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Caracterização da fermentação e deterioração aeróbia de silagens de planta inteira de milho inoculada com cepa epifítica de Lentilactobacillus farraginis
(Universidade Federal de Lavras, 2025-12-22) Souza, Viviane Camila de; Ávila, Carla Luiza da Silva; Carvalho, Beatriz Ferreira; Chizzotti, Fernanda; Batista, Luis Roberto; Fernandes, Tatiane
With the objective of evaluating the inoculation of epiphytic lactic acid bacteria (LAB) strains in whole-plant corn silage, two studies were conducted. In the first study, the effects of inoculation with Lentilactobacillus farraginis (LF), Lentilactobacillus hilgardii (LH – CCMA 0170), and Lactiplantibacillus plantarum (LP), applied individually or in coculture, on the fermentative characteristics and aerobic stability of corn silage were evaluated at two storage periods (15 and 68 days). The added inoculants were: control (without inoculant), LF, LH, LF+LH, and LF+LH+LP. Inoculation with LF and with the LF+LH+LP combination resulted in lower dry matter (DM) losses during fermentation. All inoculated silages showed higher concentrations of 1,2-propanediol and greater LAB populations. In addition, the treated silages exhibited greater aerobic stability, characterized by a longer time to reach maximum temperature and a lower maximum temperature, in both storage periods compared with the control. During the aerobic stability evaluation, the LF and LF+LH+LP treatments showed lower DM losses. The results indicate that inoculation with heterofermentative strains, especially L. farraginis in combination with other lactic acid bacteria, promotes better preservation of corn silage, prolongs aerobic stability, and reduces DM losses. In the second study, the effect of the epiphytic strain Lentilactobacillus farraginis on chemical composition, fermentative characteristics, mycotoxin production, and aerobic stability of whole-plant corn silage produced in farm-scale surface silos was evaluated. Two silos were prepared for each treatment (control and LF), opened after 14 days of storage, with a withdrawal rate of ~20 cm/day and sampled at 14, 21, 28, and 35 days. Inoculation reduced DM losses, increased acetic acid concentration and LAB population, and reduced ethanol concentration. Smaller yeast populations were observed in the inoculated silages in most of the evaluated periods. Control silages showed higher concentrations of deoxynivalenol (DON), whereas inoculation numerically reduced this mycotoxin at 14 and 35 days. The inoculated silages exhibited lower heating and a longer time to reach maximum temperature, indicating greater aerobic stability. It is concluded that inoculation with L. farraginis improves fermentative quality, reduces DM losses, increases aerobic stability, and contributes to reducing DON concentration in corn silages.
Foliar zinc supplementation as a mitigation strategy for reducing cadmium in cacao
(Universidade Federal de Lavras, 2025-12-29) García Porras, Gina Alexandra; Guilherme, Luiz Roberto Guimarães; Carvalho, Mariana Rocha de; Lopes, Guilherme; Morais, Everton Geraldo de
Cacao cultivation is an agricultural activity of great economic and social importance in tropical regions worldwide. However, in these regions, the presence of potentially toxic elements in the soil, such as cadmium (Cd), which bioaccumulate in different plant organs, has become a growing concern regarding the future of cacao exports in South America, particularly in Colombia, Ecuador, and Peru. It has been demonstrated that foliar zinc (Zn) application can inhibit Cd uptake in some crops by reducing its accumulation through the regulation of both root absorption and the transport of the metal from roots to shoots. In addition, Zn competes for the binding sites of protein transporters; thus, high Zn concentrations occupy these sites, preventing Cd transport to the phloem and favoring Zn translocation. With the aim of contributing to the solution of the cadmium bioaccumulation problem in cacao, this study sought to evaluate Cd bioavailability in the soil and in the plant through foliar Zn application as a mitigation strategy. To assess Cd inputs from phosphate sources and the effect of foliar Zn application, a completely randomized block design with a 4 × 3 factorial arrangement was used, in which the blocking factor corresponded to amendment application, and the interaction factors were the application of phosphate sources with contrasting Cd contents and the application of different foliar Zn doses. It was observed that juvenile cacao plants of the CCN 51 genotype exhibited root uptake and foliar accumulation of Cd, which increased in soils without amendment and with higher Cd concentrations in the soil. This response resulted in reduced photosynthesis and gas exchange, decreased chlorophyll content and PSII quantum efficiency, as well as alterations in the plant antioxidant enzymatic system. However, the application of a Zn dose of 8 g L⁻¹ increased leaf Zn concentration by up to sevenfold and reduced foliar Cd content by up to 26.9%, generating a positive effect reflected in the mitigation of adverse physiological effects and in the reduced likelihood of Cd accumulation in agronomically important organs, such as cacao fruits. These results indicate Zn as a practical and functional strategy for Cd mitigation in cacao cultivation in tropical and subtropical regions.
