Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas
Conyza sp., Digitaria insularis and Chloris sp. are observed as weeds plants in agricultural areas, in addition, its resistance to herbicides and the high proliferation of these species make their management difficult. Management strategies are used to minimize the occurrence of damaged plants in ag...
| Autor principal: | Jakubski, Juliana Domanski |
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| Formato: | Dissertação |
| Idioma: | Português |
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Universidade Tecnológica Federal do Paraná
2020
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riut-1-50022020-06-03T06:01:18Z Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas Growth analysis of Conyza sp., Digitaria insularis and Chloris sp. under different light conditions Jakubski, Juliana Domanski Moraes, Pedro Valério Dutra de http://lattes.cnpq.br/2831331040980295 Tarouco, Camila Peligrinotti https://orcid.org/0000-0002-9488-9773 http://lattes.cnpq.br/9442489535563009 Adami, Paulo Fernando https://orcid.org/0000-0002-9605-2352 http://lattes.cnpq.br/9289119211222717 Moraes, Pedro Valério Dutra de http://lattes.cnpq.br/2831331040980295 Botânica - Morfologia Ervas daninhas - Controle Plantas - Efeito da luz Botany - Morphology Weeds - Control Plants - Effect of light on CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA::MATOLOGIA Agronomia Conyza sp., Digitaria insularis and Chloris sp. are observed as weeds plants in agricultural areas, in addition, its resistance to herbicides and the high proliferation of these species make their management difficult. Management strategies are used to minimize the occurrence of damaged plants in agricultural areas, among them is the cultivation of cover plants, the choice of cultivating species with a robust canopy, shading the soil and already emerged weed plants, seeking to use its growth and development. However, some weeds may have their growth altered due to shading. The objective of the work was to evaluate the growth and development of Conyza sp., Digitaria insularis and Chloris sp. in two light conditions, full sun and artificially shaded. Experiment began with the germination of weed plant seeds in the laboratory for later transplants to the experimental units, which were 12-liter containers filled with soil. After the transplant and the adaptation carried out for 20 days in mild conditions of light and temperature, the experimental units were allocated to full sun and shade (50% shade), in an open randomized design, with four replications. During the 155 days after the transplant, destructive samples were collected for the estimates. The evaluations were carried out every 15 days, totaling 10 treatments. Height, dry matter, aerial part, leaf area, number of leaves, length of roots, dry matter of roots and green matter. To analyze these results, non-linear regressions were used. These variables also contributed to the construction of graphs for biological research of species, relative and absolute growth. For Conyza sp. an increase in the variables evaluated was observed in the shade compared to plants kept in full sun, the plants showed slow growth during a good part of the evaluation period. Digitaria insularis plants showed similar results among plants exposed to the sun and shade, with slow growth initially, in addition to a senescence period and two flowering phases. While for Chloris sp. shaded plants did not show good development in this condition, preferring environments with greater luminosity to develop, presenting slow initial growth in addition to flowering at the end of the evaluation period. As plantas daninhas, Conyza sp., Digitaria insularis e Chloris sp. são observadas como infestantes em áreas agrícolas, além disso, a resistência a herbicidas e alta proliferação destas espécies dificultam seu manejo. Estratégias de manejo são utilizadas para minimizar a ocorrência de plantas daninhas em áreas agrícolas, entre elas está o cultivo de plantas de cobertura, escolha de cultivares com dossel robusto, a fim de favorecer o sombreamento do solo e de plantas já emergidas, buscando minimizar o seu crescimento e desenvolvimento. Nesse sentido, algumas plantas daninhas podem ter seu crescimento alterado diante do sombreamento. O objetivo do trabalho foi avaliar o crescimento e desenvolvimento de Conyza sp., Digitaria insularis e Chloris sp. em duas condições luminosas, sol pleno e sombreadas artificialmente. A condução do experimento se iniciou com a germinação das sementes das plantas daninhas em laboratório para posterior transplante nas unidades experimentais, que eram vasos de 12 litros preenchidos com solo, após o transplante e adaptação realizada por 20 dias em condições amenas de luminosidade e temperatura, as unidades experimentais foram alocadas a sol pleno e sombra (sombrite 50%), em delineamento inteiramente casualizado, com quatro repetições. Durante os 155 dias após o transplante, foram realizadas coletadas destrutivas para as avaliações. As avaliações eram realizadas a cada 15 dias, totalizando 10 tratamentos. Avaliou-se altura, matéria seca da parte aérea, área foliar, número de folhas, comprimento das raízes, matéria seca das raízes e matéria seca total. Para análise