Banca de QUALIFICAÇÃO: BRUNO FERNANDES VENDRAMINI

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : BRUNO FERNANDES VENDRAMINI
DATE: 25/04/2023
TIME: 09:00
LOCAL: Sala de Reuniões
TITLE:

Performance analysis of cassava varieties to the edaphoclimatic conditions of Alcobaça-BA

KEY WORDS:

Cassava; Varieties; Performance; Edaphoclimatic; Diversification

PAGES: 40
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Cassava (Manihot esculenta Crantz) is one of the main energy foods and is highly relevant for the municipalities of the Identity Territory of the Extreme South of Bahia, with emphasis on the municipality of Alcobaça - BA. The main product derived from cassava produced in the region is dry white flour, and the main variety used in this production is known as Caravela. The lack of diversification of commercialized products and the wide use of the Caravela variety by local producers pose risks to the cassava production chain in the region. Studies of the behavior of other varieties that may point to the diversification of products from this crop are necessary to strengthen the cassava production chain in the region. In this sense, the present study aims to analyze the performance of six varieties of cassava to the edaphoclimatic conditions of the municipality of Alcobaça-BA, based on agronomic and chemical characteristics. The cassava varieties used were made available by EMBRAPA together with the local variety, Caravela, the research will result in data that point to the verification of the edaphoclimatic adaptation capacity of these varieties and potential uses that promote the diversification of production, such as the use of cassava in animal feed. The experiment was implemented in November 2021 in the Community of Cana Brava, municipality of Alcobaça, Bahia. To evaluate the agronomic performance and chemical-bromatological composition of both the aerial part and the cassava root, a randomized block design was used, consisting of six cultivars (BRS Tapioqueira, BRS Novo Horizonte, BRS Kiriris, BRS Poti Branca, BRS Formosa and Caravela) and three replications, which were harvested twelve months after planting. In addition to the experiment already implemented, the bromatological characterization of both the aerial part and the root in natura of three varieties of cassava present in the Maniveiro Guardião in the referred municipality, being BRS Amansa Burro, BRS Caipira and Caravela, was carried out to verify the potential of use in animal feed. Data were organized and stored in electronic spreadsheets, with verification and exclusion of outliers, descriptive statistics, chi-square or Fisher's exact test and calculation of Odds Ratio. Tests were performed to verify the ANOVA assumptions, followed by the Student-Newman-Keuls (parametric) or Kruskal Wallis (non-parametric) test; Pearson or Sperman correlation; single and multiple logistic regression analyses. Statistical analyzes used SAS® University Edition and R software at a 5% significance level. The average height of the six varieties was 1.93±0.25 with a relative dispersion of 12.89%. The variety Poti Branca (2.22±0.11 cm) had the highest height and Formosa (1.72±0.33 cm) the smallest. It was verified that there was no difference between the varieties for the evaluated traits (p>0.05), except for the forage production index as a function of the root. The variety that presented the highest root productivity was BRS Novo Horizonte, with an estimate of 28.95 ton/ha, since the lowest productivity was Kiriris with 15.91 ton/ha. The variety that presented the highest yield related to root processing in dry flour was BRS Kiriris with 39%. Regarding the productivity of the final third of the aerial part, the variety that presented the highest volume was Caravela, with an estimate of 5.51 ton/ha and the smallest was the Tapioqueira variety with 2.40 ton/ha. There was a negative correlation between root and starch content (-0.56). In general, all varieties did not show satisfactory results and new plantings and fertilizer formulations must occur for Alcobaça. However, the cassava cultivars Caravelas and BRS Novo Horizonte proved to be the most promising for indication of planting in the locality for the production of flour and starch.

COMMITTEE MEMBERS:
Externo à Instituição - BRUNO OLIVEIRA SOARES
Interno - ***.887.659-** - GERSON DOS SANTOS LISBOA - UFG
Interno - 1932539 - JOAO BATISTA LOPES DA SILVA
Interna - 1156996 - LIVIA SANTOS LIMA LEMOS
Presidente - 1906490 - LUANNA CHACARA PIRES
Interno - 3026285 - RAFAEL HENRIQUE DE FREITAS NORONHA