Economic viability of juveniles tilapia and arugula production integrated in aquaponics in system NFT RAFAELLA M.S. DE MEDEIROS, ADRIANO C. COSTA, LELIS PEDRO DE ANDRADE, ISABEL R. REZENDE, ALENE S. SOUZA, et al. Anais Da Academia Brasileira De Ciencias, 2026 This study aimed to evaluate the economic feasibility of implementing an aquaponic system using different stocking densities of tilapia juveniles integrated with arugula production in a Nutrient Film Technique (NFT) system. To gather data for the economic analysis, an experiment was conducted using a completely randomized 3 x 2 factorial design (densities: 20, 40, and 60 fish/m³; filter media volumes: 50 and 70 liters of expanded clay), with three replications. Each experimental unit consisted of an NFT aquaponic module. The economic analysis included calculations of net present value, internal rate of return, profitability index, and payback period. Results showed that fish stocking density significantly affects the economic viability of an aquaponic system integrating tilapia juveniles and arugula production. The price of arugula increased with higher fish stocking densities, while the price of fish remained unaffected. Stocking densities of 40 and 60 fish/m³ were found to be economically feasible, exhibiting similar internal rates of return, both higher than those observed at a density of 20 fish/m³, which was not economically viable.
Effect of Organic and Mineral Phosphate Fertilization of the Plant Cane and First Ratoon on Agronomic Performance and Industrial Quality of the Second Ratoon in the Brazilian Cerrado Region Evaldo Alves dos Santos, Frederico Antonio Loureiro Soares, Marconi Batista Teixeira, Edson Cabral da Silva, Antônio Evami Cavalcante Sousa, et al. Agronomy, 2025 Sugarcane requires high doses of phosphorus to achieve high productivity. However, not all the phosphorus applied to crops is utilized. Therefore, it is believed that some remaining phosphorus can meet the nutrient demand of the ratoon crop. The objective of this study was to evaluate the effects of mineral fertilization with triple superphosphate (TSP) and organic fertilization with poultry litter (PL), applied to plant cane and the first ratoon, on the quality of second ratoon sugarcane. The experimental design was a randomized complete block design with a 5 × 5 factorial scheme with four replications. The treatments consisted of five TSP doses (0, 60, 120, 180, and 240 kg ha−1) and five PL doses (0, 2, 4, 6, and 8 t ha−1). Fertilization with TSP and PL applied in the two preceding cycles promoted an increase in plant height, stalk diameter, number of tillers, and productivity in the second ratoon. The doses of triple superphosphate and chicken litter applied in cycles preceding the second ratoon were able to increase the agronomic performance of the genotype IACSP95-5094. However, the highest subsequent combined doses of triple superphosphate and chicken litter resulted in a 27% increase in stalk productivity. In general, the preceding doses of chicken litter showed greater potential to enhance the technological attributes.
Agronomic performance and technological quality of sugarcane submitted to different poultry litter dosages Willian Marques Pires, Marconi Batista Teixeira, Frederico Antônio Loureiro Soares, Wilker Alves Morais, Adriano Carvalho Costa, et al. Scientific Reports, 2024 Sugarcane is a central crop for sugar and ethanol production. Investing in sustainable practices can enhance productivity, technological quality, mitigate impacts, and contribute to a cleaner energy future. Among the factors that help increase the productivity of sugarcane, the physical, chemical and biological parameters of the soil are amongst the most important. The use of poultry litter has been an important alternative for soil improvement, as it acts as a soil conditioner. Therefore, this work aimed to verify the best doses of poultry litter for the vegetative, reproductive and technological components of sugarcane. The experiment was carried out at Usina Denusa Destilaria Nova União S/A in the municipality of Jandaia, GO. The experimental design used was a complete randomized block design with four replications: 5 × 4, totaling 20 experimental units. The evaluated factor consisted of four doses of poultry litter plus the control (0 (control), 2, 4, 6 and 8 t ha−1). In this study, were evaluated the number of tillers, lower stem diameter, average stem diameter, upper stem diameter, plant height, stem weight and productivity. The technological variables of total recoverable sugar, recoverable sugar, Brix, fiber, purity and percentage of oligosaccharides were also evaluated. It was observed, within the conditions of this experiment, that the insertion of poultry litter did not interfere significantly in most biometric, productive and technological variables of the sugarcane. But it can also be inferred that there was a statistical trend toward better results when the sugarcane was cultivated with 4 t ha-1 of poultry litter.
