Banca de DEFESA: MARCIO ANTONIO FORTES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCIO ANTONIO FORTES
DATE: 27/01/2023
TIME: 09:00
LOCAL: INSTITUTO DE ZOOTECNIA
TITLE:

Additives in the silage of elephant grass BRS Capiaçu: fermentative and bromatological characteristics

KEY WORDS:

Keywords: Additive, Nutritional analysis, Bromatological evaluation, Capiaçu, Forage, Silage.

PAGES: 42
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

The production of conserved forage to serve the demand of production livestock farming in seasonal conditions is of fundamental importance to achieve greater efficiency within the production process. Within this context, silage is one of the most viable and used forms of conservation. Generally, the grass has the best nutritional value when young, however, they have low dry matter content, associated with low levels of fermentable carbohydrates and some buffering power. In order to minimize these effects that limit the production of high-quality silage, the objective of this study was to evaluate the results of the use of the pelletized citrus pulp additive, with or without bacterial inoculant, on the fermentative quality of the silage of BRS Capiaçu elephant grass. The studies were carried out at the Institute of Animal Science of the Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil. The climate in the region is AW, tropical hot humid, with a dry period in winter and rainy in summer, according to the Köppen classification. The Elephant grass cultivar BRS Capiaçu was harvested 70 days after the uniformity cut. The experimental drawing used was completely randomized (DIC), consisting of 10 treatments: pure grass, grass + bacterial inoculant, grass + pelletized citrus pulp (5,10,15 and 20% in MN), grass + pelletized citrus pulp (5,10,15 and 20% in MN) + bacterial inoculant, with 4 replications each, composing 40 experimental units. pH, effluent losses, gas losses, dry matter recovery, dry matter, organic matter, mineral matter, ether extract, gross energy, crude protein, neutral detergent fiber, acid detergent fiber, protein acid detergent insoluble, neutral detergent insoluble protein, total carbohydrates, non-fibrous carbohydrates, lignin, cellulose, and hemicellulose. For the statistical analysis, the SISVAR-DES/UFLA software version 5.8 (Build 92) was used, submitting the data to the analysis of variance at a significance level of 0.05 probability. Tukey for the source of qualitative variation (bacterial inoculant) and regression for the source of quantitative variation (doses of pelleted citrus pulp). The silages were made in PVC mini silos, being opened after 90 days, when they were evaluated for chemical-bromatological composition. There was a significant effect (P<0.01) for pH values at different levels of addition with citrus pulp, however, no regression equation was adjusted, observing values between 3.44 and 3.59, all values for pH are within the ideal range for good quality silages, interaction between the factors for OM, MM and EE was observed, a quadratic effect was observed in the presence of the inoculant for OM and MM, with a minimum estimate of 92.87% OM and a maximum estimate of 7.13% MM, there was an increasing and decreasing linear effect in the absence of the inoculant for OM and MM, respectively, with an increase of 0.15% OM and a decrease of 0.15% MM for each 1% inclusion with citrus pulp pelleted , a quadratic effect was observed in the absence of the inoculant for EE, with a minimum average estimate of 1.98% EE, and there was a decreasing linear effect in the presence of the inoculant, with a reduction of 0.02% EE for each 1% inclusion of citrus pulp , an interaction effect was also observed between the factors for CP, LIG, TC and EW, no equation was adjusted for the estimates for CP, which had averages between 6.76 and 7.29, there was a quadratic effect in the absence of the inoculant for average values for LIG, being estimated maximum average of 7.24% LIG, already in the presence of inoculant was not found equation to estimate values for LIG, there was a quadratic effect in the presence or absence of inoculant for TC, with minimum estimate of 83.48% TC and maximum of 84.33% TC, respectively, quadratic effect was observed in absence of the inoculant for EW, with a minimum estimate of 0 Kg.ton-1 for EW, and decreasing linear effect in the presence of the inoculant, with a reduction of 1.65 Kg.ton-1 PE for each 1% inclusion of pelleted citrus pulp . The inclusion of pelleted citrus pulp resulted in an increasing linear effect for NFC, DM, NDIP and ADIP, with an increase of 1.27% NFC, 0.5% MS, 0.28% NDIP and 0.14% ADIP for each 1% addition of citrus pulp, a decreasing linear effect was observed concerning the levels of inclusion with citrus pulp pellets for the values of NDF, ADF, HEM and CEL, with a decrease of 1.23% NDF, 0.62% ADF, 0, 62% HEM and 0.58% CEL for each 1% inclusion of pelleted citrus pulp. The inclusion of 10 to 20% of pelleted citrus pulp, based on the natural material of the BRS Capiaçu elephant grass, was able to minimize losses through effluents and provide an increase in fermentable carbohydrates, improving the nutritional quality of the silages. 

COMMITTEE MEMBERS:
Externo ao Programa - 3157825 - ADENILSON JOSE PAIVA - nullExterna à Instituição - AMANDA NUNES ASSIS DOS ANJOS - UFSC
Externo à Instituição - FÁBIO TEIXEIRA DE PÁDUA - IFRJ