https://repositorio.ufu.br/handle/123456789/18053 Sun, 04 Oct 2026 15:12:53 GMT 2026-10-04T15:12:53Z https://repositorio.ufu.br/handle/123456789/50468 Title: Aplicação de S-metolachlor com fertilizante organomineral em sorgo Abstract: Sorghum (Sorghum bicolor (L.) Moench) is a crop of great economic importance, standing out for its high tolerance to water deficit and wide adaptation to different edaphoclimatic conditions. For proper crop establishment, nutritional management and weed control are essential, and the application of fertilizers and herbicides at similar stages of cultivation is common. In this context, the joint application of organomineral fertilizer with the herbicide S-metolachlor emerges as a possibility to optimize machinery use, energy, and labor. Therefore, this study aimed to evaluate the selectivity of the herbicide S-metolachlor to sorghum and its efficiency in weed control when applied jointly with pelleted and granular organomineral fertilizer. The experiment was conducted in a randomized block design with five treatments and four replications. Smetolachlor was applied at planting in three application methods: previously mixed with pelleted organomineral fertilizer, mixed with granular organomineral fertilizer, and applied using a backpack sprayer for experimental purposes. Two control treatments were also included: one under weed interference and another under weekly mechanical weed control. Injuries to sorghum plants and weed control were evaluated at 10, 17, 24 and 31 days after application. At the end of the crop cycle, sorghum yield was assessed and weed biomass was determined. It was observed that S-metolachlor did not cause injuries to sorghum plants, regardless of the application method. Regarding weed control, the herbicide applied with a backpack sprayer showed greater efficacy compared to the application of the herbicide-fertilizer mixture. Yield and weed biomass showed consistent results when compared with each other. In conclusion, the joint application of Smetolachlor with organ mineral fertilizer is a viable alternative from an operational standpoint; however, it may present limitations in weed control efficiency when compared to conventional application. Thu, 28 May 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50468 2026-05-28T00:00:00Z https://repositorio.ufu.br/handle/123456789/50388 Title: Uso de organofosfato em associação com MAP na cultura da Urochloa brizantha cv. Marandu Fri, 31 Jul 2026 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50388 2026-07-31T00:00:00Z https://repositorio.ufu.br/handle/123456789/50260 Title: Implicações da adição de fontes de fósforo sob indicadores microbianos e bioquímicos do solo Abstract: Phosphorus is a vital nutrient for terrestrial organism due to its importance in cellular metabolism. Highly weathered soils have low availability of P in the soil solution due to the adsorption of phosphate in the soil matrix, such as iron and aluminum oxides. The soil microbiota is preponderant in the availability of P in the soil solution due to the dynamics of immobilization and mineralization and rapid cycling. The objective of this work was to evaluate the impact of the addition of different P sources on soil microbial and biochemical indicators (Soil microbial respiration (SMR); Microbial Biomass Carbon (MBC); Soil Metabolic Quotient (qCO₂); FDA; acid phosphatase activity). The work was carried out on a sample of a Oxisoil, collected in Uberlândia, MG. The experiment was installed in a glass flask (600 mL) with 100 g of soil and 300 mg of P kg⁻¹ of soil was added. The treated with four replications were assembled to evaluate the source of P: 1- control, 2- potassium monophosphate (KHPO₄), 3- simple superphosphate, 4- phosphate rock dust, 5- phytic acid, 6- inositol. The results show that phytic acid had a significant increase compared to the other sources, with a lower SMR value being observed in the treatment with KHPO₄ of the phosphate sources. The addition of P, regardless of the source, tends to decrease MBC in the soil compared to the control treatment, leading to an increase in qCO₂ in the treatments with P addition. The addition of P sources significantly affects the FDA activity, with the highest values found in the treatment with the addition of KHPO₄. A lower FDA activity was not found in the phytic acid treatment. Treatments with P did not affect the phosphatase activity in the soil when compared to the control treatment. Concluded that the addition of phosphorus sources differentially alters soil metabolism, but this alteration may be specific to a soil bioindicator. Fri, 17 Feb 2023 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50260 2023-02-17T00:00:00Z https://repositorio.ufu.br/handle/123456789/50111 Title: Germinação e desenvolvimento inicial de Banisteriopsis malifolia (Ness & Mart.) B. Gates (Malpighiaceae) condicionado pelo peso das sementes Abstract: The reproductive success of plants depends on several factors, including the presence of pollinators in cultivation areas, which can be increased by the presence of surrounding plants that regularly offer food resources to sustain populations of bees and other floral visitors capable of transporting pollen between flowers of the same species. For this, it is necessary to know relevant aspects for the production of seedlings of native and rustic species, such as the morphological characteristics of the fruits. Our objective was to investigate whether the weight of the fruits influences the germination and initial development of seedlings of Banisteriopsis malifolia (Nees & Mart.) B. Gates (Malpighiaceae), a rustic and native species of the Cerrado, recognized for providing pollen and floral oil to bees. Mature fruits were collected from 23 distinct plants and classified into four weight groups: very light (10–39.9 mg), light (40–59.9 mg), medium (60–79.9 mg), and heavy (80–110 mg). A total of 174 fruits were sown and monitored for 275 days. The results indicated that only medium and heavy fruits were able to germinate (16% and 29.16%, respectively). The development of seedlings was similar between the medium and heavy groups, with no significant differences in height, stem diameter, and number of leaves. The decrease in the number of leaves over time suggests a physiological adjustment to the availability of water resources. Our results indicate that the selection of heavier and medium fruits of B. malifolia can optimize seedling production. The low germination rate may indicate the presence of dormancy influenced by environmental factors, or that the seeds are recalcitrant and must be planted quickly after harvest to maintain viability, which deserves further studies. Keywords: Seedling production, fruit weight, Cerrado, seedling development, dormancy. Fri, 19 Sep 2025 00:00:00 GMT https://repositorio.ufu.br/handle/123456789/50111 2025-09-19T00:00:00Z