Effect of moisture absorbents, chemical and microbial additives on the nutritional value, fermentative profile and losses of Brachiaria brizantha cv. Palisadegrass silages

Revista Brasileira de Zootecnia

Schmidt, Patrick²  Queiroz, Oscar Cezar Muller¹  Nussio, Luiz Gustavo¹  Santos, Mateus Castilho¹  Ribeiro, José Leonardo¹  Mourão, Gerson Barreto¹ 

[1] USP;UNESP/Registro

关键词: ammonium formate;    effluent;    formic acid;    gases;    lactic acid;    sodium benzoate    Introdução A estacionalidade da produção de forragem torna sua conservação necessária;    visto que a escassez de alimento no inverno contribui para variação intra-anual do preço da carne bovina;   

DOI  :  10.1590/S1516-35982009000200003

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this trial was to evaluate the nutritional value, fermentation profile and dry matter losses of Palisadegrass silages ensiled with either dried citrus pulp, soybean hulls, chemical or microbial additives. The trial was carried out in a completely randomized experimental design and in a factorial arrangement (3 × 5), with three dry matter levels (wet forage or forage ensiled with pelleted citrus pulp or pelleted soybean hulls) and five additives (without or with the presence of bacterial inoculants or the addition of: sodium benzoate, formic acid in the concentration of 62% or 44%), totalizing 15 treatments and 60 experimental silos. The variables analyzed were: nutritional value, losses due to gases and effluents, and dry matter recovery. The use of dried citrus pulp or soybean hulls at the ensiling time increased the dry matter content (29.4 and 28,9%) and decreased the effluent production (4.1 and 3.8 kg/t of fresh matter), also providing fermentable substrate to microorganisms, resulting in increased fermentation coefficient and digestibility of silages. The use of formic acid resulted in silages with higher digestibility and increased water-soluble carbohydrates and crude protein content. This additive was also effective in reducing the losses due to gases and, as a result, increased the total dry matter recovery. The treatment containing homolactic bacteria showed similar trend of increasing the digestibility and reducing the losses due to gases. The use of sodium benzoate was less effective in altering the fermentation pattern of tropical silages. The nutritional value and total dry matter losses of silages ensiled without additives can be considered satisfactory. However, wet forage ensiled with dried citrus pulp and, mainly, with soybeans hulls showed the best results. Treatments containing formic acid had a beneficial effect on the fermentation profile of tropical grass silages.

【 授权许可】

CC BY-NC