DSpace Communidade: Programa de Pós Graduação em Ciências Agrárias - Agronomia (PPGCA - AGRO)

AGRICULTURA VERTICAL DE PRECISÃO APLICADA A MICROVERDES DE LENTILHA E GERGELIM: TELEMETRIA AUDITÁVEL, MANEJO LUMINOSO E EFICIÊNCIA ENERGÉTICA DA PRODUÇÃO DE BIOMASSA

2026-07-02T19:31:23Z

Título: AGRICULTURA VERTICAL DE PRECISÃO APLICADA A MICROVERDES DE LENTILHA E GERGELIM: TELEMETRIA AUDITÁVEL, MANEJO LUMINOSO E EFICIÊNCIA ENERGÉTICA DA PRODUÇÃO DE BIOMASSA Autor(es): Silva, Marlus Dias Primeiro Orientador: Silva, Fabiano Guimarães Abstract: This thesis investigated artificial lighting strategies and digital infrastructure applied to precision vertical farming, with emphasis on microgreens cultivated under controlled environment conditions. The work integrated two main axes: the evaluation of light spectra and temporal lighting regimes on the physiological and productive performance of microgreens, and the development of an open and auditable IoT architecture for control, monitoring, and experimental data recording in indoor cultivation systems. In the study with lentil microgreens, constant lighting regimes, especially under red, white, and RBW light, favored biomass production and energy efficiency, whereas the Gaussian regime showed greater potential to stimulate carotenoid accumulation. In the study with sesame microgreens, the Precision Vertical Farming System (PVFS) was developed and validated, enabling the execution of dynamic PPFD profiles, environmental and electrical telemetry recording, and the integration of metrics such as Areal Energy Consumption (AEC), Specific Energy Consumption (SEC), and Energy-to-Mass Efficiency (EEMS). The results demonstrated that DLI equivalence does not guarantee equivalent energy performance, with the Red–Constant treatment showing the best energy–biomass relationship. This thesis contributes by demonstrating that precision vertical farming must integrate biological response, energy efficiency, and digital traceability to achieve greater experimental robustness, reproducibility, and operational rationality. Editor: Instituto Federal Goiano Tipo: Tese

DIAGNOSE DA COMPACTAÇÃO DO SOLO: ABORDAGENS METODOLÓGICAS NA PENETROMETRIA E TEXTURA

2026-06-25T18:35:24Z

Título: DIAGNOSE DA COMPACTAÇÃO DO SOLO: ABORDAGENS METODOLÓGICAS NA PENETROMETRIA E TEXTURA Autor(es): Souza, Ítalo Rômulo Mendes de Primeiro Orientador: Severiano, Eduardo da Costa Primeiro Membro da Banca: Costa, Kátia Aparecida de Pinho Segundo Membro da Banca: Rezende, Alexandre Garcia Terceiro Membro da Banca: Ferreira, Camila Jorge Bernabé Abstract: Soil compaction is one of the main forms of physical degradation associated with the agriculture intensification in tropical environments, compromising root growth, hydrological functioning, the ecosystem services provision, and the agricultural systems sustainability. Despite its relevance, the diagnosis of soil compaction still represents a methodological challenge, mainly due to the limitations inherent in traditionally used indicators, such as soil resistance to penetration and conventional textural characterization, especially in highly weathered soils. In this context, this thesis aimed to evaluate methods for diagnosing soil compaction in tropical environments, with emphasis in the limitations associated with mechanical resistance, textural characterization, and estimation of soil compressive behavior. The research was structured in two complementary chapters. In the first one, soil resistance to penetration was evaluated in the field and in laboratory conditions, based on a database from tropical agroecosystems distributed across different edaphoclimatic regions. The results indicated a high frequency of values considered restrictive to root penetration in field assessments, concentrated predominantly in the surface layers of the soil. However, it was found that the resistance measured in situ shows high spatial and temporal variability, as well as a tendency to overestimate mechanical impedance, reflecting its strong dependence on water content, texture, and structural heterogeneity of the soil. In contrast, laboratory measurements showed greater diagnostic consistency, especially when associated with more stable structural indicators, such as relative soil density and pore system organization, demonstrating that penetration resistance should be interpreted as a complementary functional indicator rather than an isolated diagnostic criterion. In the second chapter, pedotransfer functions were developed to estimate the preconsolidation pressure of Brazilian soils representative of tropical environments, based on easily obtained physical, chemical, and mineralogical attributes. The statistical models obtained had high explanatory power, demonstrating that the compressive behavior of tropical soils is strongly controlled by the interaction between soil water content and fine fraction content, reflecting the combined influence of texture, mineralogy, and structural organization. The results also indicated that these soils have low load-bearing capacity, making compaction practically inevitable under mechanized traffic, even under apparently favorable moisture conditions. Taken together, the findings in this thesis show that soil compaction in tropical environments is a recurring structural condition, conditioned both by intrinsic soil factors and by the methodological limitations of the indicators used in its assessment. It is concluded that the diagnosis of compaction requires an integrated approach between the field and the laboratory, combining the identification of impeding layers with the structural and compressive characterization of the soil, as well as the judicious use of predictive models, contributing to more efficient management decisions and the physical sustainability of tropical agricultural systems. Editor: Instituto Federal Goiano Tipo: Tese

