Chemical composition, biological effects of tannin and in vitro nutritive value of selected browse species grown in the West Australian Mediterranean environment

Mahipala, M. B. P. Kumara; Krebs, Gaye; McCafferty, Peter; Gunaratne, L. H. P.

doi:10.1016/j.anifeedsci.2009.06.014

Cited by 30 publications

(8 citation statements)

References 33 publications

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“…The observed positive correlation between NDF and in vitro gas production agrees with that reported for browse species by Kumara Mahipala et al . (). The significant negative effect of CP on total gas volume ( r = −0·39) is, however, in contrast with the expected positive association between CP and in vitro OMD in grasses and browse species (Cilliers and van der Merwe, ; Kaitho et al ., ; Datt et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…A similar negative correlation between CP and in vitro total gas volume in browse species was also reported by Kumara Mahipala et al . (), who considered that this negative effect could be due to high soluble‐nitrogen content. This has been observed to reduce cumulative gas production at the early stages of incubation of substrates with rumen fluid (Cone and van Gelder, ).…”

Section: Discussionmentioning

confidence: 99%

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Chemical composition and in vitro total gas and methane production of forage species from the Mid Rift Valley grasslands of Ethiopia

Bezabih

Pellikaan

Tolera

et al. 2013

Grass and Forage Science

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There is increasing interest in sustainable land use in the tropics to optimize animal production while also reducing methane (CH4) emissions, but information on nutritive value and CH4‐emission potential of tropical forage species is limited. Samples of 24 grasses and five other forages were collected during the main rainy season on randomly positioned quadrats in semi‐arid grassland in the Mid Rift Valley of Ethiopia. Samples were pooled by species, analysed for chemical composition and incubated with rumen fluid to determine total gas and CH4‐emission potentials using a fully automated in vitro gas production apparatus. Organic matter digestibility (OMD) and metabolizable energy (ME) contents were calculated from chemical composition and gas production data. Large variability was observed among forages for all nutritional variables considered. The grasses Eleusine multiflora, Pennisetum stramineum, Dactyloctenium aegyptium, Eragrostis aspera, Cenchrus ciliaris and Eragrostis cilianensis showed relatively high OMD (68–72%) and ME values (9·1–10·2 MJ kg−1 dry matter). Melinis repens, E. multiflora and the non‐legume forb Zaleya pentandra showed relatively low CH4 to total gas ratios; these species may have potential for use in low CH4‐emission forage diets. Acacia tortilis fruits had high content of crude protein and moderate ME values, and may be an ideal feed supplement for the grazing ruminant. Sodium content was below the recommended level for ruminants in all the forage species. Overall, the pasture stand during the main growing season was evaluated as having moderate nutritional quality.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Chemical composition and in vitro total gas and methane production of forage species from the Mid Rift Valley grasslands of Ethiopia

Bezabih

Pellikaan

Tolera

et al. 2013

Grass and Forage Science

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“…(for example, Salem, 2005) and Atriplex spp. (for example, Haddi et al, 2009). Kumara Mahipala et al (2009 used the test to determine IVME of both Acacia spp.…”

Section: Chemical Composition and In Vitro Metabolizable Energy Contementioning

confidence: 93%

“…Consequently, we reasoned that collecting leaves/phylodes from six plants of each species would serve our purpose for this study. Kumara Mahipala et al (2009) also sampled six plants when determining nutritive value of some browse species.…”

Section: Fodders and Collectionmentioning

confidence: 99%

Cafeteria trials to determine relative preference of six desert trees and shrubs by sheep and goats

Degen

El-Meccawi²,

Kam

2010

Livestock Science

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“…A high variation in leaf tannin content is also observed for Australian Mediterranean shrub species from the genus, Acacia. In a study by Kumara et al [9], Acacia saligna, which is also invasive in Portugal, had the lowest tannin content. All of these species occur in a coastal dune ecosystem in southwest Portugal, but have not been studied there, nor concerning their CT content.…”

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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Chemical composition, biological effects of tannin and in vitro nutritive value of selected browse species grown in the West Australian Mediterranean environment

Cited by 30 publications

References 33 publications

Chemical composition and in vitro total gas and methane production of forage species from the Mid Rift Valley grasslands of Ethiopia

Chemical composition and in vitro total gas and methane production of forage species from the Mid Rift Valley grasslands of Ethiopia

Cafeteria trials to determine relative preference of six desert trees and shrubs by sheep and goats

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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