https://repositorio.ifgoiano.edu.br/handle/prefix/227 2026-07-21T14:27:41Z 2026-07-21T14:27:41Z Pimentel, Felipe Leiber Coelho https://repositorio.ifgoiano.edu.br/handle/prefix/6752 2026-06-30T20:36:26Z 2026-06-10T00:00:00Z

Título: CURVA DE INCUBAÇÃO DO PÓ DE ROCHA CARBONATITO FOSFÁTICO COMO REMINERALIZADOR DE SOLO Autor(es): Pimentel, Felipe Leiber Coelho Primeiro Orientador: Valicheski, Romano Roberto Primeiro Membro da Banca: Oliveira, Silvia Sanielle Costa de Segundo Membro da Banca: Alves, Estenio Moreira Abstract: The high dependence on soluble mineral fertilizers in Brazilian agriculture has encouraged the search for alternative inputs capable of promoting soil fertility in a more sustainable manner, among it the soil remineralizers stand out. This study aimed to evaluate the incubation curve of phosphate carbonatite and its effects on the chemical attributes of a Dystrophic Red Latosol. The experiment was carried out under greenhouse conditions using a randomized block design with four replications and rates of 0, 1, 3, and 5 t ha⁻¹ of the remineralizer. Soil samples were collected every 30 days during an incubation period of up to 120 days. Throughout the evaluation period, a gradual increase in soil pH and a reduction in potential acidity were observed, especially at the highest application rates, reflecting the progressive dissolution of carbonate minerals. The phosphate carbonatite application promoted a continuous increase in soil phosphorus contents during incubation, indicating the progressive release of apatites present in the material. Changes were also observed in cation exchange capacity, base saturation, and the dynamics of micronutrients (Cu, Fe, Mn, and Zn), mainly associated with changes in soil pH. Overall, the results indicate that phosphate carbonatite acts as a gradual release remineralizer with potential to be integrated into sustainable soil fertility management strategies, particularly in highly weathered tropical environments. Editor: Instituto Federal Goiano Tipo: Dissertação

2026-06-10T00:00:00Z Lemes, Breno Caires Candido Pereira https://repositorio.ifgoiano.edu.br/handle/prefix/6650 2026-06-10T11:43:11Z 2026-04-15T00:00:00Z

Título: PARÂMETROS NUTRICIONAIS DA CANA-DE-AÇÚCAR CULTIVADA COM CARBONATITO FOSFÁTICO E MICRORGANISMOS BIOSSOLUBILIZADORES DE FÓSFORO Autor(es): Lemes, Breno Caires Candido Pereira Primeiro Orientador: Valicheski, Romano Roberto Abstract: Brazil's dependence on imported fertilizers and the low availability of phosphorus in tropi-cal soils intensify the search for sustainable alternatives for crop nutrition. The objective was to evaluate the nutritional status of sugarcane subjected to different phosphorus sources associated with biosolubilizing microorganisms. The experiment was carried out in a green-house, in a randomized block design with four replications. Three phosphorus sources were evaluated (phosphate carbonatite rock powder, single superphosphate, and a combination of both) associated with inoculation/co-inoculation of Bacillus spp., Cladosporium cladospori-oides, and Trichoderma harzianum. Ninety-five days after planting, foliar macro- and mi-cronutrient levels were determined. The results showed that the use of the remineralizer provided phosphorus levels like soluble fertilizer, in addition to contributing to potassium supply. The combination of sources favored an increase in zinc. Regarding microorganisms, Trichoderma harzianum stood out by promoting increases in phosphorus, sulfur, and micro-nutrients, regardless of the source used, while Bacillus spp. and Cladosporium cladospori-oides showed greater efficiency when associated with poorly soluble sources. It is concluded that the use of remineralizers associated with biosolubilizing microorganisms constitutes a promising strategy to increase the nutritional efficiency of sugarcane, reduce dependence on imported fertilizers, and promote sustainable production systems. Editor: Instituto Federal Goiano Tipo: Dissertação

2026-04-15T00:00:00Z Santos, Indiane Mirelle Ferreira https://repositorio.ifgoiano.edu.br/handle/prefix/6628 2026-05-29T17:20:11Z 2026-04-01T00:00:00Z

