Quality of yellow passion fruit silage in the pure forms and in mixture with additives. / Qualidade da silagem do resÃduo do fruto de maracujà amarelo nas formas pura e em mistura com aditivos

AUTOR(ES)

Arnaldo Prata Neiva JÃnior

DATA DE PUBLICAÇÃO

2005

RESUMO

Brazil possesses a huge amount of residues and by-products of agriculture and of agroindustry with potential of use in ruminant feeding. A few limitations may cause some of these additives to have a more restricted utilization, among them the low percentage of DM, which impairs ensiling process, demanding the adoption of procedures which modify that picture such as the use of additives. In this way, the present work is intended to determine the bromatologic composition and the digestibility of yellow passion fruit residue silages, both pure and in mixtures with different additives. The residues wee ensiled in experimental PVC silos, fitted with Bunsen-type valves with a capacity of about 3 kg each. The treatments consisted of three additives ( sugar cane bagasse, coffee hulls and corn cob) at four levels (10, 15, 20 and 25%) plus a check without additives. The experimental design utilized was the completely randomized, making a factorial scheme with an additional treatment [(3 x 4) + 1] with four replicates. The silages in which BC was added and the silages with 100% of yellow passion fruit residue presented a DM content inferior to those recommended for a good silage. The additive CC was the only which increased the protein content of the silages. SM was the one which contributed the most to the reduction of EE contents and increase of LIG of the silages. The three additive increased the NDF and ADF contents of the silages when they were added at the different levels. All the silages presented values of pH and N-NH3 (% total N) according to the standards which characterize a good fermentation. The silages with 100% of passion fruit residue and either with BC or with CC added at the different levels, presented values of IVDDM close to those of tropical forages, showing to be viable alternative in ruminantsâ feeding in regions with availability of those feeds.

ASSUNTO(S)

silage yellow passion fruit maracuja; resÃduo agroindustrial; nutriÃÃo de ruminante; silagem agricultural wastes zootecnia rumiant nutrition

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