AvaliaÃÃo da Saccharina enriquecida com diferentes fontes de amido / Evaluation of Saccharina enriched with different sources of starch

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The experiments were accomplished in the Animal Science Department of the Universidade Federal de Lavras, MG, the objectives of which were to evaluate the saccharina production process with different sources of starch by additivating elephant grass silage, fermentation dynamics and its digestibility in diets using crossbred steers. Experiment 1 was designed to evalaute the fermentation profile and the nutritional value of elepahnt grass silage additivated with saccahrine containing different sources of starch . The experimental design utilized was the completely randomized, with 6 treatmetns and three replicates amounting to 1 8 laboratory silos,allocated to the follwing treatments, SMI, + 20% Saccharine + cassava + silage, SBD + 20% Saccharina + sweet potato + silage, SML + 20% Saccharina + corn + silage, SSO + 20% Saccharina + sorghum + silage, SRM + 20% Saccharina + cassava scratch + silage, SCN - elephant grass silage, which were utilized and the chemical composition of the final product was evaluated. Experiment 2 was performed with the objectoive of evaluating the fermentation dynamics during the production process of saccharina additivated with different sources of starch. The utilized design was the completely randomized, allocated to the follwing treatements: SCA â Saccharina without an additive, SMI â 71.5% of Saccharina with 28.5% of corn, SSO- 68.2% of Saccharina with 31.8% of sorghum and SMT â 68.5% of Saccharina with 31.5% of millet, aiming that the final product presented the same starch content as a corn silage. In experiment 3, the following treatments were utilized: SCA â Saccharina without an additive , SMI â 71.5% of Saccharina with 28.5% of corn, SSO- 68.2% of Saccharina with 31.8% of sorghum and SMT â 68.5% of Saccharina with 31.5% of millet, their being made up this way with the purpose that the final product showed the same content of starch as a corn silage. Experiment 3 was intended to evaluate the intake of dry matter, digestibiality coefficient and excretion of chromium oxide utilizing an experimental design in two 4 x 4 Latin squares ( four animals and four periods ) allocated to the following treatments: SMI, + 20% Saccharine + cassava + silage, SBD + 20% Saccharina + sweet potato + silage, SML + 20% Saccharina + corn + silage, SSO + 20% Saccharina + sorghum + silage, SRM + 20% Saccharina + cassava scratch + silage, SCN elephant grass silage . The statistical significance was evalauted by Tukeyâs test (P<0.05) by the SAS statistical.software For the first experiment, it was concluded that taking into account the influence of the additive during the ensiling process of elephant grass additivated with 69.65 of saccharina and 30.4% of whole cassava, this sort of saccharina proved to be made up of the best contents of pH, dry matter, crude protein , NDF , ADF, BC and N-NH3 and (% of total N) in its chemical composotion as compared with the other saccharinas For the second experiment, it follows that, on adding sources of starch to saccahrina during the process of its production , a longer fermentation time will be necessary and thus, to best define the chemical indicatives. The use of a source of starch is important during saccharina production, since this process promotes dilution of fiber and improves crude fiber content. For the third experiment, it follows that on adding different sources of starch during saccharina production takes place a greater increase in the intake of the diets observing the results of digestibility coefficient ,it is concluded that regardless of the starch source utilized, these coefficients presented the same behavior as regards chromium oxide excretion, it is found that the largest excretion observed was for the non-additivated saccharina probably as related with the incomplete mixture with the ruminal digesta and of the fast passage thorugh the rumen as related with the fibrous material.

ASSUNTO(S)

silagem zootecnia perfil de fermentaÃÃo adictive digestibility silage saccharina digestibilidade. saccharina fermentation amido starch aditivo

ACESSO AO ARTIGO

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