Agronomic Performance and Technological Attributes of Sugarcane Cultivars Under Split-Irrigation Management Henrique Fonseca Elias de Oliveira, Fernando Henrique Arriel, Frederico Antônio Loureiro Soares, Edson Cabral da Silva, Marcio Mesquita, et al. Agriengineering, 2024 In addition to being an important instrument in the search for increasingly greater productivity, agricultural production with adequate use of irrigation systems significantly minimizes the impact on water resources. To meet high productivity and yield, as well as industrial quality, a series of studies on sugarcane cultivation are necessary. Despite being able to adapt to drought, sugarcane is still a crop highly dependent on irrigation to guarantee the best quality standards. Our study aimed to analyze the agronomic performance and technological attributes of two sugarcane cultivars, evaluating the vegetative and productive pattern, as well as the industrial quality of the cultivars RB92579 and SP80–1816, which were cultivated under split-irrigation management in the Sugarcane Research Unit of IF Goiano—Campus Ceres, located in the state of Goiás in the Central-West region of Brazil. A self-propelled sprinkler irrigation system (IrrigaBrasil) was used, duly equipped with Twin 120 Komet sprinklers (Fremon, USA). The cultivars were propagated vegetatively and planted in 0.25 m deep furrows with 1.5 m between rows. The experiment was conducted in a completely randomized design (CRD), with a bifactorial split-plot scheme (5 × 2), with four replications, where the experimental plots were subjected to one of the following five split-irrigation management systems: 00 mm + 00 mm; 20 mm + 40 mm; 30 mm + 30 mm; 40 mm + 20 mm; or 60 mm + 00 mm. At 60 and 150 days after planting (DAP), the following respective irrigation management systems were applied: 00 mm + 00 mm and 20 mm + 40 mm. Biometric and technological attributes, such as plant height (PH) and stem diameter (SD), were evaluated in this case at 30-day intervals, starting at 180 DAP and ending at 420 DAP. Measurements of soluble solids content (°Brix), apparent sucrose content (POL), fiber content (Fiber), juice purity (PZA), broth POL (BP), reducing sugars (RS), and total recoverable sugars (TRS) were made by sampling stems at harvest at 420 DAP. RB92579 showed total recoverable sugar contents 11.89% and 8.86% higher than those recorded for SP80–1816 under split-irrigation with 40 mm + 20 mm and 60 mm + 00 mm, respectively. Shoot productivity of RB92579 reached 187.15 t ha−1 under split-irrigation with 60 mm + 00 mm, which was 42.16% higher than the shoot productivity observed for SP80–1816. Both cultivars showed higher qualitative and quantitative indices in treatments that applied higher volumes of water in the initial phase of the culture, coinciding with the dry season. Sugarcane cultivar RB92579 showed a better adaptation to the prevailing conditions in the study than the SP80–1816 cultivar.
Biostimulant potential in mitigation of damage from herbicides applied in post-emergency in soybean crops Christiano Lima Lobo de Andrade, Alessandro Guerra da Silva, Alan Carlos da Costa, Marconi Batista Teixeira, Adinan Alves da Silva, et al. Semina Ciencias Agrarias, 2024 Uma alternativa para minimizar os efeitos da indução de resistência aos herbicidas é a rotação de ingredientes ativos. Entre os herbicidas amplamente utilizados, destacam-se os inibidores das enzimas acetolactato sintase (ALS) e da protoporfirinogênio oxidase (PROTOX). No entanto, a utilização destes pode causar uma série de danos ao metabolismo fotossintético da soja e comprometer o desenvolvimento da cultura, tendo como alternativa para mitigar os efeitos a aplicação de bioestimulante derivado da alga Ascophyllum nodsosum. Portanto, objetivou-se com o presente estudo verificar o potencial de um bioestimulante derivado de A. nodosum em mitigar danos ao processo fotossintético de plantas de soja tratadas com herbicidas em casa de vegetação e pós-emergência. Para isto, foi instalado um experimento em casa de vegetação com nove tratamentos, em arranjo fatorial com 3 aplicações de herbicidas (sem herbicida; Cloransulan; Lactofen) X 3 aplicações de biostimulante (sem aplicação; 3 dias após a aplicação dos herbicidas (DAA); 6 DAA). Foram realizadas avaliações de trocas gasosas, índices de clorofilas e fluorescência da clorofila a. Por meio dos resultados obtidos foi possível concluir que aos 2 dias após a aplicação dos bioestimulantes, os herbicidas não proporcionaram inibição das trocas gasosas das plantas de soja. Por outro lado, aos 10 DAA dos herbicidas foi possível constatar que o cloransulam e lactofen alterou os parâmetros da fluorescência da clorofila a, porém não foi constatado efeito protetor do bioestimulante. Embora não tenha efeito isolado do bioestimulante nos parâmetros da fluorescência, sua aplicação aos 3 DAA dos herbicidas proporcionou incrementos na taxa fotossintética, condutância estomática e na eficiência da carboxilação das plantas de soja. É possível concluir que o bioestimulante tem potencial de uso na cultura da soja com o propósito de mitigar os efeitos da aplicação de herbicidas seletivos.
Phytochemical constituents and antifungal and antibacterial activities of Zanthoxylum riedelianum Engl trunk bark extract Revista Cubana De Farmacia, 2022
Antioxidant activity of essential oils from Cochlospermum regium (Bixaceae) Revista Cubana De Plantas Medicinales, 2021
Cation concentrations and dynamics in the surface profile of two oxisols after the application of vinasse Romanian Agricultural Research, 2021
Phytochemical study and in vitro biological activities of Chlorella vulgaris, Chlorella pyrenoidosa and Chlorella minutissima extracts Avances En Quimica, 2021
Oil content in physic nut in function of wastewater levels Antonio Evami Cavalcante Sousa, Hans Raj Gheyi, Frederico Antonio Loureiro Soares, Everaldo Paulo de Medeiros, Elka Costa Santos Nascimento Pesquisa Agropecuaria Brasileira, 2011
