Tortas de nabo forrageiro (Raphanus sativus) e de pinhÃo manso(Jatropha curcas): CaracterizaÃÃo e utilizaÃÃo como aditivos na ensilagem de capim elefante / Turnip (Raphanus sativus) and phisic nut (Jatropha curcas) cakes: characterization and use as additives in elephant grass silage

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

With the advent of biodiesel new by-products are being produced, bringing the need of studies about the viability of use of these alternative feed sources. The experiment was carried out in the Laboratory of Animal Nutrition of the Federal University of Lavras (UFLA) and with the objective to determinate the chemical composition and the in vitro dry matter digestibility of turnip (TNF) and physic nut (TPM) cake and the evaluation of the effects of the addition of these by-products upon the quality of elephant grass silage. The by-products were ensiled in experimental PVC silos, fitted with Bunsen-type valves and approximately 4kg of capacity. The experiment was installed under a completely randomized design with three replicates, and the treatments were arranged in a scheme of subdivided parcels in the time. The parcel treatments were in a factorial scheme 2x3 (2 types of cake â turnip and physic nut; 3 inclusion levels of cakes â 3, 6 e 9%) and one more additional treatment (pure grass). The data were analyzed using the Statistical Analysis System software (SAS, 1999). The values of DM, EE, CP, NDF, ADN, NDIN, ADIN, ASH, CEL, LIG, BP, IVDMD, N-NH3, pH, Ca e P were determined. There was effect (P<0,05) of the inclusion levels of cakes in the silages DM values, however, none of the treatments provided a DM value considered ideal for the attainment of a good silage. There was effect of the inclusion levels upon the CP and EE values of the silage, and those ones containing TNF showed higher values when compared with the ones containing TPM. The average values of NDF and ADN decreased with the addition of the cakes in the different levels, and the smallest average values were found in the silages containing 9% of TNF. The silages containing TNF presented NDIN values bigger than those found in the silages with TPM. The ADIN values of all the treatments were in accordance with the recommended ones. There was effect of the addition of the cakes upon the LIG values. All of the treatments with TNF had pH values considered ideals for a good silage, and those with TPM, only the treatment with 6% of this cake showed the same effect. In all the treatments, except that containing 9% of TPM, the N-NH3 values were great for a good silage. The IVDMD decreased with the addition of the cakes in the increasing levels, and in the silages with TPM, the reduction was higher than the others. According to the chemical composition of the cakes, they seemed to have potential to use for animal nutrition. The cakes provided different chemical characteristics for the silages, in the levels that were used, and it indicates that the cakes should be used in different ways, and the TNF showed the best chemical composition, the best digestibility and provided silages with better quality.

ASSUNTO(S)

zootecnia silagem. raphanus sativus jatropha curcas pennisetum purpureum

ACESSO AO ARTIGO

Documentos Relacionados