Banca de DEFESA: ERCVANIA RODRIGUES COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ERCVANIA RODRIGUES COSTA
DATE: 30/07/2021
TIME: 08:00
LOCAL: ON-LINE
TITLE:

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KEY WORDS:

Clitoria ternatea; Chemical composition; Digestibility; Dry Matter; Legume; Nutritional Value

PAGES: 52
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

The seasonality of forage production throughout the year makes it necessary to conserve excess forage produced at the most favorable time, minimizing the negative impacts on animal productivity. The objective of this study was to evaluate the effects of adding cornmeal on the fermentation profile, losses, nutritional value and aerobic stability of silages of elephant grass genotypes [Cenchrus purpureus (Schumach.) Morrone], intercropped with Cunhã (Clitoria ternatea L.). The experiment was carried out under a completely randomized design (DIC), in a 2 x 2 factorial arrangement, with two elephant grass genotypes (Taiwan A-146 2.37 and IRI-381), harvested at 75 days of regrowth, with and without additive, with four repetitions. The silages were made in PVC mini silos, which were opened 60 days after sealing. Regarding the fermentation profile and losses, there was an effect (P<0.05) of genotype for pH and gas losses (PL), with higher values of both variables for the Taiwan A-146 2.37 genotype. Effects (P<0.05) of corn meal addition were observed for ammoniacal nitrogen (N-NH3/NT), water soluble carbohydrates (WSC), total dry matter loss (TDML) and dry matter recovery (DMR). ), with the additive silages presenting lower values of N-NH3/NT and PTMS and higher WSC and DMR, compared to the silages without corn meal. As for the nutritional value, there was an effect (P<0.05) of the genotype for mineral matter (MM), organic matter (OM) and acid detergent fiber (ADF), with the Taiwan A-146 2.37 genotype showing the highest MM value and lower levels of OM and ADF, compared to IRI-381. There was an effect (P<0.05) of the additive for dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), ADF, cellulose (CEL) hemicellulose (HEM), as well as for in digestibility. in vitro dry matter (DIVDM), with the additive silages presenting higher values of DM, CP and DIVDM, and lower values of NDF, ADF, CEL and HEM. Interaction (P<0.05) genotype x additive for CP was observed, with the highest value for Taiwanese A-146 2.37 silage with additive. All silages lost aerobic stability 48 hours after opening the silos. The amount of additive evaluated was not enough to reach minimum DM levels recommended by the literature to promote an adequate fermentative profile. However, the fermentation profile
parameters (pH and N-NH3/NT) showed that there were no secondary fermentations in both silages. The IRI-381 genotype showed the best fermentation profile in terms of pH and PL. As for the nutritional value of the silage, two genotypes were similar, with the exception of the lower ADF content presented by Taiwan A-146 2.37. The addition of corn meal improved the fermentative profile of the silages, resulting in higher dry matter and water-soluble carbohydrate contents in the silages, thus increasing their dry matter recovery.

BANKING MEMBERS:
Externo à Instituição - EDSON MAURO SANTOS - UFPB
Presidente - 2346742 - ALEXANDRE CARNEIRO LEAO DE MELLO
Interno - 3091000 - VALDSON JOSE DA SILVA