Banca de DEFESA: JOÃO PAULO MATOS PESSOA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: JOÃO PAULO MATOS PESSOA
DATA: 10/12/2025
HORA: 08:00
LOCAL: Auditório prédio da pós-graduação CCA/UFPI
TÍTULO: Analysis of consortia, morphometric evaluation, chemical composition of forage plants and quality of mixed silage from an integrated system.
PALAVRAS-CHAVES: acetic acid, aerobic stability, butyric acid, Cactaceae, climate, effluent losses, Fabaceae, Gliricidia sepium, lactic acid, Opuntia ficus-indica, Pennisetum glaucum, Poaceae.
PÁGINAS: 80
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
ESPECIALIDADE: Avaliação, Produção e Conservação de Forragens
RESUMO:

The objective of chapter I was to conduct a systematic review to analyze the components present in ecosystems of intercropped forage plants for animal production. The prevailing climate in a region, the intercropping system adopted, and the choice of forage species are key factors that can influence both forage and grain biomass in intercropped forage ecosystems. The objective was to analyze the components present in ecosystems of forage plant consortium for animal production in the period from 2014 to 2024. The research question was formulated using the PICo methodology [Population (P), Interest (I) and Context (Co)], with the words related to forage plants as P, intercropping system as I and intercropping system for animal production as Co. Boolean operators were used to construct the search key, namely:  Population: “forage plants”, Interest: “intercropping systems”, and Context: “intercropping systems for animal production”. Articles were searched on the Scopus platform (n = 28), Web of Science (n = 406), and Taylor & Francis (n = 516), totaling 950 articles. Of this total, only 57 articles were selected to be part of this research. The review showed that the country with the most research on the subject was Brazil, with 23 studies, followed by the United States. Intercropping combining Fabaceae - Poaceae accounted for 61.77% of the studies, while 19.12% combined Poaceae - Poaceae and 4.41% combined Cactaceae - Poaceae. Fourteen different climatic domains were observed for the intercropping systems analyzed, most of which were Aw, followed by Bsh and Bsk. Intercropping involving corn, Cactaceae and sorghum were the most productive, regardless of the prevailing climate in the region where the study was conducted. It can be concluded that forage biomass is variable between the climates evaluated, and the predominant forage plant families combinations are Poaceae - Fabaceae, followed by Poaceae - Poaceae, and Poaceae - Cactaceae.

Chapter II addressed the use of cactus (Opuntia ficus-indica), millet (Pennisetum glaucum), and gliricidia (Gliricidia sepium), which offer benefits for intercropping because they have different requirements for water, nutrients, flowering, fruiting, vegetative growth, canopy architecture, and spatial distribution. The objective was to evaluate the morphometric characteristics, forage mass, chemical composition, crude protein export, and total digestible nutrients of forage plants in integrated systems with cactus intercropped with millet and/or gliricidia and subjected to organic and/or mineral fertilization management. The integrated systems were evaluated using a completely randomized design, in a factorial arrangement (3×3), with three fertilization doses: organic (FO); mineral (FM); organic and mineral (FO+FM); and three integration systems: cactus and millet (C+M); cactus and gliricidia (C+G); cactus, gliricidia, and millet (C+G+M), where the means were compared using Tukey's test with a significance level of 5%. There was an interaction (P<0.01) between the factors for crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), and total digestible nutrients (TDN) of the forage palm. The cactus accumulated more CP in the C+G and C+G+M consortia when subjected to management with FM or FO+FM. Millet was competitive and negatively affected the chemical composition of the cactus in the C+M intercropping. CP and TDN exports were different (P<0.05), with the lowest exports occurring in the C+M consortium. FO+FM provides greater forage mass production, CP export, and TDN in the integrated systems. This management also increases the height, number of cladodes, and forage mass of the cactus. The forage mass production of the integrated systems is the same, however the C+G and C+G+M intercropped export more crude protein and total digestible nutrients than the C+M consortium. Chapter III evaluated different mixed silages from integrated systems subjected to organic and mineral fertilization management, cultivated with forage palm, millet, and gliricidia. The objective was to evaluate the chemical composition, microbiology, and quality parameters of mixed silages of cactus, millet, and/or gliricidia. All the forage mass produced, from each forage species, from the area of the integrated systems was ensiled, in order to simulate the real condition of the producer. Nine experimental treatments were established with four repetitions, totaling 36 experimental silos, each silo with a volume of 3.6 liters. The silos were opened 120 days after ensiling. A completely randomized design was adopted, where the means were compared using the Scott-Knott test with a significance level of 5%. The evaluated silages showed differences (P<0.05) for dry matter content, which ranged from 5.98 to 13.45%. There was also a significant difference between the evaluated silages for the parameters: pH, soluble carbohydrates, and organic acids. There was no difference (P>0.05) for the variables ammoniacal nitrogen and aerobic stability between the different silages evaluated. The aerobic stability of the studied silages lasted only 3.0 hours after the silos were opened. It is concluded that integrated systems of cactus intercropped with gliricidia with organic fertilization (C+G+FO), mineral fertilization (C+G+FM), organic and mineral fertilization (C+G+FM+FO), as well as integrated systems cultivated with cactus, millet, gliricidia with mineral fertilization (C+M+G+FM) and mineral/organic fertilization (C+M+G+FM+FO) produce forage that, when ensiled, presents the best quality parameters of fermentative processes, organic acid content, and greater dry matter recovery.

MEMBROS DA BANCA:
Presidente - 2011596 - RICARDO LOIOLA EDVAN
Interno - 1712960 - MARCOS JACOME DE ARAUJO
Externo ao Programa - 2732816 - DANIEL BIAGIOTTI
Externo à Instituição - 025.***.***-08 - FRANKLIN EDUARDO MELO SANTIAGO - IFPI
Externo à Instituição - 857.***.***-91 - HENRIQUE NUNES PARENTE - UFMA
Externo à Instituição - 008.***.***-50 - MARCOS NEVES LOPES - IFCE