Épocas de semeadura de plantas de cobertura pós feijão e soja safra
Double summer crop represent high weather risks for the 2nd summer crop and soil use in this period with cover crops is a competitive and viable option. Thus, the objective was to evaluate the accumulation of biomass throughout the cycle of cover plants sown at three different sowing periods: Januar...
| Autor principal: | Pereira, Luara Silva |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Agronomia
2023
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/30913 |
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| Resumo: |
Double summer crop represent high weather risks for the 2nd summer crop and soil use in this period with cover crops is a competitive and viable option. Thus, the objective was to evaluate the accumulation of biomass throughout the cycle of cover plants sown at three different sowing periods: January, February and March. Experiment was carried out in the experimental station of the Federal Technological University of Paraná (UTFPR), Câmpus Dois Vizinhos laid out in a randomized blocks with a 3x3 factorial scheme, being factor A composed of cover crops (Urochloa brizantha cultivar Xaraés, Crotalaria juncea cultivar IAC-KR-1 and Pennisetum glaucum cultivar ANm 38) and factor B of three evaluation periods during crop development (28/03; 12/04 and 29/04) (subplots), with three replications. Plant height, green and dry mass yield were evaluated in each period and the total biomass production at the end of the experiment. P. glaucum exhibited higher productivity of green and dry mass in relation to the other species of cover crops, regardless of the sowing period, showing to be one of the best option to be growth in short periods in the off-season, while presented total dry mass productivity yield of 14,611, 14,155 and 4,200 kg ha-1 when sowed on January (117 days after sowing - DAS), February (86 DAS) and March (58 DAS), respectively. Meanwhile, U. brizantha and C. juncea presented total dry matter yield of 11,677 and 8,800; 8,578 and 8,217 and 2,220 and 2,555 kg ha-1 respectively in January, February and March. These species showed a lower increase in its biomass, but also appears as good options to be used in the offseason period, depending on what is the next crop. Cover crops sown at March showed lower height, accumulation of green and dry mass, due to the reduction of the photoperiod and temperature at this time of the year, even thought, are able to be used due to the benefits it deliver to the production system. |
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