Avaliação da produtividade de mandioca em função de diferentes doses de fósforo Evaluation of cassava productivity due to different doses of phosphorus
Essa pesquisa tem como objetivo apresentar um panorama das publicações científicas sobre as ferramentas de Gestão Ambiental (GA): Produção mais limpa (P+L); Ecodesign; Pegada de carbono; Pegada hídrica e Rotulagem Ambiental, entre janeiro de 2017 e julho de 2022, no Brasil. Tal seleção se deu em virtude da respectiva relação direta da ferramenta com a possibilidade de redução dos impactos ambientais negativos. Com base em revisão bibliográfica foram mapeados: artigos científicos; trabalhos de conclusão de curso; dissertações de mestrado; teses de doutorado e capítulos de livro. Também se buscou informações sobre a aplicação das referidas ferramentas no setor público e no setor privado, assim como também em determinados ramos de atuação da organização. Concluise que, 21 publicações continham pelo menos uma das ferramentas pesquisadas, e que, no ano de 2018 foram publicados 7 (sete) trabalhos, maior número no intervalo temporal pesquisado, e no ano de 2020, apenas um trabalho.Palavras-chave: Produção mais limpa; Ecodesign; Pegada de carbono; Rotulagem Ambiental. INTRODUÇÃOA revolução industrial e a globalização ocasionaram um aumento nos problemas ambientais em âmbito mundial. Bilar et al. (2019) salientam que as empresas, com suas operações, merecem destaque dentre as atividades com impactos negativos ao meio ambiente. Diante disso, evidencia-se
Considering the current conditions of fuel, the objective of this study was to evaluate the energy balance and Carbon Footprint of biodiesel from jatropha oil, considering the dynamism of the production chain. For this, after the creation of the dynamic outline, based on the linear idea, the system is divided into subsystems and the data were analyzed by means of Ecoinvent and PAS databases. Then, the activities of each subsystem were listed and had relevant information to obtain the search results. The results reinforce the potential of Jatropha biodiesel, illustrated by low emission compared to soy and castor bean biodiesel. As for the energy balance, Jatropha has a favorable relationship with respect to castor and rapeseed, with disadvantage compared to soybeans. Thus, the jatropha has shown interesting results compared with some alternative, and as it is an inevitable replacement, given the decline in oil supply, this oilseed prove increasingly promising.
APLICAÇÃO DE BIOSSOLIDO COMO FERTILIZANTE PARA PRODUÇÃO DE PINHÃO-MANSO (Jatropha curcas L.) EM LATOSSOLO VERMELHO EUTRÓFICO: ASPECTOS AGRONÔMICOS E FINANCEIROSO pinhão-manso (Jatropha curcas L.), cultura de ciclo perene, adapta-se a diferentes variações de solo e clima. Seu cultivo tem sido incentivado como matéria prima para produção de biodiesel, podendo apresentar rendimento de até 60% de óleo. Neste contexto, este trabalho teve como objetivo analisar se o lodo de esgoto pode contribuir para a redução dos gastos na cultura do pinhão-manso, atuando como biofertilizante, concedido gratuitamente pelas estações de tratamento de esgotos. O experimento foi conduzido com cinco tratamentos e três repetições, em Latossolo Vermelho eutrófico. Em termos agronômicos o biossólido analisado mostrou-se adequado para o uso agrícola, e sua eficiência agronômica foi 25,6% maior que o NPK, quando aplicado na razão de 60 kg de N/ha. Contudo, em valores absolutos, as produções de frutos obtidas nas parcelas adubadas com biossólidos e fertilizante solúvel, na razão de 40 kg de N/ha cada, não foram observadas diferenças significativas. Os resultados mostram também viabilidade financeira, pois o produtor rural deixaria de gastar com a compra do fertilizante industrializado, e viabilidade ambiental, tendo em vista a destinação útil de um resíduo do processo de tratamento de água de esgoto, o lodo de esgoto.Palavras-chave: Lodo de esgoto, biofertilizante, vantagens ambientais, sustentabilidade.Application of biossolids as a fertilizer for pinhão-manso Jatropha curcas L. production in Eutrophic Red Latosol: agronomic and financial aspects. The pinhão-manso (Jatropha curcas L.), culture of perennial cycle, adapts to different soil and climate variations. Its cultivation has been motivated as primary matter for the biodiesel production and can present revenue of up to 60% of oil. In this context, this work had as objective analyzes if the sewer mud could contribute in the expenses reduction of the culture of the pinhão-manso, acting as biofertilizer, granted gratuitously by the sewer treatment stations. The experiment was conducted with five treatments and three repetitions, in Red Eutrophic Latosoil. In agronomic terms the analyzed mud was shown appropriate for the agricultural use presenting an agronomic efficiency of 25,6% greater than the NPK, when applied in the reason of 60 kg of N/ha. However, in absolute values, the fruit productions obtained in the parcels fertilized with mud and soluble fertilizer, in the reason of 40 kg of N/ha each, significant differences were not observed. The results also show financial viability, because the rural producer would stop spending with the purchase of the industrialized fertilizers and environmental viability, considering the useful destination of a residue of the sewer treatment process, the sewer mud.
Tomato quality is directly related to the quality of the water used for irrigation and the adequate supply of nutrients, which can lead to damage due to soil salinization, with a consequent reduction in crop yield. This work aims to evaluate the emergence and initial development of 'Bartô' tomato seeds when submitted to different levels of saline water. Tomato cultivar seeds (Solanum lycopersicum) were subjected to five concentrations of sodium chloride (NaCl), 2.5; 3.5; 4.5; 6.5 and 7.5 dS m-1. The design used was completely randomized (DIC) with four replications of 25 seeds per modality. Sowing was carried out in petri dishes, on a paper towel disc. The papers were moistened with the saline solution in their respective concentrations. Then the plates were sealed to prevent moisture loss. The assays were kept in the BOD (biology oxygen demand), at a temperature of 25ºC. In addition to the electrical conductivity test, the physiological characterization of tomato seeds was carried out, such as: first germination assembly, emergence speed index (IVE); germination percentage; seedling length. The data were submitted to analysis of variance using the SISVAR Software, and were not transformed, as they followed a normal and homogeneous distribution. The maximum salinity in irrigation water that tomato plants can withstand without affecting productivity was 1.7 dS m-1. The salinity level that negatively affected the studied variables was from 4.5 dSm-¹.
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