BIOPROSPECÇÃO E POTENCIAL DE MITIGAÇÃO DO DÉFICIT HÍDRICO NA SOJA POR BACTÉRIAS PROMOTORAS DE CRESCIMENTO DE PLANTAS

2026-06-19T20:07:38Z

Título: BIOPROSPECÇÃO E POTENCIAL DE MITIGAÇÃO DO DÉFICIT HÍDRICO NA SOJA POR BACTÉRIAS PROMOTORAS DE CRESCIMENTO DE PLANTAS Autor(es): Tavares, Germanna Gouveia Primeiro Orientador: Costa, Alan Carlos Primeiro Membro da Banca: Silva, Adinan Alves da Segundo Membro da Banca: Müller, Caroline Terceiro Membro da Banca: Moura, Jadson Belém de Abstract: Soybean (Glycine max) is one of the most important agricultural commodities for global food supply; however, it frequently experiences yield losses due to environmental stresses, particularly drought. In addition, the crop has high nutritional requirements to achieve productivity levels that meet the growing global demand for food. This study investigated the potential of plant growth–promoting rhizobacteria (PGPR) to mitigate the drought effects in G. max and to enhance plant development. Initially, in vitro assays were carried out to identify functional traits of the bacteria, followed by genetic characterization. Based on this screening, 11 bacterial isolates, identified as belonging to the genus Bradyrhizobium spp., were selected according to the evaluated functional traits. Subsequently, two greenhouse experiments were carried out to simulate field conditions. The first experiment aimed to select bacteria with the greatest potential to promote the growth of inoculated plants, while the second evaluated the ability of these bacteria to enhance plant tolerance to water deficit. In both experiments, gas exchange, chlorophyll a fluorescence, photosynthetic pigments, and plant growth were assessed under well-watered and water-stress conditions, with and without inoculation using native or commercial bacteria, in addition to morphological evaluations of shoot and root systems. The results indicated that plant growth–promoting bacterial strains improved photosynthetic rates, electron transport efficiency, and root growth under both well-watered and drought stress conditions. Editor: Instituto Federal Goiano Tipo: Tese

FUNGOS ENTOMOPATOGÊNICOS PODEM ALTERAR O COMPORTAMENTO ALIMENTAR DE Euschistus heros EM SOJA?

2026-04-29T21:05:47Z

Título: FUNGOS ENTOMOPATOGÊNICOS PODEM ALTERAR O COMPORTAMENTO ALIMENTAR DE Euschistus heros EM SOJA? Autor(es): Oliveira, Guilherme Pereira de Primeiro Orientador: Soares, Frederico Antonio Loureiro Primeiro Membro da Banca: Velozo, Simone Graziele Moio Segundo Membro da Banca: Jesus, Flávio Gonçalves de Terceiro Membro da Banca: Boaventura, Heloiza Alves Abstract: The Neotropical brown stink bug, Euschistus heros, is one of the main pests of soybean, causing significant losses through feeding on pods and seeds. Understanding its feeding behavior is essential for the development of effective pest management strategies. Although entomopathogenic fungi have been widely studied as biological control agents, their effects on insect feeding behavior remain poorly understood. This thesis aimed to evaluate whether entomopathogenic fungi are capable of altering the feeding behavior of E. heros in soybean. To address this question, three complementary studies were conducted, integrating statistical modeling, behavioral analysis using electropenetrography (EPG), and seed damage assessment. The first study focused on the statistical modeling of EPG data, which are characterized by correlated and overdispersed count variables. A multinomial-based approach showed superior performance, with appropriate control of type-I error rates (≈ 0.05) and higher statistical power (> 0.80), whereas conventional models such as Poisson exhibited inflated error rates (> 0.40). The second study evaluated the feeding behavior of E. heros exposed to Cordyceps javanica and Metarhizium anisopliae using EPG. Significant changes (p < 0.05) were observed, including reductions in stylet penetration (Eh1) and ingestion events (Eh2 and Eh3b), increased non-feeding time (Z), and a reduction in the final time of the last probe (FTLP), from 44.09 ± 4.13 h in the control to approximately 31 h in fungal treatments. The third study linked these behavioral changes to seed damage. X-ray analysis revealed a significant reduction in internal seed damage (p < 0.05), from 65.5% in the control to 27.8% for M. anisopliae and 34.4% for C. javanica. Overall, the results demonstrate that entomopathogenic fungi are capable of altering the feeding behavior of Euschistus heros in soybean by reducing the frequency, duration, and continuity of feeding events. Editor: Instituto Federal Goiano Tipo: Tese