Utilization of low quality resources by small ruminants in Mediterranean agro-pastoral systems: the case of browse and aftermath cereal stubble

Landau, S.; Perevolotsky, Avi; Bonfil, David J.; Barkai, D.; Silanikove, Nissim

doi:10.1016/s0301-6226(00)00174-3

Cited by 79 publications

(45 citation statements)

References 37 publications

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“…Comparative research on sheep and goat digestive capacity is scarce, especially on the use of tannin-containing foods (Nú ñ ez- Hernandez et al, 1991). Landau et al (2000) reported that goats utilise CT-rich foods better than do sheep. In a previous work (Yá ñ ez Ruiz et al, 2004) we also pointed out that microbial protein synthesis was only significantly increased by polyethylene glycol (PEG) treatment, a tannins-binding compound, in sheep fed diets containing TSOC, in comparison with goats.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the effect of two-stage olive cake added to alfalfa on digestion and nitrogen losses in sheep and goats

Yáñez-Ruíz

Molina-Alcaide

2007

Animal

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This work was conducted to evaluate the effect of tannins, contained in a by-product derived from olive oil extraction (two-stage olive cake), on nutrient digestibility, nitrogen (N) losses and liver and kidney functions in goats and wethers. Six Segureñ a wethers and six Granadina goats were fed three experimental diets: alfalfa hay (AH); alfalfa hay and a concentrate (formulated with twostage olive cake, barley and a mineral-vitamin mixture) without (AHCO) or with polyethylene glycol (PEG) addition (AHCOP). The inclusion of two-stage olive cake increased condensed tannins content of the diet and led to a decrease ( P , 0.001) in dry matter, organic matter, neutral-detergent fibre, acid-detergent fibre and crude protein (CP) digestibility. PEG supply increased ( P , 0.001) CP digestibility and N losses in urine and faeces only in wethers. Concentrations of creatinine and alkaline phosphatase activity, measured in the serum of animals, were not modified either by olive cake inclusion or by PEG supply. Results from this work indicate a higher sensitivity of sheep to diets containing condensed tannins, compared with goats, and reveal no toxic effect of tannins from two-stage olive cake at the concentration used in the experimental diets.

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Section: Introductionmentioning

confidence: 99%

A comparative study of the effect of two-stage olive cake added to alfalfa on digestion and nitrogen losses in sheep and goats

Yáñez-Ruíz

Molina-Alcaide

2007

Animal

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“…Tannins are a group of substances (comprising hydrolysable and condensed forms) that bind to proteins in the rumen and can have either positive or negative effects on intake and digestion depending on the animal species and experience, the proportion in the diet and the absorption of feed additives (for a comprehensive review, see Makkar, 2003). For Mediterranean browse species, 0% to 24% condensed tannins in dry matter (DM) are reported (Cabiddu et al, 2000;Landau et al, 2000a;Frutos et al, 2002), with usually higher values measured in summer on mature vegetation compared to spring or winter. Species with medium to high condensed tannin content reported by these authors, such as Quercus ilex (3% to 8% DM), Erica arborea (27% to 30% DM), Myrtus comunis (12% to 15% DM) and Pistacia lentiscus (10% to 24% DM), are typical of maquis communities.…”

