Nutritive value of grasses in semi-arid rangelands of Ethiopia : local experience based herbage preference evaluation versus laboratory analysis

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dc.contributor.author Keba, Habtamu Teka
dc.contributor.author Madakadze, I.C. (Ignacio Casper)
dc.contributor.author Angassa, A.
dc.contributor.author Hassen, Abubeker
dc.date.accessioned 2014-05-06T08:10:23Z
dc.date.available 2014-05-06T08:10:23Z
dc.date.issued 2013-03
dc.description.abstract We examined the nutritive value of common grass species in the semi-arid rangelands of Borana in southern Ethiopia using local experience based herbage preference (LEBHP) perception and laboratory techniques. Local pastoralists in the study area were asked to identify common grass species and rank them according to the species’ preferences and palatability to cattle. The pastoralists listed a total of 15 common grass species which were then sampled during the main rain and cold dry seasons and analyzed for crude protein (CP), Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF) and ash content to verify pastoralists’ claim regarding the quality of individual species. The relative feed value (RFV) and dry matter digestibility (DMD) were also calculated using NDF and ADF contents. Spearman’s rank correlation was used to examine possible relationships between laboratory results and pastoralists’ experience on grass quality. Cenchrus ciliaris, Chrysopogon aucheri, Digitaria milanjiana, Eragrostis papposa and Panicum maximum were the top five species based on LEBHP perception. There were indications of inconsistency in terms of LEBHP perception among the different pastoral communities. The chemical composition of all grass species showed significant (p<0.05) variation between sites, seasons and species. The results showed that the CP values for the Borana rangelands were in the range of 8.7% in the main rain season to 5.1% for the cold dry season. The fiber constituents were relatively low in the main rain season compared to the cold dry season. Overall, Digitaria milanjiana had the highest CP (16.5%) content, while the least was recorded with Heteropogon contortus (10.8) and Aristida adoensis (9.8%) during the main rain season. It seems that the spatial variability of landscapes within the wider geographical regions, soil properties and texture, and land-use patterns probably contributed to site differences in species quality. Generally, the RFV of individual grass species was significantly (p<0.05) varied between and within sites. The ranking of species by pastoralists according to their preferences by cattle was highly correlated with the chemical composition of laboratory results of individual grass species with ‘r’ values for CP (0.94), ash (0.95), NDF (-0.98), ADF (-0.93) and ADL (-0.93). We suggest the complimentary use of LEBHP and laboratory techniques in evaluating the nutritive quality of rangeland forage species for sustainable animal production. en_US
dc.description.librarian am2014 en_US
dc.description.sponsorship The Federal Democratic Republic of Ethiopia, Ministry of Agriculture through Rural Capacity Building Project (RCBP) en_US
dc.description.uri http://www.ajas.info en_US
dc.identifier.citation Keba, HT, Madakadze, IC, Angassa, A & Hassen, A 2013, 'Nutritive value of grasses in semi-arid rangelands of Ethiopia: local experience based herbage preference evaluation versus laboratory analysis', Asian-Australasian Journal of Animal Sciences, vol. 26, no. 3, pp. 366-377. en_US
dc.identifier.issn 1011-2367 (print)
dc.identifier.issn 1976-5517 (online)
dc.identifier.other 10.5713/ajas.2012.12551
dc.identifier.uri http://hdl.handle.net/2263/39712
dc.language.iso en en_US
dc.publisher Asian-Australasian Association of Animal Production Societies en_US
dc.rights © 2013 by Asian-Australasian Journal of Animal Sciences en_US
dc.subject Forage preference ranking en_US
dc.subject Grass nutritive value en_US
dc.subject Relative feed value en_US
dc.subject Semi-arid rangelands en_US
dc.subject Spatial variation in feed quality en_US
dc.title Nutritive value of grasses in semi-arid rangelands of Ethiopia : local experience based herbage preference evaluation versus laboratory analysis en_US
dc.type Article en_US


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