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Potential mineral deficiencies for Ndama cattle grazing Urochloa sp. based tropical pastures in the Bas-Congo province of the Democratic Republic of Congo
Picron, Pascale; Goubau, Amaury; Lecomte, Thomas et al.
2011In Advances in Animal Biosciences, 2 (2), p. 388
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Keywords :
mineral deficiencies; grazing cattle; urochloa
Abstract :
[en] Artificial pastures are used to increase carrying capacity in the wet tropics by supplying higher quality forage (energy and protein) to the animals all year long. Sowing pastures is labour-intensive so to be profitable all other possible growth limiting factors, especially minerals, should be alleviated. We studied nutrients intake (energy, protein and minerals) in cattle grazing Urochloa sp. pastures in Western DRC. Three Urochloa ruziziensis and 3 U. decumbens pastures in Kolo-Fuma (Bas-Congo, DRC) were studied. Three Ndama steers and 3 cows grazing each pasture consecutively during the short rainy and dry seasons were followed by handplucking and samples were analysed for energy, crude protein and ash to calculate energy value (fodder units, FU) and digestible crude protein content (DCP) of the diets. NIRS was used on faeces to determine dry matter (DM) intake and ICP-AES to determine mineral content of the diets. Intake levels reached 66 ± 4.3 g kg-1LW0.75, nutritive value of forage was 0.701 ± 0.036 FU and 4.78 ± 1.04 % DCP, allowing daily weight gains > 550 g for steers and > 350 g for cows. P, Ca, Mg, K, Mn & Fe were provided above requirements by the pasture. Na, Cu and Zn were deficient, especially during the short dry season for Cu and Zn. U. ruziziensis pastures tended to provide more minerals, especially during the rainy season. A mineral supplement providing Na, Cu and Zn is required to reach the daily weight gains allowed by energy and protein supplies. The supplement could reasonably be similar for U. decumbens and U. ruziziensis pastures, but the dry season formula should provide more Cu and Zn than the rainy season formula
Disciplines :
Animal production & animal husbandry
Author, co-author :
Picron, Pascale ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Goubau, Amaury ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Lecomte, Thomas;  Société d'Elevage du Bandundu occidental
Romnée, Michel;  Walloon agricultural Research Centre
Bindelle, Jérôme  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Decruyenaere, Virginie;  Walloon agricultural Research Centre
Beckers, Yves  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Stilmant, Didier;  Walloon agricultural Research Centre
Language :
English
Title :
Potential mineral deficiencies for Ndama cattle grazing Urochloa sp. based tropical pastures in the Bas-Congo province of the Democratic Republic of Congo
Publication date :
2011
Event name :
8th International Symposium on the Nutrition of Herbivores
Event place :
Aberystwyth, United Kingdom
Event date :
from 06-09-2011 to 09-09-2011
Audience :
International
Journal title :
Advances in Animal Biosciences
ISSN :
2040-4700
Publisher :
Cambridge University Press, Cambridge, United Kingdom
Volume :
2
Issue :
2
Pages :
388
Peer reviewed :
Peer reviewed
Funders :
Société d'Elevage du Bandundu occidental
Available on ORBi :
since 01 September 2011

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