Publicações - ciências agrárias
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Thiago Floriani Stepka;
DE MATTOS, PATRÍCIA PÓVOA;
Afonso Figueiredo Filho;
Sebastião do Amaral Machado;
BRAZ, EVALDO MUÑOZ
Palavra-chave:
Dendrochronology;
Diametric growth modeling;
Forest dinamic
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Manejo Florestal; Dendrometria e Inventário Florestal
resumo ...
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KUROSKI CONSTANTINO, JOÃO HENRIQUE;
IKEDA, ANGELA;
SANT'ANNA-SANTOS, BRUNO FRANCISCO;
BOMFIM DE ALCANTARA, GIOVANA
Palavra-chave:
plant embryo;
palm tree;
Micropropagation;
dichlorophenoxyacetic acid (2,4-D);
gibberellic acid (GA3);
tetrazolium
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Tecnologia de Alimentos
resumo ...
(en)
Syagrus romanzoffiana (Cham.) Glassman (Arecaceae) also known as queen palm, is a species of palm, widely distributed in Brazil. The queen palm is present in the food of animals and humans who consume both the fruit and the heart of palm. The species also has medicinal, ornamental and ecological importance. In vitro cultivation facilitates the germination of S. romanzoffiana, in which it is possible to obtain a high morphogenetic response. Thus, the objectives of the present work were to establish a protocol for the in vitro germination of S. romanzoffiana from the culture of zygotic embryos and to describe a methodology for the evaluation of the embryo viability with the use of tetrazolium. For this, fruits of S. romanzoffiana were collected, the embryos were excised and cultivated with dichlorophenoxyacetic acid (2,4-D) or gibberellic acid (GA3), in two experiments. In addition, the exposure time and concentration of tetrazolium were evaluated for embryo viability. The results showed that 39.4% of the embryos cultivated with 2,4-D and 25% cultivated with GA3 developed into seedlings. No significant difference in mass was found for seedlings developed with treatment with 2,4-D and GA3. In the tetrazolium test, 75% of the S. romanzoffiana embryos were considered viable. The in vitro germination protocol for S. romanzoffiana showed satisfactory germination results (32.2%) with only 27% contamination of the culture media.
(pt)
Syagrus romanzoffiana (Cham.) Glassman (Arecaceae) also known as queen palm, is a species of palm, widely distributed in Brazil. The queen palm is present in the food of animals and humans who consume both the fruit and the heart of palm. The species also has medicinal, ornamental and ecological importance. In vitro cultivation facilitates the germination of S. romanzoffiana, in which it is possible to obtain a high morphogenetic response. Thus, the objectives of the present work were to establish a protocol for the in vitro germination of S. romanzoffiana from the culture of zygotic embryos and to describe a methodology for the evaluation of the embryo viability with the use of tetrazolium. For this, fruits of S. romanzoffiana were collected, the embryos were excised and cultivated with dichlorophenoxyacetic acid (2,4-D) or gibberellic acid (GA3), in two experiments. In addition, the exposure time and concentration of tetrazolium were evaluated for embryo viability. The results showed that 39.4% of the embryos cultivated with 2,4-D and 25% cultivated with GA3 developed into seedlings. No significant difference in mass was found for seedlings developed with treatment with 2,4-D and GA3. In the tetrazolium test, 75% of the S. romanzoffiana embryos were considered viable. The in vitro germination protocol for S. romanzoffiana showed satisfactory germination results (32.2%) with only 27% contamination of the culture media.
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GAVELAKI, FABIANA;
FREITAS MELO, VANDER;
Favaretto, Nerilde;
DE ALBUQUERQUE, CARLA GOMES;
Motta, Antonio Carlos Vargas;
DA ROCHA, GRAZIELLI;
Volnei Pauletti
Palavra-chave:
Fósforo;
Química do Solo;
Solo orgânico
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Ciência do Solo; Química do Solo;
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Fertilidade do Solo e Adubação
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MORAES, CAROLINA;
PEREIRA DA SILVA FILHO, DANIEL;
NAVROSKI, MÁRCIO CARLOS;
DE OLIVEIRA PEREIRA, MARIANE;
DE OLIVEIRA, LUCIANA MAGDA;
MIRANDA, IVAN ADELKE;
NASCIMENTO, BRUNO;
Alessandro Camargo Angelo;
NICOLETTI, MARCOS FELIPE;
MANTOVANI, ADELAR
Palavra-chave:
Sequoia sempervirens;
Sequoiadendron giganteum;
Pseudotsuga menziesii;
Sementes florestais;
produção de mudas;
Ecofisiologia vegetal
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Tecnologia de Alimentos;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Florestamento e Reflorestamento
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CAMPOS, MARINA LAZZARI DE CARVALHO;
RAHAL, SHEILA CANEVESE;
ROLIM, LUNA SCARPARI;
MESQUITA, LUCIANE DOS REIS;
CASSANEGO, GUILHERME RECH;
André Luis Filadelpho;
RECH, VIVIAN FERREIRA
Palavra-chave:
Sistema Digestório;
Endoscopia;
quatis
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Medicina Veterinária; Medicina Veterinária;
CIENCIAS_AGRARIAS; Medicina Veterinária; Animais Selvagens
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Pedro R. V. Fariña;
rodrigo roani;
Horácio M. Mazero;
Luciane L. do Prado;
gabriela naldony;
Josiane B. dos Santos;
André Carlos Auler
Palavra-chave:
Core method;
Jolly balance method;
Paraffin-coated clod method;
Representative elementary volume;
Analysis of covariance
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Física do Solo
resumo ...
