CAMARÃO, A. P.

GEROLD, G.

HOHNWALD, S.

TRAUTWEIN, J.

WOLLNY, C.

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Tropentag 2010International Research on Food Security, NaturalResource Management and Rural DevelopmentWorld food system -A contribution from EuropeBook of abstractsEditor: Eric TielkesProgramme committee: Sylvia Dorn, Emmanuel Frossard, Ines IgliMichael Kreuzer, Bernard Lehmann, Michael SiegristEditorial assistance: Andreas Deininger, Katharina ZippForages and feeding systems — Oral PresentationsBiomass Production and Relative Palatability of PossibleSupplementary Forage Plants of the Northeastern AmazonSTEFAN HOHNWALD1, JULIA TRAUTWEIN2, ARI PINHEIRO CAMARÃO3,GERHARD GEROLD1, CLEMENS WOLLNY21Georg-August Universität Göttingen, Department of Landscape Ecology, Germany2University of Applied Sciences Bingen, Department of Agronomy, Germany3Brazilian Agricultural Research Corporation (EMBRAPA), BrazilIn the Bragantina region of north-eastern Pará, Brazil, the sustainability of extensive small-holder pastures is constantly jeopardised by resprouting trees of the native secondary vege-tation. While most trees are feared weeds, some of them might be useful on farms as theyare often completely defoliated, thus obviously palatable to cattle. As these species might becheap supplementary forage alternatives, we compared its leafy biomass production and rela-tive palatability against well-known forage legumes. An on-farm buffet trial was conducted ona 0.5 ha pasture at Igarapé-Açu (47º36´W/1º08´S). Six native species, namely Attalea maripa(Arecaceae), Cecropia palmata (Cecropiaceae), Phenakospermum guyannense (Strelitziaceae),Abarema jupunba, Inga edulis (both Fabaceae), and introduced Tithonia diversifolia (Aster-aceae), Mangifera indica (Anacardiaceae), and Racospermum mangium (Fabaceae) were testedagainst Cratylia argentea and Flemingia macrophylla. Twenty-five saplings of each specieswere planted on 25 m2 plots, repeated eight times in a randomised block design (n=80 plots,n=2000 saplings). After 24 months of establishment time, the buffet trial was grazed by fourmixed-bred steers (mean liveweight: 506 kg; 2AUha-1) for one week. The results showed thatmost tested species had a comparable leafy biomass production and palatability: R. mangium455 kg ha−1 (standard deviation: 429) / consumed biomass: 21%; F. macrophylla 260 (89)/13%; C. argentea 164 (87)/ 40%; P. guianensis 156 (13)/ 1%; M. indica 156 (19)/ 25%; A.jupunba 140 (13)/ 29%; I. edulis 94 (9)/ 8%; C. palmata 88 (20)/ 60%; A. maripa 60 (13)/-%; and T. diversifolia 57 (62)/ -%. The establishment of the buffet trial was problematic andtransplantation of saplings to a soil-compacted pasture can not be recommended to farmersas mortality was high and growth rates were low. For instance, individuals of A. maripa, P.guianensis, and T. diversifolia were still too small to be evaluated for their palatability. How-ever, as most species showed a palatability between the two reference legumes and had an ac-ceptable biomass production, they are interesting supplementary forage plants. Consequently,smallholders possess freely accessible forage alternatives that should be at least tolerated if notfostered on pastures.Keywords: Agro-silvo-pastoral systems, cafeteria trial, cattle browsing, secondary vegetation,smallholdingsContact Address: Stefan Hohnwald, Georg-August Universität Göttingen, Department of LandscapeEcology, Goldschmidtstr. 5, 37077 Göttingen, Germany, e-mail: shohnwa@gwdg.de425

Biomass production and relative palatability of possible supplementary forage plants of the Northeastern Amazon.

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http://www.alice.cnptia.embrapa.br/alice/bitstream/doc/959778/1/p425.pdf

Biomass production and relative palatability of possible supplementary forage plants of the Northeastern Amazon.

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