparent digestibility of organic matter (OM), crude protein (CP) and crude fibre (CF) and retained nitrogen (Nr) were measured by total faecal collection. In Experiment II, four Noire de Thibar sheep (BW = 53 kg) fitted with rumen cannulae were fed sequentially D0, Dl and D2, respectively, to 90% of intake levels as measured in Experiment I on metabolic weight (MW) base. Fermentation parameters in rumen liquid (pH, NH 3 -N, volatile fatty acid (VFA)) were measured at 0, 2, 5, 8, 10, 13, 16 and 21 h after the morning meal. Protozoal number and composition in rumen fluid were determined at 2 h sampling time. Solid digesta kinetics through the rumen was measured using chromium (Cr) mordanced acacia. The DM and CP degradation of acacia was determined using the nylon bag technique.Acacia had a relatively high content of condensed tannins (41 g kg -1 of DM) and acid detergent lignin (176 g kg -1of DM). B1 and B2 were high in CP (381 and 369 g kg -1 of DM, respectively) compared to acacia (127 g kg -1 of DM, 20% bound to fibre) and hay (75 g kg -1 of DM). The two kinds of blocks improved similarly (P < 0.001) acacia DM intake by 195 g. Block 1 increased (P < 0.001) only diet CP digestibility and Nr. Block 2 increased (P < 0.05) by a low extent DM and OM digestibility compared to D1, and remarkably (P < 0.001) CP digestibility and Nr compared to D0 and Dl. Block supplies considerably increased water intake. Both B1 and B2 increased (P < 0.001) NH 3 -N and VFA concentrations in the rumen liquid with a positive specific effect of B2 (PEG). VFA molar proportion was significantly modified by B1 and B2. B1 and B2 decreased acetate proportion and increased propionate and butyrate proportions as compared to D0 (P < 0.001). Protozoal number in rumen fluid was increased significantly by B1 and B2 (P < 0.001). PEG-containing block (B2) increased protozoal number as compared to B1. Both B1 and B2 increased (P < 0.001) solid outflow rate, with a specific increasing effect of B2 (D2) when compared to B1 (D1). Blocks supply did not modify in situ DM degradability of acacia, but B2 improved (P < 0.05) effective degradability of CP when compared to D0 and Dl which were similar. It is concluded that both B1 and B2 improved the nutritive value of acacia-based diet. A further pos...

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Intake and digestion in sheep given fresh or air-dried Acacia cyanophylla Lindl foliage

Cited by 19 publications

References 7 publications

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

Comparative nutritional studies of sheep and goats fed cultivated tree legumes mixture under desert condition

The Effect of Tannins on Mediterranean Ruminant Ingestive Behavior: The Role of the Oral Cavity

Effects of multinutrient blocks and polyethylene glycol 4000 supplies on intake and digestion by sheep fed Acacia cyanophylla Lindl. foliage-based diets

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