(en)
Soil bulk density (BD) serves as a crucial physical property for characterizing soils and assessing the quality of their management systems. Various methods, including the Core, Clod, and Jolly balance (JBM) methods, are employed for BD measurement. However, these methods can yield significantly different measurements due to analytical errors. This study aims to assess the accuracy of these methods in a clayey Oxisol under different management conditions, while also identifying primary experimental errors in BD determination and strategies for their mitigation. Different statistical approaches were employed to analyze the impacts of sample volume, paraffin temperature, and management systems on BD determination methods. Method accuracy exhibited variation among management systems, particularly notable in secondary forest (SF) areas. In these areas, Core-based BD measurements were 37% lower than those obtained by the Clod and JBM methods. This disparity can be attributed to the higher macroporosity observed in SF, leading to greater sample volume loss and smaller volumes analyzed by the Clod and JBM. A correlation between paraffin temperature for sample coating and clod volume was observed, with paraffin temperature affecting BD measurements only in clods larger than 69.9 cm3. The paraffin temperature inducing the lowest mean error for larger clods was 92°C. For clods smaller than 69.9 cm3, BD measurement errors arose due to inadequate sample volume. Representative elementary volume was identified as a means to mitigate BD overvaluation by the Clod method. A volume of 99 cm3 proved effective in reducing mean BD errors to 5%, making it suitable for both field sampling and laboratory analytical procedures.
(pt)
Soil bulk density (BD) serves as a crucial physical property for characterizing soils and assessing the quality of their management systems. Various methods, including the Core, Clod, and Jolly balance (JBM) methods, are employed for BD measurement. However, these methods can yield significantly different measurements due to analytical errors. This study aims to assess the accuracy of these methods in a clayey Oxisol under different management conditions, while also identifying primary experimental errors in BD determination and strategies for their mitigation. Different statistical approaches were employed to analyze the impacts of sample volume, paraffin temperature, and management systems on BD determination methods. Method accuracy exhibited variation among management systems, particularly notable in secondary forest (SF) areas. In these areas, Core-based BD measurements were 37% lower than those obtained by the Clod and JBM methods. This disparity can be attributed to the higher macroporosity observed in SF, leading to greater sample volume loss and smaller volumes analyzed by the Clod and JBM. A correlation between paraffin temperature for sample coating and clod volume was observed, with paraffin temperature affecting BD measurements only in clods larger than 69.9 cm3. The paraffin temperature inducing the lowest mean error for larger clods was 92°C. For clods smaller than 69.9 cm3, BD measurement errors arose due to inadequate sample volume. Representative elementary volume was identified as a means to mitigate BD overvaluation by the Clod method. A volume of 99 cm3 proved effective in reducing mean BD errors to 5%, making it suitable for both field sampling and laboratory analytical procedures.
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Motta, Antonio Carlos Vargas;
DE PIERRI, LETÍCIA;
Lipski, Bernardo;
MELO, VANDER FREITAS;
LIMA, MARIA FERNANDA DAMES SANTOS;
ERCOLE, TAMIRES MAIARA;
BASTOS, LEONARDO PUSSIELDI;
CORRÊA, RODRIGO STUDART
Palavra-chave:
contaminação ambiental;
metais pesados
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Manejo e Conservação do Solo;
CIENCIAS_AGRARIAS; Agronomia; Ciência do Solo; Fertilidade do Solo e Adubação
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Paula Luize Lessmann;
IKEDA, ANGELA;
ALCANTARA, GIOVANA BOMFIM
Palavra-chave:
Base de dados;
biotecnologia florestal;
pesquisa
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Silvicultura; Genética e Melhoramento Florestal
resumo ...
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IURK, MARIÂNGELA CESCHIM;
DLUGOSZ, FERNANDO LUÍS;
DANIELA BIONDI
Palavra-chave:
Estudantes;
Colégios estaduais;
paisagem;
Remanescentes Florestais
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Conservação da Natureza; Educação Ambiental;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Conservação da Natureza; Recuperação de Areas Degradadas;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal
resumo ...
(en)
A Educação Ambiental nas escolas pode ser uma excelente alternativa para a diminuição de processos de fragmentação e paisagem e ações de educação ambiental podem ser mais efetivas em estudantes de ensino médio. Para tanto, analisou o conhecimento, postura e atitudes relacionados aos remanescentes florestais, entre os colégios urbanos e do campo e entre os gêneros masculino e feminino, bem como a influência de tablets e smartfones como instrumento de educação ambiental. Os estudantes envolvidos no estudo pertenciam as turmas de primeiros anos do ensino médio de 11 colégios estaduais do município de Irati. Ao todo foram envolvidos 718 estudantes no pré-teste e 654 no pós-teste. O aplicativo desenvolvido para essa pesquisa foi bem aceito pelos estudantes, assim como muito bem avaliado pelos mesmos, onde se pode perceber a importância desse tipo de estratégia na educação ambiental.
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ECCEL, CAMILA;
POITEVIN, CAROLINA GRACIA;
MARTINS, CARLOS EDUARDO NOGUEIRA;
ZIMMERMANN, RUBENS CANDIDO;
GIRALDI, GREISSI TENTE;
FOERSTER, LUÍS AMILTON;
DE BITENCOURT FRASSON, VINÍCIUS;
CHAABAN, AMANDA;
DO AMARAL, WANDERLEI;
Beatriz Helena Lameiro Noronha Sales Maia;
DOS SANTOS, ELAINE FERNANDA
Palavra-chave:
Baccharis;
essential oil;
pesticide
resumo ...
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