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Additives as preservatives for wrapped round bales silage made under tropical climate

Paillat J.M., Demarquilly C., Blanfort V.. 1997. In : Anon. Proceedings of the XVIIIth international grassland congress = [Actes du XVIIIe congrès international sur les herbages]. s.l. : s.n., p. 1-5. International Grassland Congress. 18, 1997-06-08/1997-06-19, Winnipeg (Canada).

In tropical highlands it is difficult to conserve harvested forage as silage. Tests with molasses as an additive, or using ammonium tetraformiate (ATF) or inoculants have been conducted to find out more about the fermentation process in these conditions. Sugar additives are not the primary factor in the fermentation process. Nevertheless, they are essential to make up for the small amounts of water soluble carbohydrates (WSC) in the forages, but only if the dry matter (DM) content is high enough (27% for temperate species, 40 % for the kikuyu grass). Even at high rates such as 5 l t-1 of fresh matter (FM) AFT is not an effective preservative because it inhibits lactic acid bacteria (LAB). Caylasil, a biological preservative, is only worth using if the forage has a DM content of 30% and 100 - 120 g kg-1 DM of WSC.

Mots-clés : ensilage (produit); préservation; agent de conservation; bactérie lactique; mélasse; région d'altitude; climat tropical

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