https://repositorio.ifgoiano.edu.br/handle/prefix/147 2026-03-13T09:04:09Z https://repositorio.ifgoiano.edu.br/handle/prefix/6091 Título: RESPOSTAS FISIOLÓGICAS E PRODUTIVIDADE DE MORANGUEIRO CULTIVADO COM BIOESTIMULANTES EM CONDIÇÕES DE DÉFICIT HÍDRICO Autor(es): Oliveira, Ana Paula André de Primeiro Orientador: Silva, Cícero Jose da Abstract: This paper aimed to evaluate the effect of the bioestimulants PROGEN Detox and FERTILEADER Fix NG on the development of strawberry plants under water deficit conditions. The experiment took place in a greenhouse, employing a randomized block design within a split-plot arrangement, comprising three replicates and six plants per subplot, totaling 180 plants. The plot treatments consisted of two biostimulants (PROGEN Detox Br and Fertileader Fix NG), and the subplots received five foliar application doses of 0.0, 0.1, 0.2, 0.3, and 0.4 L ha⁻¹. The transplanted seedlings of the Camarosa cultivar were obtained from a certified nursery and grown in 14.5 L pots, filled up to 5 cm below the rim with fertilized and amended soil according to the plants’ requirements. Irrigation was carried out daily with three pulses per day, maintaining soil moisture close to field capacity. At 40 and 55 days after transplanting, the strawberry plants were subjected to water stress, reducing soil moisture to 50% below the optimal level during the flowering and fruiting stages. The evaluated variables were (a) chlorophyll fluorescence; (b) water use efficiency; (c) photosynthetic and transpiration rates; (d) stomatal conductance; (e) internal and external CO₂ concentrations; (f) electron transport; (g) chlorophyll A and B; (h) floral abortion; and (i) total yield. Physiological and postharvest evaluations were carried out in the morning, from 8 a.m to 11 a.m. Harvesting began at 120 days after transplanting. The following variables were analyzed: (a) fruit diameter and length; (b) soluble solids; (c) pulp pH; and (d) fruit color. Data were subjected to analysis of variance at a 5% significance level. In general, the biostimulants promoted positive physiological responses, such as increased fruit brightness, higher photosynthetic rates, and enhanced external carbon assimilation, especially under water stress conditions. However, they did not significantly influence yield or postharvest quality. The 0.2 L ha⁻¹ dose stood out as the most effective for enhancing the photosynthetic rate during flowering, indicating that biostimulants are a promising technology, although further studies under commercial production conditions are still required. Editor: Instituto Federal Goiano Tipo: Dissertação 2025-11-19T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/5915 Título: POLÍTICAS PÚBLICAS DE INCENTIVO À OLERICULTURA: PERCEPÇÕES, BENEFÍCIOS E LIMITAÇÕES ENTRE PRODUTORES CADASTRADOS NA EMATER DE GOIATUBA - GO Autor(es): Pinto, Diego Santos Almeida Primeiro Orientador: Moraes, Emmerson Rodrigues de Abstract: Public policies to encourage vegetable farming aim primarily to foster the sustainable production of vegetables, promote food security, generate employment and income in rural areas, and encourage environmentally responsible agricultural practices. Since the implementation of programs such as the National Program for Strengthening Family Agriculture (PRONAF), policies directed toward vegetable cultivation have expanded, seeking to align with the country’s productive, socio-environmental, and market needs. These policies also contribute to strengthening family farming, diversifying crops, and increasing the supply of healthy foods in the domestic market. The objective of this study was to investigate the experience of vegetable growers in the municipality of Goiatuba (GO) registered with EMATER, assessing how public policies aimed at the vegetable-farming sector are perceived, what concrete results have been achieved, and which barriers still limit their effectiveness. Understanding how incentives are applied in practice, what their direct impacts are on vegetable production and commercialization, and the challenges faced during their implementation allows for the identification of strengths and weaknesses within the current system. For this research, a qualitative case-study approach was adopted, divided into three main stages. The first consisted of a literature review focused on public policies related to family farming and vegetable production. The second stage involved data collection through the application of a questionnaire administered to vegetable growers. This instrument included questions related to the producers’ demographic profile, level of knowledge about incentive programs, effective participation in public policies, difficulties encountered in accessing and executing these actions, as well as perceptions regarding their socioeconomic and productive impacts. The data were analyzed using Descriptive Statistics, with percentage calculation, tables, and graphs used to systematize the information obtained. The third stage consisted of the development