Efeito físico de cobertura de inverno de aveia preta (Avena strigosa) e azevém (Lolium multiflorum) sobre plantas daninhas da cultura do milho
Nowadays, weeds have been very prominent in the no - tillage system, so we must seek agricultural practices that help control them. The objective of this work was to evaluate the physical and suppressive effects of cover crops such as black oats (Avena strigosa) and ryegrass (Lolium multiflorum) on...
| Autor principal: | Klein, Luíz Felipe |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/10687 |
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| Resumo: |
Nowadays, weeds have been very prominent in the no - tillage system, so we must seek agricultural practices that help control them. The objective of this work was to evaluate the physical and suppressive effects of cover crops such as black oats (Avena strigosa) and ryegrass (Lolium multiflorum) on weed infestation in maize (Zea mays) under no - tillage system. In order to carry out the experiment, the two cover species were implanted in different population densities: oats (40 kg ha-1, 80 kg ha-1 and 160 kg ha-1) ryegrass (15 kg ha-1, 30 kg ha-¹ and 60 kg ha-¹) plus control (fallow), where each treatment had four replicates. Cover plants were implanted in the haul. In the flowering stage, two samples of oats, ryegrass and the plants thatfunction in the fallow plot were determined for the determination of the dry matter mass. At 60 days after the desiccation of the cover plants, weeds were collected in each treatment (species, species frequency, density, abundance, relative frequency, relative abundance, relative abundance and importance value index). to be able to observe if there would be some physical effect caused in the weeds, and which plants are more susceptible and more tolerant to the physical effects of the cover straw. It is possible to affirm that plants of Bidens pilosa, Raphanus raphanistrum and Euphorbia heterophylla presented higher Value and Significance Index at practically all seeding densities of cover crops and fallow. Plants of Digitaria horizontalis and Brachiaria plantaginea showed lower Value and Importance Index, and it can be stated that the different sowingdensities of the cover plants presented physical effects on these species. The different sowing densities of the cover crops and the fallow did not present a significant difference in dry matter production. The different sowing densities of the cover crops and the population dynamics of the weeds did not influence under the yield components of the maize crop. |
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