Efeitos do cultivo de alfafa sobre a ciclagem de nutrientes para a cultura do milho
The maintenance of soil cover with the use of alfalfa can be a practice with a good possibility for success in no-tillage (SPD), since it can make nitrogen available to successor plants, such as corn for example, through the FBN process, being economically viable for the producer, in addition to fav...
| Autor principal: | Almeida, Patricia Mara de |
|---|---|
| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
|
| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/28120 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: |
The maintenance of soil cover with the use of alfalfa can be a practice with a good possibility for success in no-tillage (SPD), since it can make nitrogen available to successor plants, such as corn for example, through the FBN process, being economically viable for the producer, in addition to favoring weed control and maintaining soil quality. Thus, the objective of this work was to evaluate alfalfa residues as green manure, and its release of nutrients, especially nitrogen, for the corn crop, seeking to use it as the main supplier of N and reduce the use of fertilizers. The experiment was carried out under a randomized block design in split plots, with four replications. In the main plot, two types of alfalfa residues (dried and not dried) and four doses of N applied in topdressing on the corn crop were evaluated (0, 50, 100 and 200 kg N ha −1 ) in the main plot. subplots. It was found that the production of maize grains cultivated on the area of non-desiccated alfalfa was 32.44% lower than the areas where maize was cultivated on the desiccated alfalfa, which resulted in 7191 kg of grain ha −1 . The result of increased productivity as a function of the application of nitrogen fertilization was homogeneous for both coverage situations and represented by a mean quadratic equation: Y= 6.909 + 31.8x -0.1262X2 R2=0.99. The alfalfa crop was presented as an efficient alternative for soil cover and green manure, because, even having only a small amount of residue of the aerial part of the culture on the ground (1600 kg DM ha−1 ) provided good amounts of nutrients for the
maize grown in succession. |
|---|