Desempenho agronômico e forrageiro de cultivares de aveia no sul do Brasil
Besides the oat forage being widely used by agriculturists in Southern Brazil in the winter as soil cover and for cattle farming, many of them use stored seeds and have little knowledge about the characteristics of these seeds and of certified cultivars available in the market. Thus, this paper aime...
| Autor principal: | André, Vitor |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/28429 |
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| Resumo: |
Besides the oat forage being widely used by agriculturists in Southern Brazil in the winter as soil cover and for cattle farming, many of them use stored seeds and have little knowledge about the characteristics of these seeds and of certified cultivars available in the market. Thus, this paper aimed to assess the agronomic and forage performance of white and black oats used in the region. Also searching, to verify the relation between the nitrogen and chlorophyll content, since in many cultivars this correlation is used to define the nitrogen fertilization management. The experiment was performed in a private property in Vitorino-PR in 2021 with 4 oat cultivars, 2 white oat (AF 1340 and URS F FLETE) and two black oat ones (Stored seeds and BRS 139), in the randomized blocks outlining, with 4 repetitions. The analyzed variables were pasture height, average and cumulative forage dry mass, tillers population density, relation leave/stem, forage density, nitrogen content of the plant and chlorophyll a and b content during different periods (Period 1: June 11th -July 10th; Period 2: July 7th - August 7th; Period 3: August 8th - September 9th and Period 4: September 4th - October 2nd). For analysis purposes, four oat cultivars combinations were considered X four evaluation periods. The dry mass variables by period, tillers population density in the pasture area, forage density in the pasture area, average forage dry mass in the pasture area and the average forage dry mass in the cages were analyzed with the use of repeated measures overtime, for the nitrogen content in the pasture area the relation between leave/stem it was used a traditional factor scheme and for the nitrogen content in the cages plots subdivided in time. The interaction outcome between the factors periods and cultivars was done by the Tukey test (α= 5%). The Pearson correlation analysis was used to verify the linear relationship between the nitrogen and chlorophyll content in the pasture and the exclusion cages. The black oat coming from stored seeds presented similar production of forage dry mass to certified seeds cultivars (AF 1340, URS F FLETE e BRS 139). The white oat cultivars presented higher relation leave/stem than the black oat cultivars during the whole vegetative cycle of the crop. For the white oat cultivars (AF 1340 and URS F FLETE) and the black oat (Stored and BRS 139) the chlorophyll meter mustn’t be used to estimate the N content in the plant. |
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