of a Guidance Manual in eBook format, entitled “Guidance Manual for Vegetable Growers,” aimed at disseminating information and best practices identified throughout the study. Editor: Instituto Federal Goiano Tipo: Dissertação 2025-11-10T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/5800 Título: INFLUÊNCIA DA COLHEITA MECANIZADA NA QUALIDADE DO TOMATE AO LONGO DO PERÍODO DE COLHEITA Autor(es): Carmo, Geovana Almeida Primeiro Orientador: Machado, Túlio de Almeida Primeiro Membro da Banca: Megguer, Clarice Aparecida Segundo Membro da Banca: Sousa, Emanoel Di Tarso dos Santos Abstract: In the year 2024, the average productivity of tomato plants in the state of Goiás was 93.423 tons per hectare, making it the state with the highest average productivity in Brazil. The objective of this study was to quantify and qualify the losses caused by the mechanized harvesting process of tomato fruits. The study was conducted in the rural area of the municipality of Morrinhos – GO in an area cultivated under center pivot irrigation. The evaluation was carried out on two harvesters of the Guaresi brand, with a randomized block design, using a factorial scheme of 2x4x7. Four periods during the harvest of the 2024 crop were assessed, with 7 repetitions in each period for fruit collection to be subjected to qualitative analyses: firmness, sphericity, volume, surface area, percentage of fresh mass loss. For the quantitative analyses, 7 plot launches were carried out. Each plot used for sample collection for quantitative analyses had a length of 50 m and a width of 1.8 m (an area of 90 m²). It was concluded that there is variation in the qualitative parameters over time and among fruits harvested by different machines. In terms of quantitative losses, the harvester factor (in isolation) did not influence the losses, but the factor of time and the interaction between times and harvesters do influence these losses. This reveals that the state of conservation and maintenance of the machines can increase or reduce quantitative losses. Editor: Instituto Federal Goiano Tipo: Dissertação 2025-08-25T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/5755 Título: DESEMPENHO DE HÍBRIDOS DE TOMATE INDUSTRIAL EM DIFERENTES ALTITUDES GEOGRÁFICAS Autor(es): Fonseca, Fabrício Henriques Alves da Primeiro Orientador: Perreira, Jardel Lopes Primeiro Membro da Banca: Perreira, Jardel Lopes Segundo Membro da Banca: Pereira, Alexandre Igor de Azevedo Terceiro Membro da Banca: Jakelaitis, Adriano Abstract: Processing tomato is strategic in the agro-industry of the Cerrado regions of Minas Gerais and Goiás; however, climatic variability across elevations and microenvironments complicates the hybrids recommendation that simultaneously deliver yield, soluble solids (°Brix), and stability. Moving beyond simple mean comparisons to approaches that capture genotype × environment interaction (G×E) is essential to reduce agronomic risk, improve industrial efficiency, and guide quality-based contracts. The objective of this study was to quantify performance and stability of four commercial hybrids (HM4890, HM5369, HM7883, and HM4228) along an elevation gradient (850–1,120m) in Minas Gerais and Goiás, and to provide practical recommendations for varietal portfolios and crop management. Trials were conducted in the 2024 season at Patos de Minas (930m), Iraí de Minas (970m), Cristalina (1,120m), and Morrinhos (850m), using a randomized complete block design with five replicates. The following variables were evaluated: yield (kg plant⁻¹), °Brix, vegetative development (crop cycle duration), and plant health (score scale from 1 to 5). Analyses included linear mixed models (genotypes as fixed effects; environments and blocks as random effects), Annicchiarico’s adaptability/stability index, and GGE Biplot. Mixed-model ANOVAs indicated no significant differences among hybrids for yield and °Brix, with a strong environmental contribution. Even so, stability metrics revealed actionable contrasts. Hybrid HM5369 combined the highest mean and stability (broad recommendation). HM4890 expressed productive potential with instability (targeted use in specific contexts), HM4228 highlighted in °Brix (suited to contracts with °Brix premiums), and HM7883 maintained intermediate performance. In the GGE Biplot, the first two principal components explained 98.97% of the variation (PC1 = 60.17% and PC2 = 38.80%). Iraí de Minas (MG) emerged as the most informative test environment, whereas Patos de Minas (MG) showed low discriminating ability. We therefore recommend using Iraí de Minas (MG) as a selection hub and the other sites for complementary validation; adopting an objective-oriented varietal portfolio (HM5369 for volume, HM4228 for °Brix, HM4890 for specific windows/fields); and implementing heat-smart management—with phenophase-regulated deficit irrigation and sensor-guided K/Ca fertigation—to raise °Brix without penalizing yield across the evaluated hybrids. Editor: Instituto Federal Goiano Tipo: Dissertação 2025-08-04T00:00:00Z