Chemical composition and digestibility of some browse plant species collected from Algerian arid rangelands
Abstract
Many wild browse and bush species are undervalued mainly because of insufficient knowledge about their potential feeding value. The objective was to evaluate some nutritional attributes of various Algerian browse and shub species (Atriplex halimus, Artemisia campestris, Artemisia herba-alba, Astragalus gombiformis, Calobota saharae, Retama raetam, Stipagrostis pungens, Lygeum spartum and Stipa tenacissima). Chemical composition, phenols and tannins concentration, in vitro digestibility, in vitro gas production kinetics and in vitro bio-assay for assessment of tannins using buffered rumen fluid, and in situ disappearence of the edible parts of the plants (leaves, thin twigs and flowers) were determined. In general, protein content in dicotyledon species was always greater than in monocotyledon grasses, these showing higher neutral and acid detergent fibre and lower lignin contents than dicots. The tannin concentrations varied considerably between species, but in general the plants investigated in this study had low tannin contents (except for Artemisia spp. and S. tenacissima). Monocots showed lower in vitro and in situ digestibilities, fermentation rate, cumulative gas production and extent of degradation than dicot species. The plants were clustered by principal components analysis in two groups: poor-quality grasses and the most digestible dicot species. Chemical composition (neutral detergent fibre and protein) and digestibility were the main influential variables determining the ranking. In conclusion, A. halimus, A. campestris, A. herba-alba and A. gombiformis can be considered of greater nutritional value than the highly fibrous and low digestible grasses (S. pungens, L. spartum and S. tenacissima) that should be considered emergency roughages.
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References
Ammar H, Lopez S, Bochi O, Garcia R, Ranilla MJ, 1999. Composition and in vitro digestibility of leaves and stems of grasses and legumes harvested from permanent mountain meadows at different maturity stages. J Anim Feed Sci 8: 599-610.
http://dx.doi.org/10.1002/jsfa.1635
Ammar H, Lopez S, Gonzalez JS, Ranilla MJ, 2004b. Seasonal variations in the chemical composition and in vitro digestibility of some Spanish leguminous shrub species. Anim Feed Sci Technol 115: 327-340.
http://dx.doi.org/10.1016/j.anifeedsci.2004.03.003
Ammar H, Lopez S, Gonzalez JS, 2005. Assessment of the digestibility of some Mediterranean shrubs by in vitro techniques. Anim Feed Sci Technol 119: 323-331.
http://dx.doi.org/10.1016/j.anifeedsci.2004.12.013
AOAC, 2000. Official methods of analysis, 17th ed., AOAC Int, Washington, DC, USA.
http://dx.doi.org/10.1016/0377-8401(90)90074-I
Barry TN, McNabb WC, 1999. The implications of condensed tannins on the nutritive value of temperate forages fed to ruminants. Br J Nutr 81: 263-272.
PMid:10999013
http://dx.doi.org/10.1007/BF00118213
France J, Dijkstra J, Dhanoa MS, Lopez S, Bannink A, 2000. Estimating the extent of degradation of ruminant feeds from a description of their gas production profiles observed in vitro: derivation of models and other mathematical considerations. Br J Nutr 83: 143-150.
http://dx.doi.org/10.1017/S0007114500000180
Frutos P, Hervas G, Ramos G, Giraldez FJ, Mantecon AR, 2002. Condensed tannin content of several shrub species from a mountain area in northern Spain, and its relationship to various indicators of nutritive value. Anim Feed Sci Technol 95: 215-226.
http://dx.doi.org/10.1016/S0377-8401(01)00323-6
Gasmi-Boubaker A, Kayouli C, Buldgen A, 2005. In vitro gas production and its relationship to in situ disappearance and chemical composition of Mediterranean browse species. Anim Feed Sci Technol 123: 303-311.
http://dx.doi.org/10.1016/j.anifeedsci.2005.04.017
Hagerman AE, Robbins CT, Weerasuriya Y, Wilson TC, McArthur C, 1992. Tannins chemistry in relation to digestion. J. Range Manage 45: 57-62.
http://dx.doi.org/10.2307/4002526
Julkunen-Tiitto R, 1985. Phenolics constituents in the leaves of northern willows: methods of analysis of certain phenols. J Agric Sci 131: 221-228.
http://dx.doi.org/10.1017/S0021859698005577
Larbi A, Smith JW, Kurdi IO, Adekunle IO, Raji AM, Ladipo DO, 1998. Chemical composition, rumen degradation and gas production characteristics of some multipurpose fodder trees and shrubs during wet and dry seasons in the humid tropics. Anim Feed Sci Technol 72: 81-96.
http://dx.doi.org/10.1016/S0377-8401(97)00170-3
López S, Carro MD, Gonzalez JS, Ovejero FJ, 1991. Rumen degradation of the main forage species harvested from permanent mountain meadows in Northwestern Spain. J Agric Sci 117: 363-369.
http://dx.doi.org/10.1017/S0021859600067113
López S, France J, Dhanoa MS, Mould F, Dijkstra J, 1999. Comparison of mathematical models to describe disappearance curves obtained using the polyester bag technique for incubating feeds in the rumen. J Anim Sci 77: 1875-1888.
