Banca de QUALIFICAÇÃO: DAIZA ELLEN DA SILVA BORGES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DAIZA ELLEN DA SILVA BORGES
DATE: 23/07/2026
TIME: 14:00
LOCAL: PPGCAP UFAPE
TITLE:

Response of Pearl Millet (Pennisetum glaucum (L.) R. Br.) to the Integrated Use of Plant Growth-Promoting Biological Inoculant and Rock Powder: Agronomic Traits and Soil Nutrient Availability

KEY WORDS:

Pearl millet, Rock remineralizer, Mineral-solubilizing bacteria, Brazilian semiarid

PAGES: 74
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SUMMARY:

Forage production in the Agreste region of Pernambuco, Brazil, is strongly constrained by irregular rainfall, high evapotranspiration rates, low soil cation exchange capacity, and the country's dependence on imported potassium fertilizers. In this context, pearl millet (Cenchrus americanus (L.) Morrone [=Pennisetum glaucum (L.) R. Br.]) has emerged as a forage species well adapted to semiarid conditions due to its relatively short growth cycle, high tolerance to water deficit and elevated temperatures, deep root system, and high water-use efficiency. In parallel, the regulation of rock remineralizers has expanded the prospects for the use of rock powders as alternative nutrient sources, particularly in regions located near mining areas. Therefore, this dissertation aimed to evaluate the agronomic performance of pearl millet subjected to the application of silicate rock powder, applied either alone or in combination with a Bacillus-based plant growth-promoting biological inoculant. The experiment was conducted under greenhouse conditions at the Federal University of the Agreste of Pernambuco, in Garanhuns, Pernambuco, Brazil, using a Regolithic Neosol collected from the municipality of São João, Pernambuco. A randomized complete block design with six treatments and five replicates was adopted over three consecutive growing cycles. Morphophysiological, morphogenetic, and productive traits were evaluated. The results showed that the application of rock powder at a rate equivalent to 60 kg ha⁻¹ K₂O, without inoculation, promoted superior morphogenetic performance compared with the inoculated treatment and, in the third cultivation cycle, increased shoot dry matter yield by 32.6% compared with conventional NPK fertilization. Overall, the results indicate that the rock remineralizer represents a technically viable alternative potassium source for pearl millet, contributing to increased crop productivity, the valorization of regional mineral resources, and reduced dependence on imported potassium fertilizers, thereby reinforcing its potential for sustainable forage production systems in the Brazilian semiarid region

COMMITTEE MEMBERS:
Interno - 1549250 - ALEXANDRE TAVARES DA ROCHA
Interno - 1086602 - JOAO TIAGO CORREIA OLIVEIRA
Externo ao Programa - ***.994.144-** - DANIEL BEZERRA DO NASCIMENTO - UFAPE
Externa ao Programa - 1239610 - RAYANNE THALITA DE ALMEIDA SOUZA - UFAPE