Banca de DEFESA: Bruno da Silva Santos

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : Bruno da Silva Santos
DATA : 31/08/2026
HORA: 08:00
LOCAL: Ambiente virtual
TÍTULO:

Rainfed Bean Production in Mato Grosso: Water Variability and Water Deficit Management

PALAVRAS-CHAVES:

Water balance; water stress; Phaseolus vulgaris; proline; rainfall regime

PÁGINAS: 86
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Manejo e Tratos Culturais
RESUMO:

Bean cultivation holds significant agricultural, social, and nutritional importance; it is a traditional food widely consumed by the Brazilian population and a key source of protein, fiber, vitamins, and amino acids. Due to its nutritional value, affordability, and presence in the diets of diverse social groups, its production plays a strategic role in food availability and access, directly contributing to food security. In this context, maintaining stable production is crucial, particularly in rainfed systems, where crop development and productivity depend on rainfall availability and distribution. This dissertation aimed to analyze rainfed bean production in Mato Grosso, characterize water availability conditions for cultivation, and evaluate the effects of water deficit on crop performance. The three studies were conducted in an integrated manner, beginning with the identification of major producing areas, moving to an understanding of the relationship between rainfall patterns and sowing planning, and subsequently experimentally evaluating the effects of water stress on the bean plant. The first article analyzed Municipal Agricultural Production data from 2015 to 2024, revealing a strong spatial concentration of production, particularly in the Sinop intermediate geographic region and the Sorriso immediate geographic region. At the municipal level, Sorriso recorded the highest average production, while Campos de Júlio and Campo Verde stood out for their productivity, highlighting that production volume was more strongly associated with the extent of cultivated area than with yield per unit area. The second article, conducted in Sorriso, identified high interannual rainfall variability and distinct periods of water surplus and deficit. Conditions were favorable for the first crop season; however, for the second crop season, early sowing proved essential to reducing the risk of water deficit, as crops sown after January 12 faced greater exposure to water stress. In the third article, water deficit caused significant reductions in the morphological and productive traits of common beans, with yield losses of up to 80% under severe stress. Foliar application of proline elicited specific physiological responses but did not mitigate the deficit's effects on morphological and productive traits. Overall, the results demonstrate that rainfed bean production in Mato Grosso is conditioned by the interaction of productive, climatic, and physiological factors. Thus, identifying production hubs, properly planning sowing dates, and managing risks associated with water availability are crucial for enhancing yield stability, thereby contributing to the sustainability of agricultural production and strengthening food security in the state.

MEMBROS DA BANCA:
Presidente - 117000004 - MARCO ANTONIO CAMILLO DE CARVALHO
Interno - 131916001 - RIVANILDO DALLACORT
Externo à Instituição - 913.243.941-53 - ADILSON PACHECO DE SOUZA - UFMT