Título: SUPLEMENTAÇÃO FOLIAR COM AMINOÁCIDOS: IMPACTOS NO METABOLISMO DA CLOROFILA E NA PRODUTIVIDADE DO ALGODÃO HERBÁCEO Autor(es): Santos, Indiane Mirelle Ferreira Abstract: Herbaceous cotton is a crop of considerable economic and historical importance, widely cultivated in over 70 countries and responsible for generating billions of dollars in international trade. In Brazil, cotton productivity has increased due to the adoption of more efficient cultivars and improved management practices; however, low-fertility soils, such as those prevalent in the Cerrado region, remain a significant constraint. In this context, foliar fertilization, particularly when associated with amino acids, has emerged as a promising strategy, as it enhances nutrient uptake, improves stress tolerance, and promotes plant productivity. Therefore, this study aimed to evaluate the effects of foliar application of an amino acid-based biostimulant on the physiological and yield-related characteristics of cotton plants. The experiment was conducted using a randomized complete block design, with six treatments and four replications. Treatments consisted of six doses of an amino acid-based biostimulant (0, 200, 400, 600, 800, and 1000 mL ha⁻¹), applied via foliar spraying at the flowering phenological stage (R1). The cotton cultivar used was FM 975 WS. The evaluated variables included SPAD index, dry matter accumulation, number of bolls per plant, and yield. Overall, the application of biostimulants showed potential to enhance both physiological performance and yield of cotton plants when applied at appropriate rates. It can be concluded that foliar application of the biostimulant improves cotton performance, with recommended application rates ranging from 600 to 800 mL ha⁻¹. Editor: Instituto Federal Goiano Tipo: Artigo de Periódico

2026-04-01T00:00:00Z Cruz, Railane Silva da https://repositorio.ifgoiano.edu.br/handle/prefix/6613 2026-05-27T19:25:55Z 2026-03-30T00:00:00Z

Título: AJUSTES METODOLÓGICOS DO TESTE DE HIPOCLORITO DE SÓDIO EM SEMENTES DE SOJ Autor(es): Cruz, Railane Silva da Primeiro Orientador: Oliveira, Silvia Sanielle Costa de Abstract: Mechanical damage is a major obstacle to the production of high-quality soybean seeds. The most critical stage in the entire production process is harvesting and processing, where there is the greatest risk of such damage occurring. The objective of this work was to develop a quick and practical methodology for evaluating mechanical damage in soybean seeds. The work was carried out in a factorial design with two 5x6 factors using different concentrations of sodium hypochlorite (4.75, 5.0, 5.25, 5.50 and 5.75%) and soaking times (3, 4, 5, 6, 7 and 10 min). The solutions were prepared from commercial 9% sodium hypochlorite, performing the necessary dilutions using the dilution equation C1V1 = C2V2. This treatment was applied to three soybean cultivars: Olimpo 80I82RSF IPRO, M7601 I2X, and Bônus 8579RSF IPRO, one batch of each, from 2023/2024 growing season, with four replicates of 100 seeds per treatment. For mechanical damage tests, a seed counter and the necessary sodium hypochlorite were used to prepare 1.0 liters of stock solution. The results indicated that, for soybean cultivars Bônus 8579 RSF IPRO and M7601 I2X, among the concentrations evaluated in this study, the 5.75% sodium hypochlorite solution associated with a treatment time of 3 minutes presented the lowest values of mechanical damage. For Olimpo 80I82 RSF IPRO cultivar, it was observed that a 5.75% sodium hypochlorite concentration combined with a 10-minute exposure time resulted in a lower rate of mechanical damage. However, the literature and technical recommendations from Embrapa indicate the use of a 5.25% solution, emphasizing that further research comparing different concentrations in different batches is necessary to validate possible methodological adjustments, since these conditions do not compromise the reliability of the results and allow for greater speed in the evaluation process. KEYWORDS: Stamina test; Soaking; Mechanical damage; Glycine max. (L) Editor: Instituto Federal Goiano Tipo: Dissertação

2026-03-30T00:00:00Z