1,137 research outputs found

    Cultivo de gladíolo em sistema de plantio direto orgânico

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    Cut flowers are considered an important alternative for property diversification, especially in family farming. The culture of gladiolus (Gladiolus x grandiflorus Hort.) is easy to conduct and has good added value. The traditional way of cultivating gladiolus is carried out with intense soil revolution, which can generate losses in the system. Thus, the adoption of sustainable systems becomes important for the balance of agroecosystems, with the No-Till System being one of these options. The objective of this work is to evaluate the agronomic performance of gladiolus in the organic no-tillage system. The experiment was carried out in the Horticulture sector of the Federal University of Fronteira Sul, Laranjeiras do Sul-PR campus. The experiment was carried out in completely randomized blocks with plots containing a mix of ground cover plants composed of black oat (Avena strigosa Schreb) + Vetch (Vicia sativa L.) + forage turnip (Raphanus sativus L.) and cultivation without cover, followed by cultivation of gladiolus. The gladiolus cultivar used was Yester intermediate cycle II. The evaluations carried out were: phenological and morphological characteristics of the crop, physical and biological characteristics of the soil, incidence of phytophagous insects, diseases and weeds, post-harvest viability and productivity. The results of basal soil respiration, soil temperature, weed incidence, total chlorophyll, rod length, largest leaf length, classification of floral stems classification and productivity showed significant differences between the systems. Cultivation with ground cover obtained higher productivity, with an average of 79,666 stems per hectare. The no-tillage system with organic management showed satisfactory agronomic results, being indicated for the cultivation of gladioli.As flores de corte são consideradas uma importante alternativa para diversificação da propriedade, principalmente na agricultura familiar. A cultura do gladíolo (Gladiolus x grandiflorus Hort.) possui fácil condução e tem bom valor agregado. A forma tradicional de cultivar o gladíolo é realizada com intenso revolvimento do solo, o que pode gerar perdas no sistema. Assim, a adoção de sistemas sustentáveis torna-se importante para o equilíbrio dos agroecossistemas, sendo o Sistema de Plantio Direto uma destas opções. O objetivo nesse trabalho é avaliar o desempenho agronômico de gladíolo em sistema de plantio direto orgânico. O experimento foi realizado no setor de Horticultura da Universidade Federal da Fronteira Sul, campus Laranjeiras do Sul-PR. O experimento foi conduzido em blocos completamente casualizados com parcelas contendo mix de plantas de cobertura de solo composto por aveia preta (Avena strigosa Schreb) + ervilhaca (Vicia sativa L.) + nabo forrageiro (Raphanus sativus L.) e cultivo sem cobertura, seguido do cultivo do gladíolo. A cultivar de gladíolo utilizada foi Yester ciclo intermediário II. As avaliações realizadas foram: características fenológicas e morfológicas da cultura, características físicas e biológicas do solo, incidência de insetos fitófagos, doenças e plantas espontâneas, qualidade das hastes florais e produtividade. Os resultados de respiração basal do solo, temperatura do solo, incidência de plantas espontâneas, clorofila total, comprimento da haste, comprimento da maior folha, classificação das hastes florais e produtividade apresentaram diferenças significativas entre os sistemas. O cultivo com cobertura de solo obteve maior produtividade, apresentando a média de 79.666 hastes por hectare. O sistema de plantio direto com manejo orgânico demonstrou resultados agronômicos satisfatórios sendo indicado para o cultivo de gladíolos

    AVALIAÇÃO DA RESISTÊNCIA À MUDANÇA NA EDUCAÇÃO SUPERIOR: UMA ANÁLISE DOS SERVIDORES TÉCNICO-ADMINISTRATIVOS DE UNIVERSIDADE PÚBLICA

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    Este artigo tem o objetivo de avaliar o comportamento de resistência à mudança dos servidores técnico-administrativos (TAEs), de uma universidade pública. O estudo se fundamenta no seguinte aporte teórico: o papel dos TAEs na gestão e avaliação das instituições federais de educação superior; gestão da mudança sob a ótica da resistência e atitudes. A abordagem da pesquisa foi de cunho qualitativo e quantitativo. O estudo integra pesquisa documental, bibliográfica e de campo. Para a pesquisa de campo foi elaborado um questionário estruturado, os quais foram analisados por meio da estatística descritiva. A análise e interpretação dos dados foi realizada por meio da triangulação dos dados objetivos (pesquisa de campo) com aporte teórico e pesquisa documental por meio de análises indutivas e dedutivas. Os resultados apontam que a resistência à mudança dos TAEs da IFES objeto deste estudo está relacionada com o medo, baixa autoestima e comodismo. Isto vem ao encontro a literatura que relata que ainda não há uma distinção entre a gestão acadêmica e a gestão administrativa das IFES, apesar do avanço do plano de carreira e desenvolvimento dos TAEs estimular a capacitação e qualificação profissional