Experiência e memória na docência da Educação Infantil
(Universidade Federal de Lavras, 2025-05-21) Fraga, Kenia Rosa Ricardo; Betlinski, Carlos; Lobos, Dalva de Souza; Veloso, Braian Garrito; Silva, Luzia Batista de Oliveira; Lobo, Dalva de Souza
tccTeacher training implies constant investigation, and the quality of Early Childhood Education is strongly associated with this condition. In Antônio Nóvoa's theory, teaching only develops and constitutes itself professionally when faced with reflective and investigative processes of its practices, understanding them as unfinished processes. All formative processes occur through constructivism, from the inside out, within the school space and through collaboration with the peers involved. In Walter Benjamin's philosophy, teacher constitution is associated with the teacher's aesthetic experience, demystifying the unique technological and scientific imposition of knowledge acquired and practiced. This dissertation aimed to analyze, through the interpretation of images, the place of experience (aesthetics) and memory in the constitution of the teaching profession in Early Childhood Education. This objective achieved through exploratorydescriptive research using images from the voluntary participation of Early Childhood Education teachers, constituting data collected during a training course (which is also the educational product of the research). The results (products of narratives) organized into constructions of dialectical images (scenes) that culminated in the composition of a mosaic of the experience and memory of teaching, summarized in an artistic and aesthetic activity. These constituted alongside the artisan teaching of its stories and master of its narratives, as a technique for forming reinterpretations of singularities, organized and interpreted through historical events/objects. It concluded that the place of experience (aesthetics) and memory in the constitution of the teaching profession in Early Childhood Education, based on its artistic mosaic and the dialectical analysis of images. And history against the grain, allows us to affirm that the Early Childhood Education teacher constituted as a professional who learned to feel like a teacher, motivation or influences, from initial training to their practices and collaborative relationships with their peers in the school, as a space of continuous and complementary formative experience to university extension (to the diploma). Furthermore, this teacher shares experiences because they live and work within a community, strengthening themselves so that their challenges and uncertainties can be mitigated, while their aspirations can be strengthened and their social figure recognized and valued by society, based on their greatest asset – their experience.
Explorando o potencial das flores comestíveis de dália na indústria alimentícia: percepções, atitudes e barreiras para inovação
(Universidade Federal de Lavras, 2026-02-03) Silva, Anderson Antonio Neto da; Carneiro, João de Deus Souza; Resende, Luciane Vilela; Rodrigues, Jéssica Ferreira; Fontan, Gabrielle Cardoso Reis; Valente, Gerson de Freitas Silva
This study evaluated the potential of edible flowers from Dahlia spp. as a food ingredient by examining perceptions, attitudes, and psychosocial barriers to innovation. The central issue addressed was the underutilization of dahlia in food applications, despite its sensory and nutritional value. The research adopted a mixed-methods approach organized into two complementary stages. In Article 1, the objective was to examine how different types of information influence consumer acceptance of dahlia as a food ingredient, considering perceptions of safety, healthfulness, sensory appeal, and sustainability. The descriptive study involved 245 Brazilian consumers and applied the Text Highlighting Technique combined with Likert scales administered before and after exposure to an informative text. The findings showed that structured, evidence-based messages significantly reduced perceived risk and fear of allergies, increasing consumer interest and trust in dahlia flowers. Moreover, the analysis identified distinct consumer profiles with specific patterns of evaluation and response to the information provided. Explorers valued innovation and aesthetics; Achievers were more receptive to narratives related to health and sustainability; and Guardians maintained a more cautious stance, underscoring the importance of accessible, institutional communication to foster trust. In Article 2, the aim was to understand how product category and the emphasis on dahlia as an Unconventional Food Plant (UFP) influence attitudes, safety perceptions, and purchase intention. A mixed-methods design was implemented, combining free word association and conjoint analysis with 400 participants who evaluated four product categories (yogurt, tea, non-alcoholic beverage, and minimally processed flowers), with and without emphasis on the “unconventional” attribute. The