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Resumo(s)
O gerenciamento de pastagens é o fator-chave dos sistemas integração lavoura-pecuária (ILP), sendo necessário entender o crescimento de plantas e animais. O fertilizante nitrogenado é outro fator importante para ILP, porque a disponibilidade deste nutriente controla os processos de fluxo e composição química dos tecidos. Dentro deste breve contexto, experimentos realizados para avaliar aspectos relacionados à interface solo-planta-animal, demonstraram os benefícios da ILP. No entanto, não há registros de como os tratamentos aplicados, altura de manejo da pastagem (alta e baixa) e épocas de aplicação de N (pastagem e cultivo de grãos) podem influenciar a capacidade de estabelecimento de pastagens. Assim, o objetivo deste estudo foi avaliar a produção de forragem de gramíneas temperadas (C3) durante a fase de estabelecimento (isto é, entre a semeadura e a primeira pastagem). As espécies forrageiras avaliadas foram aveia preta (Avena strigosa L.) e azevém anual (Lolium multiflorum Lam.). O experimento foi conduzido em uma área de 14 ha, onde vem sendo realizado um experimento de longo prazo em ILP com plantio direto em Abelardo Luz / SC. O delineamento experimental foi blocos ao acaso, com três repetições e tratamentos organizados em esquema fatorial (2x2). Foram analisadas as seguintes variáveis: massa de forragem, estrutura do dossel (composição morfológica, densidade de forragem, altura de dossel, comprimento da bainha e da lâmina livre de bainha, altura do dossel, densidade populacional de perfilhos, índice de acamamento e valor nutritivo. Concluiu-se que o histórico de épocas de adubação nitrogenada e altura da pastagem não afetam a produtividade inicial e o estabelecimento de gramíneas temperadas (C3) em ILP de plantio direto.
Pasture management is a key-factor of integrated crop-livestock systems (ICLS), being necessary to understand plant and animal growth. The nitrogen fertilizer is another important factor to ICLS, because the availability of this nutrient controls the processes of flow and chemical composition of tissues. Within this brief context, experiments conducted to assess aspects related to soil-plant-animal interface, has been demonstrated the benefits of ICLS. However, there are no records of how the treatments applied, pasture management heights (high and low) and times of N application (pasture and cultivation of grains), can influence the capacity of establishment of pastures. Thus, the objective of this study is to evaluate forage production of temperate (C3) grasses during the establishment phase (i.e. between sowing and the first grazing). Forage species evaluated were black oats (Avena strigosa L.) and annual ryegrass (Lolium multiflorum Lam.). The experiment was conducted in a 14 ha area, where is being conducted a long-term experiment with non-tillage ICLS in Abelardo Luz/SC. The experiment design was randomized blocks, with three replications, and treatments arranged in a factorial scheme (2x2). The following variables were analyzed: forage mass, canopy structure (morphological composition, bulk density, extended tiller, stem and free-lamina length, canopy height, tiller population density, lodging index, and nutritive value. It was concluded that the historical of nitrogen fertilization and pasture height do not affect the initial productivity and establishment of temperate (C3) grasses in non-tillage ICLS.
Pasture management is a key-factor of integrated crop-livestock systems (ICLS), being necessary to understand plant and animal growth. The nitrogen fertilizer is another important factor to ICLS, because the availability of this nutrient controls the processes of flow and chemical composition of tissues. Within this brief context, experiments conducted to assess aspects related to soil-plant-animal interface, has been demonstrated the benefits of ICLS. However, there are no records of how the treatments applied, pasture management heights (high and low) and times of N application (pasture and cultivation of grains), can influence the capacity of establishment of pastures. Thus, the objective of this study is to evaluate forage production of temperate (C3) grasses during the establishment phase (i.e. between sowing and the first grazing). Forage species evaluated were black oats (Avena strigosa L.) and annual ryegrass (Lolium multiflorum Lam.). The experiment was conducted in a 14 ha area, where is being conducted a long-term experiment with non-tillage ICLS in Abelardo Luz/SC. The experiment design was randomized blocks, with three replications, and treatments arranged in a factorial scheme (2x2). The following variables were analyzed: forage mass, canopy structure (morphological composition, bulk density, extended tiller, stem and free-lamina length, canopy height, tiller population density, lodging index, and nutritive value. It was concluded that the historical of nitrogen fertilization and pasture height do not affect the initial productivity and establishment of temperate (C3) grasses in non-tillage ICLS.
Descrição
Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná
Palavras-chave
Integração lavoura-pecuária Adubação de sistemas Vazio forrageiro