Banca de DEFESA: TAFNES BERNARDO SALES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : TAFNES BERNARDO SALES
DATE: 30/05/2022
TIME: 08:00
LOCAL: Google meet
TITLE:

NUTRITIONAL VALUE OF FORAGE LEGUMES UNDER DIFFERENT CULTIVATION AND MANAGEMENT SYSTEMS

KEY WORDS:

chemical composition, Clitoria ternatea L., Desmanthus spp., digestibility, grass-legume intercropping, productive aspects, Stylosanthes spp.

PAGES: 75
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SPECIALTY: Avaliação, Produção e Conservação de Forragens
SUMMARY:

The objective of this thesis was to evaluate the nutritive value of stylo cv. Campo Grande, butterfly pea and ‘jureminha’ harvested at 60 and 90 days of regrowth; and evaluate herbage production and nutritional value of the butterfly pea intercropped with elephant grass genotypes with different sizes. Greater PB contents were observed in leaves of butterfly pea and jureminha (233 and 219 g kg^-1 DM, respectively), as well as the stems from butterfly pea and stylo cv. Campo Grande (75 and 74 g kg^-1 DM). Leaves of stylo cv. Campo Grande had greater soluble protein fraction (B1 + B2) at 60 and 90 days, as well as the leaves of butterfly pea at 60 days, besides its stems. Greater C fraction, both of carbohydrates (181 g kg^-1 DM) and proteins, at 60 and 90 days (139 and 136 g kg^-1 PB), were verified in leaves of jureminha. Greater coefficients of IVDDM were found in leaves (788 g kg^-1 DM) and stems (481 g kg^-1) of stylo cv. Campo Grande. Regarding the butterfly pea intercropped with elephant grass genotypes, greater contents of PB were verified when the legume was managed jointly with the tall clones, Elephant B and IRI-381 (773 and 763 g kg^-1, respectively). About the carbohydrates contents, the opposite was found, with greater concentrations when the butterfly pea was grown with the dwarf genotypes Mott and Taiwan A-146 2.37 (773 and 763 g kg^-1 DM, respectively). Regarding the IVDDM, butterfly pea stood out in the consortiums with Elephant B, IRI-381 and Taiwan A-146 2.37 (607, 608 and 584 g kg^-1, respectively). Aspects related to the own species influence more consistently the IVDDM, and profiles of carbohydrates and proteins from leaves of tropical forage legumes, compared to the harvesting frequency adopted as management strategy. Conversely, harvesting frequency of 90-day regrowth compromised the nutritive value of stems. Butterfly pea and stylo cv. Campo Grande display greater IVDDM, contents of soluble protein and lower concentrations of indigestible fractions, and because of this, are promisors to be included in different forage production systems. Regarding the intercropped butterfly pea, elephant grass genotypes do not change the herbage production neither the legume’s carbohydrates profile. Shading of tall genotypes affect the nutritive value of butterfly pea, and its content of soluble and non-soluble proteins.

BANKING MEMBERS:
Presidente - 3514546 - MARCIO VIEIRA DA CUNHA
Interno - 2346742 - ALEXANDRE CARNEIRO LEAO DE MELLO
Interno - 1788286 - EVARISTO JORGE OLIVEIRA DE SOUZA
Externo à Instituição - JANERSON JOSÉ COÊLHO - UFRPE
Externa à Instituição - MARIA DA CONCEICAO SILVA - IPA