Banca de QUALIFICAÇÃO: GISLANE MENDES GALINDO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : GISLANE MENDES GALINDO
DATE: 24/02/2022
TIME: 09:00
LOCAL: Plataforma Google Meet
TITLE:

Characterization of exotic forage legumes for feeding ruminants in the Brazilian semiarid region

KEY WORDS:

Digestibility; fractionation; methane

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

Livestock is of great importance in the semiarid region of Brazil, presenting a lower risk when compared to grain production agriculture due to intra and interannual variations in precipitation. However, this variation also affects the production of forage used in animal feed. In arid and semi-arid regions, the irregularity of rainfall and the low availability of fresh water can limit the development of a competitive and economically viable livestock. production systems. When considering the importance of conserving food in order to preserve as much as possible what the food contained in its in natura form, the objective was to estimate the nutritional value of silages and hays of two forage species: leucena (Leucaena leucocephala Lam.) and gliricidia (Gliricidia sepium (Jacq.) Steud.), from chemical composition, carbohydrate and protein fractionation, rumen degradation and fermentation parameters, in vitro dry matter digestibility and ruminal and post-rumen protein degradation. The samples were collected, in four replications per species, in the experimental field of Caatinga, belonging to Embrapa Semiárido (CPATSA), in the city of Petrolina-PE. Carbohydrate and protein fractionation was performed using the Cornell Net Carbohydrate and Protein System (CNCPS). The evaluation of the degradation of organic matter and products of ruminal fermentation was carried out using the semi-automatic in vitro technique of gas production. Ruminal degradability and intestinal protein digestibility were estimated using the three-stage technique. In conclusion, the PDR content and the fraction A of the protein fractionation were higher in the silages than in the hays when compared to the in natura forages, whereas the fraction A+B1 of the carbohydrate fractionation was higher in the hays. These results indicate the possibility of using these silages as a source of readily available N for use by rumen microorganisms. And the use of hay as a source of protein protected from rumen degradation and made available in the intestine and of readily fermentable carbohydrates. Gliricidia and leucaena showed high digestibility potential and methane production did not differ between the studied forms.

BANKING MEMBERS:
Presidente - 1544538 - ANDRE LUIZ RODRIGUES MAGALHAES
Externa à Instituição - KELLY CRISTINA DOS SANTOS
Externa à Instituição - RAYANNE THALITA DE ALMEIDA SOUZA - IFPI