Experiencias con fertilizantes en suelos gallegos. I. Acción combinada de los fertilizantes orgánicos y minerales sobre la producción y el contenido en proteína de maíces híbridos
[EN] Account is given of the results of complete ferlilizers and manure on the yield and per cent grain protein content of hybrid corn in sandy soil of the Pontevedra province. It is concluded that: Nitrogen was found to be the most limiting factor for corn production. Corn yields for good hybrids i...
| Autores: | , , |
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| Formato: | artículo |
| Fecha de publicación: | 1954 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/60642 |
| Acesso em linha: | http://hdl.handle.net/10261/60642 |
| Access Level: | acceso abierto |
| Palavra-chave: | Fertilizantes Galicia Fertilizers Suelos agricolas Agricultural soils |
| Resumo: | [EN] Account is given of the results of complete ferlilizers and manure on the yield and per cent grain protein content of hybrid corn in sandy soil of the Pontevedra province. It is concluded that: Nitrogen was found to be the most limiting factor for corn production. Corn yields for good hybrids increased about 1,60O kgs/ha for 110 kgs/ha of nitrogen applied. With a relatively non-prolific hybrid the increasing was 3OO kgs/ha for the addition of 130 kgs/ha of nitrogen. The response to potash, with a medium-high level K2O in the soil, appeared to become the optimum yielding when 30 kgs/ha K20 is applied, one half the value conventionaly used in this zone. The vegetative response to phosphate applications was maximum with the addition of 39 kgs/ha P2O5, with a medium elemental phosphorus level in the soil. The yield was induced by various forms in the nitrogen additions, getting, in all cases, an advantage, having the nitrogen plowed under. Humid climatic conditions influenced the amount of response; the maximum yield was when the nitrogen fertilizer was applied in two times; under droughty conditions the best yields were obtained when the nitrogen carrier was applied once plowing under before sowing. Nitrogen applications at various levels increased the protein content in the grain very much in most experiments. The greater increase obtained was 21 per cent refering on the plots receiving no nitrogen. The addition of 78 kgs/ha P2O5, as superphosphate, to the nitrogen treatments permitted only a 10.5 increased in the per cent protein content of grain. |
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