Palatability of shrubs and fodder trees measured on sheep and dromedaries: 1. Methodological approach

Salem, H. Ben; Nefzaoui, A.; Abdouli, H.

doi:10.1016/0377-8401(94)90072-8

Cited by 43 publications

(37 citation statements)

References 11 publications

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“…A. herba-alba communities are commonly used as spring pastures by sheep producers. Our results show that this plant has a medium CP content, similar to that reported by El Aich (1992) in Morocco, and slightly greater than values observed for the same plant species collected from Tunisian rangelands (Ben Salem et al, 1994). This plant also showed a low tannin content and medium digestibility.…”

Section: Discussionsupporting

confidence: 88%

Nutritive evaluation of foliage from fodder trees and shrubs characteristic of Algerian arid and semi-arid areas

Bouazza¹,

Bodas²,

Boufennara³

et al. 2012

J. Anim. Feed Sci.

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The chemical composition and digestibility of foliage from nine browse plant species (Artemisia herba-alba, Atriplex halimus, Acacia nilotica, Acacia horrida, Acacia saligna, Faidherbia albida, Albizia julibrissin, Vicia faba and Punica granatum) grown in arid and semi-arid areas of Algeria were evaluated. Feed components were determined by proximate analysis, whereas phenolic and tannin compounds were analysed by colorimetric procedures and their activity tested using a biological assay. Digestibility was assessed by conventional gravimetric in vitro and in situ methods, and rumen fermentation kinetics were estimated from the in vitro gas production technique. The foliage from Acacia species was found to be a protein-rich fodder for ruminants, although the high lignin and tannin content of some species is an important constraint limiting its digestive utilization in the gastrointestinal tract. The leguminous fodder tree, A. julibrissin, has a high protein content and its foliage is highly digestible owing to its low tannin content. Foliage from P. granatum is a highly digestible browse for ruminants.

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Section: Discussionsupporting

confidence: 88%

Nutritive evaluation of foliage from fodder trees and shrubs characteristic of Algerian arid and semi-arid areas

Bouazza¹,

Bodas²,

Boufennara³

et al. 2012

J. Anim. Feed Sci.

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“…In the short term experimental periods of eight days, intake levels of individual species did not vary significantly across the days. This is in agreement with Ben-Salem et al (2008), who carried out a proportion of intake assessment for nine days and concluded that one day of measurement may be sufficient for proportion of intake assessments. Tribe (1950) stated that -food selection of an animal today may be critically influenced by what it chose yesterday‖.…”

Section: Discussionsupporting

confidence: 91%

Seasonal Preference of Awassi Sheep for Atriplex shrubs suitable for Mediterranean Rangelands

Wamatu¹,

Louhaichi²,

Rubanza³

et al. 2017

JEBAS

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The relative preference of Awassi sheep for four promising Atriplex species, A. halimus, A. nummularia, A. canescens and A. lentiformis was tested in cafeteria trials. Atriplex species were offered to sixteen sheep in cafeteria-type experiments during two seasons, spring and autumn. After an adaptation period of 7 days, sheep were offered the species over eight consecutive days. The species were placed in troughs for two hours in the morning after overnight fasting. Sheep were housed individually in pens adjacent to each other. In both seasons, whole species and their botanical fractions were evaluated for chemical composition and in vitro digestibility. The variability of nutritive value among species was not dependent on season or botanical fraction. Time series analysis showed that intake levels and ranking of species did not change over the eight days. Average daily proportions (%) of whole shrub eaten were A. halimus (70.9) A. nummularia (70), A. lentiformis (65.3), and A. canescens (57.9). In autumn, the same order of consumption was maintained, though intake levels tended to be lower compared to spring. The behavioral pattern revealed that the number of return visits to troughs and time spent feeding on species did not influence intake levels. The botanical structure of species explained 20% of the variation in proportion of intake of whole species. The proportion of leaf was the major contributor to variation in proportion of intake of whole species. Relative preference of whole species was explained by intake, nutritive value and fractional proportions of the botanical fractions.

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“…During the second 10 days, the sheep received half of the experimental diets (55% ME m ) at 07:00 h and additionally low-quality hay (100% ME m ) at 16:00 h. Individual foragespecific feed intake was measured twice a day: once after a short evaluation period t (t = 7.5 min for ensiled forage and t = 15 min for dried forage) and once in the afternoon at 16:00 h. The daily palatability index [PI; equation (2)] was calculated according to the following formula 51 :…”

Section: Feed Palatabilitymentioning

confidence: 99%

Tanniferous forage plants: Agronomic performance, palatability and efficacy against parasitic nematodes in sheep

Häring

Scharenberg

Heckendorn

et al. 2008

Renew. Agric. Food Syst.

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Tanniferous forage plants can have beneficial effects on ruminant productivity and health (improved protein supply, bloat safety and antiparasitic properties). However, condensed tannins can also lower palatability, voluntary feed intake and digestibility. The aim of our interdisciplinary project was to generate basic knowledge on plant management, feed palatability and the antiparasitic properties of tanniferous forage plants for their practical application in agronomy, focusing on their usefulness in controlling gastrointestinal nematodes in organic farming. We found that Onobrychis viciifolia (sainfoin), Lotus corniculatus (birdsfoot trefoil) and Cichorium intybus (chicory) were suitable for cultivation under the given temperate climatic conditions, whereas Lotus pedunculatus (big trefoil) was soon outcompeted by unsown species. Growing the tanniferous plant species in a mixture with Festuca pratensis (meadow fescue) rather than in a monoculture had the advantage of increasing total dry matter (DM) yield (especially in the case of tanniferous legumes) and of reducing the DM proportions of unsown species. However, due to dilution by non-tanniferous F. pratensis, the tannin concentrations of mixtures were clearly lower and the seasonal fluctuations in tannin concentrations greater than that of monocultures. Across species, tannin concentrations were highest for O. viciifolia, followed by L. corniculatus and very low for C. intybus. Palatability of all tanniferous forages was comparable to that of a ryegrass/clover mixture when fed as dried forage and, when offered as silage, palatability of O. viciifolia was clearly superior to that of the respective ryegrass/clover control. Administration of dried or ensiled O. viciifolia reduced parasite egg counts in feces of lambs co-infected with the gastrointestinal nematode species Haemonchus contortus and Cooperia curticei. We conclude that O. viciifolia is the most promising among the tested tanniferous forage plant species due to its suitability for cultivation, its high tannin concentration, its high palatability and its antiparasitic activity even in dried or ensiled form.

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Palatability of shrubs and fodder trees measured on sheep and dromedaries: 1. Methodological approach

Cited by 43 publications

References 11 publications

Nutritive evaluation of foliage from fodder trees and shrubs characteristic of Algerian arid and semi-arid areas

Nutritive evaluation of foliage from fodder trees and shrubs characteristic of Algerian arid and semi-arid areas

Seasonal Preference of Awassi Sheep for Atriplex shrubs suitable for Mediterranean Rangelands

Tanniferous forage plants: Agronomic performance, palatability and efficacy against parasitic nematodes in sheep

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