desses resultados foi utilizado de regressões não-lineares. Essas variáveis também contribuíram para construção de gráficos para produtividade biológica das espécies, crescimento relativo e absoluto. Para Conyza sp. foi observado aumento das variáveis avaliadas a sombra comparado as plantas mantidas em pleno sol, as plantas manifestaram crescimento lento durante boa parte do período avaliativo. Plantas de Digitaria insularis apresentaram resultados semelhantes entre plantas expostas ao sol e sombra, com crescimento lento inicialmente, além de um período de senescência e duas fases de florescimento. Enquanto que para Chloris sp., plantas sombreadas não apresentaram bom desenvolvimento nesta condição, preferindo ambientes com maior luminosidade para se desenvolver, apresentando crescimento inicial lento além de florescimento ao final do período avaliativo. 2020-06-02T18:46:05Z 2020-06-02T18:46:05Z 2020-03-10 masterThesis JAKUBSKI, Juliana Domanski. Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas. 2020. Dissertação (Mestrado em Agroecossistemas) - Universidade Tecnológica Federal do Paraná, Dois Vizinhos, 2020. http://repositorio.utfpr.edu.br/jspui/handle/1/5002 por openAccess application/pdf Universidade Tecnológica Federal do Paraná Dois Vizinhos Brasil Programa de Pós-Graduação em Agroecossistemas UTFPR |
| institution |
Universidade Tecnológica Federal do Paraná |
| collection |
RIUT |
| language |
Português |
| topic |
Botânica - Morfologia Ervas daninhas - Controle Plantas - Efeito da luz Botany - Morphology Weeds - Control Plants - Effect of light on CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA::MATOLOGIA Agronomia |
| spellingShingle |
Botânica - Morfologia Ervas daninhas - Controle Plantas - Efeito da luz Botany - Morphology Weeds - Control Plants - Effect of light on CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA::MATOLOGIA Agronomia Jakubski, Juliana Domanski Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| description |
Conyza sp., Digitaria insularis and Chloris sp. are observed as weeds plants in agricultural areas, in addition, its resistance to herbicides and the high proliferation of these species make their management difficult. Management strategies are used to minimize the occurrence of damaged plants in agricultural areas, among them is the cultivation of cover plants, the choice of cultivating species with a robust canopy, shading the soil and already emerged weed plants, seeking to use its growth and development. However, some weeds may have their growth altered due to shading. The objective of the work was to evaluate the growth and development of Conyza sp., Digitaria insularis and Chloris sp. in two light conditions, full sun and artificially shaded. Experiment began with the germination of weed plant seeds in the laboratory for later transplants to the experimental units, which were 12-liter containers filled with soil. After the transplant and the adaptation carried out for 20 days in mild conditions of light and temperature, the experimental units were allocated to full sun and shade (50% shade), in an open randomized design, with four replications. During the 155 days after the transplant, destructive samples were collected for the estimates. The evaluations were carried out every 15 days, totaling 10 treatments. Height, dry matter, aerial part, leaf area, number of leaves, length of roots, dry matter of roots and green matter. To analyze these results, non-linear regressions were used. These variables also contributed to the construction of graphs for biological research of species, relative and absolute growth. For Conyza sp. an increase in the variables evaluated was observed in the shade compared to plants kept in full sun, the plants showed slow growth during a good part of the evaluation period. Digitaria insularis plants showed similar results among plants exposed to the sun and shade, with slow growth initially, in addition to a senescence period and two flowering phases. While for Chloris sp. shaded plants did not show good development in this condition, preferring environments with greater luminosity to develop, presenting slow initial growth in addition to flowering at the end of the evaluation period. |
| format |
Dissertação |
| author |
Jakubski, Juliana Domanski |
| author_sort |
Jakubski, Juliana Domanski |
| title |
Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| title_short |
Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| title_full |
Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| title_fullStr |
Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| title_full_unstemmed |
Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas |
| title_sort |
análise de crescimento de conyza sp., digitaria insularis e chloris sp. sob diferentes condições luminosas |
| publisher |
Universidade Tecnológica Federal do Paraná |
| publishDate |
2020 |
| citation |
JAKUBSKI, Juliana Domanski. Análise de crescimento de Conyza sp., Digitaria insularis e Chloris sp. sob diferentes condições luminosas. 2020. Dissertação (Mestrado em Agroecossistemas) - Universidade Tecnológica Federal do Paraná, Dois Vizinhos, 2020. |
| url |
http://repositorio.utfpr.edu.br/jspui/handle/1/5002 |
| _version_ |
1805303732051640320 |
| score |
10,814766 |