Banca de DEFESA: TAMARA NAYANNE MATOS LUSTOSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : TAMARA NAYANNE MATOS LUSTOSA
DATA : 29/07/2019
HORA: 08:30
LOCAL: Auditório da UFRA, Campus de Parauapebas
TÍTULO:

Açaí seed as a moisture sequestering additive in mombaça grass silage

PALAVRAS-CHAVES:

silage, silo, pH

PÁGINAS: 35
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
RESUMO:

The high moisture content of perennial tropical grasses at their ideal cutting point is a major problem when there is an interest of ensiling this material. This makes necessary to use additives that limit this problem. The aim of this study was to evaluate the potential of the açai stone (Euterpe oleracea Mart) as a moisture sequestering additive in Panicum maximum cv. Mombasa and verify its efficiency in animal nutrition. Then were made PVC (polyvinyl chloride) pipe silos with Mombasa grass, added with açaí stone (CA) in the proportions of 0, 50, 100, 150 and 200 g.kg^-1 based on the natural material (MN), thus constituting a completely randomized design (DIC) of 5 treatments with 25 experimental units. The silages were opened after 80 days of ensiling process and the silage samples were analyzed for losses, chemical-bromatological composition, nitrogen fractions, pH, and they will be evaluated on the in vitro digestibility of dry matter (DIVMS), rumen degradable protein (PDR), rumen undegradable protein (PNDR), and short-chain fatty acid profile. The results were evaluated by linear regression analysis using SAS (Statistical Analysis System) software, adopting a 5% probability level for type I error. A linear decrease was observed (P <0.05) for gas (PG) and effluent (PE) losses, as the inclusion of CA in the silage was increased, demonstrating efficiency in the use of CA as a sequestering additive. There was a reduction (P <0.05) in the crude protein (CP) contents of the silage with the inclusion of CA due to the fact that it had a lower concentration of PB in relation to the Mombasa grass, and the silage dilution occurred. Both, Nitrogen ammoniacal (N-NH3) (which is one of the proteolytic fermentation products) and NNP, presented a decrease (P <0.05) in the averages due to the increase of CA inclusion levels. This may be due to the presence of tannins in CA. Based on this, it is considered that the reduction in losses with the inclusion of CA is an indication of the efficiency of the use of CA as a moisture sequestering additive and that the recovery of PB and decrease of nitrogen losses indicate that the CA tannin is efficient in reduce the proteolytic activity during the ensiling process.

MEMBROS DA BANCA:
Presidente - 1894011 - RAFAEL MEZZOMO
Interno - 1839209 - DAIANY IRIS GOMES
Externo ao Programa - 1331235 - THIAGO CARVALHO DA SILVA
Externo ao Programa - 1974294 - ANIBAL COUTINHO DO REGO
Externo à Instituição - ANDRE GUIMARAES MACIEL E SILVA - UFPA