Comportamento de potássio e fósforo no solo em um sistema de integração lavoura-pecuária com adubação de sistemas
Due to the complexity of the crop-livestock integration system (ILP), potassium (K) and phosphorus (P) may behave differently from other systems that do not involve the presence of animals. This is due to the fact that the animals cause alterations in the pasture and the soil during the winter, bein...
| Autor principal: | Lanzarin, Ronaldo Junior |
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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/1/14143 |
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| Resumo: |
Due to the complexity of the crop-livestock integration system (ILP), potassium (K) and phosphorus (P) may behave differently from other systems that do not involve the presence of animals. This is due to the fact that the animals cause alterations in the pasture and the soil during the winter, being able to alter the dynamics of potassium and phosphorus. The objective of this work was to evaluate the dynamics of K and P in the soil as a function of time of nitrogen fertilization, pasture height and nitrogen doses, in a system involving ryegrass pasture, corn silage and bean in second crop. The study evaluated whether the ILP system is being sustainable, besides allowing to see how best to conduct it and which are the main agents capable of influencing nutrient dynamics. The experiment was carried out in the city of Abelardo Luz - SC, at Pacheco Farm, which is managed under the Livestock and Livestock Integration (ILP) system since 2012. The present study found that the K content had a difference in the zero dose of N, where N-Grain fertilization the potassium content was higher in relation to N-pasture fertilization. This result is due to the interaction between the three factors: N time (N-grazing, N-grazing), grazing height and N doses in second-season beans. These adopted management caused changes in the nutrient absorption provided by the ryegrass due to the application of N and the lower grazing pressure. It was not observed the occurrence of K leaching in the soil, because the concentration of K followed a decreasing tendency as the profile sampling deepened. The P in the soil had no change in its behavior due to the management of grazing height, N time, and N doses. Although the P in the soil became more soluble due to the management adopted. This is due to the content of phosphorus present in the waste (faeces and straw), be in a more soluble form, and may cause some kind of alteration in the behavior of this nutrient. Therefore, crop-livestock integration promotes the complex interaction of these managements, providing to the soil the mitigation of the impacts providing by livestock and to the producer allows, with this performance, greater profitability. |
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