    Comportamento agronômico de genótipos de morangueiro submetidos a formas de cultivo

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    O objetivo deste trabalho foi avaliar o desempenho agronômico de dois genótipos de morangueiro submetidos a diferentes formas de cultivo em sistema orgânico de produção. Os genótipos utilizados foram CREA FRF LAM 269.19 (dia curto) e CREA FRF 114.01 (dia neutro). Os morangueiros foram cultivados em solo, calhas, slabs ou vasos. O delineamento experimental foi com arranjo casualizado em sistema bifatorial. As avaliações foram: datas de início de floração, frutificação e colheita; aspectos da planta e de frutas; e aspectos produtivos - produção total; número de frutas, produção comercial; produção de frutas pequenos e; produtividade total. O genótipo CREA FRF 114.01 apresentou maior precocidade de colheita e maior desenvolvimento vegetativo. O cultivo em calha e canteiros proporcionaram maior produção e qualidade de frutas em ambos os genótipos. Nos canteiros, as frutas produzidas apresentaram maior teor de sólidos solúveis em ambos os genótipos. Conclui-se que o genótipo CREA FRF 114.01 associado ao cultivo em canteiros proporcionou melhor aptidão de cultivo nessas condições, melhorando os atributos de qualidade e desenvolvimento no sistema de cultivo orgânico

    Vulnerability Factors for Emergency Planning of the Angra dos Reis Nuclear Power Complex - RJ

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    The Angra dos Reis nuclear power complex, on the southern coast of the state of Rio de Janeiro, has in its geographic space different aspects that integrate the environmental dynamics of its area of influence, where geological, meteorological and demographic factors characterize the region as an environment complex, especially with the projection of emergency actions from an accidental event, especially from the point of view of the evacuation of the population in the impacted areas, presenting particularities that contribute to act as a negative impact in emergency situations, mainly in the phase response to a possible accident. With the support of geographic information systems (GIS), analyzes were made between the susceptibility to landslides and their occurrences (inventory of years 2007-2011), associating the rainfall regime and population density, aspects that demonstrate the vulnerability of the region, especially along the BR-101 highway, with the potential to render escape routes unfeasible in critical situations. The integrated analysis of these factors pointed out that, together, such elements are important bottlenecks for emergency situations in the region, and should be included as critical factors to be analyzed in order to contribute to subsidize actions and guidelines that should be applied in local emergency plannin

    Fatty acids in seed oil of wild and cultivated rosehip (Rosa canina L.) from different locations in Serbia

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    Rosehip (Rosa canina L.) seeds are rich in bioactive compounds and nutrients and hence with a great potential to be employed in production of functional foods. This work aimed to evaluate the fatty acid composition of seed oil from wild and cultivated rosehip collected at different locations in the Republic of Serbia. Unsaturated fatty acids were dominant in majority of seed oil samples, with linoleic (LA), α-linolenic (ALA) and oleic (OA) acids (24.53–46.68 %, 4.73–12.39 % and 3.89–13.82 %, respectively) as the most abundant ones. Based on the analyses of most dominant bands in Raman spectra of seeds (∼1265 and ∼1660 cm-1) characteristic for unsaturated fatty acids, ANOVA revealed significantly higher content in two seed samples (5SW and 10SC). Ratios of UFAs/ SFAs, ω-6/ω-3 and LA/ALA and desirable fatty acids (DFA) indicated that most studied rosehip seed oils showed good quality. Factors such as genetic characteristics and agro-ecological conditions most likely affected FAs composition of seed oils. © 2022 The Author

    Development of Beekeeping: An Analysis Using the Technique of Principal Components

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    Beekeeping is an economic activity of the Brazilian agricultural sector and a powerful tool to achieve sustainable development. However, beekeeping still remains a modest activity compared to other areas, with a lack of technical knowledge and beekeeping practices that need to be standardized. This study represents a proposal for the diagnosis of beekeeping, to facilitate decision-making and to provide a faster development of the beekeeping activity. We investigated the process of adoption of beekeeping practices of 28 beekeepers and the quality of the honey produced by them in the Western region of Paraná, using the technique of Principal Components Analysis after the construction of apicultural indexes. Specifically, the honey produced in the Western region of Paraná be included in the requirements of national and international legislation, but the beekeeping practices adopted still require standardization so that the beekeepers have higher honey production. Also, the transformation of variables into apicultural indexes for later use in the analysis of principal components proved to be efficient to draw a beekeeping profile. Our research proves to be efficient in accurately diagnosing beekeeping bottlenecks, which may enable better decision-making and thus attract new entrepreneurs and increase their relevance to achieve sustainable rural development

    Pervasive gaps in Amazonian ecological research

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    Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

    Pervasive gaps in Amazonian ecological research

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