PMid:10438036
http://dx.doi.org/10.1002/jsfa.2740610205
Menke KH, Steingass H, 1988. Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid. Anim Res Dev 28: 7-55.
http://dx.doi.org/10.1016/S0377-8401(03)00041-5
Mueller-Harvey I, 2006. Unraveling the conundrum of tannins in animal nutrition and health. J Sci Food Agric 86: 2010-2037.
http://dx.doi.org/10.1002/jsfa.2577
Norton BW, 1994. The nutritive value of tree legumes. In: Forage tree legumes in tropical agriculture (Gutteridge C, Shelton H, eds.). CAB Int, Wallingford, UK, pp: 177-192.
http://dx.doi.org/10.1016/j.anifeedsci.2007.03.012
Pascual JJ, Fernandez C, Diaz JR, Garces C, Rubert-Aleman J, 2000. Voluntary intake and in vitro digestibilty of different date-palm fractions by Murciano-Granadina (Capra hircus). J Arid Environ 45: 183-189.
http://dx.doi.org/10.1006/jare.1999.0622
Paterson J, Cohran R, Klopfenstein T, 1996. Degradable and undegradable protein response of cattle consuming forage-based diets. Proc 3rd Grazing Livestock Nutrition Conference (Iudkins MB, Mc Collum III FT, eds.). Proc West Sec Am Soc Anim Sci 47 (Suppl 1): 94-103.
http://dx.doi.org/10.1016/S0031-9422(00)94533-3
Robles AB, Ruiz-Mirazo J, Ramos ME, González-Rebollar JL, 2008. Role of livestock grazing in sustainable use, naturalness promotion in naturalization of marginal ecosystems of southeastern Spain (Andalusia). In: Agroforestry in Europe, Current status and future prospects. Adv Agroforestry vol. 6 (Rigueiro-Rodríguez A, McAdam J, Mosquera-Losada MR, ed). Springer, Netherlands. pp: 211-231.
http://dx.doi.org/10.1016/j.anifeedsci.2004.12.004
Salem AZM, Salem MZM, El-Adawy MM, Robinson PH, 2006. Nutritive evaluations of some browse tree foliages during the dry season, secondary compounds, feed intake and in vivo digestibility in sheep and goats. Anim Feed Sci Technol 127: 251-267.
http://dx.doi.org/10.1016/j.anifeedsci.2005.09.005
SAS Institute Inc, 2008. SAS/STAT® 9.2 User's guide. SAS Inst Inc, Cary, NC, USA.
http://dx.doi.org/10.1016/j.anifeedsci.2005.04.033
Steel RGD, Torrie JH, 1980. Principles and procedures of statistics. McGraw-Hill, NY.
http://dx.doi.org/10.1016/0377-8401(94)90171-6
Tilley JMA, Terry RA, 1963. A two stage technique for the in vitro digestion of forage crops. J Br Grassl Soc 18: 104-111.
http://dx.doi.org/10.1111/j.1365-2494.1963.tb00335.x
Tolera A, Khazaal K, Ørskov ER, 1997. Nutritive evaluation of some browse species. Anim Feed Sci Technol 67: 181-195.
http://dx.doi.org/10.1016/S0377-8401(96)01119-4
Van Soest PJ, 1994. Nutritional ecology of the ruminant. Cornell Univ Press, Ithaca, NY.
http://dx.doi.org/10.3168/jds.S0022-0302(91)78551-2
Waghorn GC, Mcnabb WC, 2003. Consequences of plant phenolic compounds for productivity and health of ruminant. Proc Nutr Soc 62: 383-392.
http://dx.doi.org/10.1079/PNS2003245
Wilson AD, 1977. The digestibility and voluntary intake of the leaves of trees and shrubs by sheep and goats. Aust J Agric Res 28: 501-508.
http://dx.doi.org/10.1071/AR9770501
Yayneshet T, Eik L, Moe S, 2009. Seasonal variation in the chemical composition and dry matter degradability of exclosure forages in the semi-arid region of Northern Ethiopia. Anim Feed Sci Technol 148: 12-33.
http://dx.doi.org/10.1016/j.anifeedsci.2008.02.003
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