results indicated that familiarity and product category are key determinants of acceptance. Dahlia tea was associated with naturalness and healthfulness, whereas non-alcoholic beverages triggered doubts regarding authenticity. Exclusive emphasis on the UFP attribute increased perceptions of sustainability but decreased purchase intention, revealing the symbolic and cultural dimensions influencing acceptance. Taken together, the findings from both studies indicate that acceptance of dahlia is shaped by cognitive, symbolic, and informational factors. The main barriers identified were consumer unfamiliarity, food neophobia, and perceived risk, while the main facilitators included the flower’s aesthetics, its association with naturalness and sustainability, and increased trust derived from clear and evidence-based information. It is concluded that Dahlia spp. flowers present strong potential for innovation in the food industry, provided they are accompanied by communication and positioning strategies tailored to consumer profiles. The findings offer practical implications for new product development, the valorization of UFP species, agricultural diversification, and the promotion of a diversified diet aligned with contemporary consumer demands.
Indústrias criativas e culturais em perspectiva: desenvolvimento sustentável, fluxos de ide e distribuição territorial
(Universidade Federal de Lavras, 2025-10-29) Oliveira, Izadora Ribeiro e Garcia de; Calegario, Cristina Lelis Leal; Alcantara, Juciara Nunes de; Ávila, Ednilson Sebastião de; Floriani, Dinorá Eliete; Pinto, Cláudia Sofia Frias
Cultural and Creative Industries (CCI) have gained global prominence for combining culture, innovation, and sustainability, establishing themselves as a strategic driver of economic and social development. Simultaneously, multinational enterprises (MNEs), through Foreign Direct Investment (FDI), play an ambiguous role in sustainable development, potentially generating both positive and negative externalities. Based on International Business and Legitimacy Theories, this thesis investigates how the CCI relates to sustainable development in Latin America and Brazil, considering its links with FDI and its territorial distribution. Specifically, it sought to: (1) systematize and critically analyze the scientific production on the interface between CCI and sustainability; (2) examine the moderating role of the CCI in the relationship between FDI and sustainable development in Latin American countries; and (3) map and analyze the spatial distribution of the CCI in Brazil, identifying regions and cities with the highest concentration of these activities and their evolution over time. To achieve these objectives, the thesis was structured in three articles. The first, of a qualitative nature, conducted a systematic literature review on creative innovation and sustainability, highlighting creativity as a mediating element of innovation and social inclusion. The second article adopted a quantitative approach, applying panel data models to 13 Latin American countries from 2011 to 2021. The results demonstrated that FDI, in isolation, has a negative effect on sustainability indices, but that the presence of creative innovation positively moderates this relationship, mitigating adverse impacts and strengthening legitimate corporate practices. It was also observed that higher levels of sustainability increase the attraction of FDI, confirming a bidirectional relationship, while variables such as creative exports, exchange rate, and population growth showed a positive association with investment flows. The third article mapped the Creative Economy in Brazil based on RAIS data (2014–2023), revealing significant growth in creative employment and a dual territorial dynamic: absolute concentration in large metropolitan areas and relative specialization in smaller municipalities, especially in the North and Northeast regions. The results indicate that FDI, in isolation, does not promote sustainable development, but its interaction with local creative ecosystems favors more legitimate and lasting business practices. The Creative Economy thus emerges as an institutional mediator capable of converting economic capital into social and cultural value, reinforcing territorial cohesion and sustainability. From a theoretical point of view, the thesis contributes by integrating the perspectives of international business, legitimacy, and the creative economy, proposing an explanatory model on the institutionalization of sustainability in contexts of regulatory fragility. In practical terms, the findings reinforce the need for public policies aimed at creative decentralization, strengthening regional cultural ecosystems, and incorporating cultural criteria into governance instruments and attracting FDI. In summary, the research shows that creativity and culture constitute essential institutional architectures for balancing economic growth and social sustainability in Latin America and Brazil.