Section: Issues Related To Rangeland Utilization In the Mediterraneanmentioning

confidence: 99%

Rangeland utilization in Mediterranean farming systems

Jouven

Lapeyronie

Moulin

et al. 2010

Animal

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In the countries surrounding the Mediterranean basin, most of the semi-natural grazing lands are covered by rangelands. Rangelands can be defined as highly heterogeneous natural vegetation communities with high conservation value, growing in harsh environments (poor soils, unfavourable climatic conditions). In the recent socio-economic context, traditional livestock grazing practices that enabled one to reconcile rangeland preservation and animal production no longer apply, especially because they require labour that has become scarce and costly. The consequence is rangeland degradation, due to underutilization in Southern Europe, and overutilization in Northern Africa. We analysed issues raised by rangeland utilization in livestock farming systems of the Mediterranean basin. Based on a review of the scientific literature about rangeland utilization in this area, we argue that the best way to reconcile animal production and rangeland preservation would be to promote management practices allowing animals to express their adaptative capacities in feeding behaviour and productive response. In order to propose management practices adapted to extensive and simplified systems, we conclude that research efforts should focus on: (i) proposing a functional characterization of vegetation heterogeneity at the scale of the vegetation community, (ii) validating the criteria determining animals' foraging behaviour on Mediterranean rangelands, (iii) developing and using simulation models to test management strategies against seasonal and long-term variability in climatic conditions and (iv) evaluating the potential of modern technologies for improving rangeland utilization.

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“…One of their main functions is to act as a biochemical defense against herbivores [1]. Shrub and tree species in the Mediterranean Basin can differ significantly in their tannin leaf content [2][3][4][5][6]. Some species show clear seasonal differences [5] explained by their phenology [3].…”

Section: Introductionmentioning

confidence: 99%

“…Shrub and tree species in the Mediterranean Basin can differ significantly in their tannin leaf content [2][3][4][5][6]. Some species show clear seasonal differences [5] explained by their phenology [3]. In particular, nitrogen fixing shrubs have lower contents of condensed tannins (CT), while non-nitrogen fixing shrubs usually have higher leaf CT contents [3].…”

Section: Introductionmentioning

confidence: 99%

Field Spectroscopy in the VNIR-SWIR Region to Discriminate between Mediterranean Native Plants and Exotic-Invasive Shrubs Based on Leaf Tannin Content

et al. 2015

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Abstract:The invasive shrub, Acacia longifolia, native to southeastern Australia, has a negative impact on vegetation and ecosystem functioning in Portuguese dune ecosystems. In order to spectrally discriminate A. longifolia from other non-native and native species, we developed a classification model based on leaf reflectance spectra (350-2500 nm) and condensed leaf tannin content. High variation of leaf tannin content is common for Mediterranean shrub and tree species, in particular between N-fixing and non-N-fixing species, as well as within the genus, Acacia. However, variation in leaf tannin content has not been studied in coastal dune ecosystems in southwest Portugal. We hypothesized that condensed tannin concentration varies significantly across species, further allowing for distinguishing invasive, nitrogen-fixing A. longifolia from other vegetation based on leaf spectral reflectance data. Spectral field measurements were carried out using an ASD FieldSpec FR spectroradiometer attached to an ASD leaf clip in order to collect 750 in situ leaf reflectance spectra of seven frequent plant species at three study sites in southwest Portugal. We applied partial least squares (PLS) regression to predict the obtained leaf reflectance spectra of A. longifolia individuals to their corresponding tannin concentration. OPEN ACCESSRemote Sens. 2015, 7 1226A. longifolia had the lowest tannin concentration of all investigated species. Four wavelength regions (675-710 nm, 1060-1170 nm, 1360-1450 nm and 1630-1740 nm) were identified as being highly correlated with tannin concentration. A spectra-based classification model of the different plant species was calculated using a principal component analysis-linear discriminant analysis (PCA-LDA). The best prediction of A. longifolia was achieved by using wavelength regions between 1360-1450 nm and 1630-1740 nm, resulting in a user's accuracy of 98.9%. In comparison, selecting the entire wavelength range, the best user accuracy only reached 86.5% for A. longifolia individuals.

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Utilization of low quality resources by small ruminants in Mediterranean agro-pastoral systems: the case of browse and aftermath cereal stubble

Cited by 79 publications

References 37 publications

A comparative study of the effect of two-stage olive cake added to alfalfa on digestion and nitrogen losses in sheep and goats

A comparative study of the effect of two-stage olive cake added to alfalfa on digestion and nitrogen losses in sheep and goats

Rangeland utilization in Mediterranean farming systems

Field Spectroscopy in the VNIR-SWIR Region to Discriminate between Mediterranean Native Plants and Exotic-Invasive Shrubs Based on Leaf Tannin Content

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