Resposta da terceira soqueira da cana-de-açúcar à aplicação de nitrogênio na presença e ausência de silício

• Autor(a) principal: Nóia, Natália Regina de Campos [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/128097; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/18-09-2015/000849738.pdf
• topic: Cana-de-açúcar; Ureia; Escoria; Solos - Fertilidade; Nitrogenio na agricultura; Urea

The slag appeared in agriculture as an alternative source of corrective material soil acidity, bringing in its composition silicon, considered a beneficial element for plants. The objective of this study was to evaluate the effect of nitrogen application in coverage associated with the use of slag and limestone on the chemical properties of the soil, nutritional status, the accumulation of N and Si in the leaves and stems, producing stems and the technological quality of the third ratoon of sugarcane. The experiment was carried on without fire husking harvesting system in an Oxisol, medium texture. The design was a randomized block, with treatments arranged in a 5x2 factorial scheme, five nitrogen rates (0, 40, 80, 120 and 160 kg ha- 1) and two corrective materials, slag 0,9 t ha-1 and limestone 1,0 t ha-1, with four replications. They evaluated the soil chemical properties, development, nutritional status, the production of dry matter production of stems and the technological quality of sugarcane. Liming affected the H+Al contents and base saturation at 12 months. There were interactions corrective, N rates and depths at 6 and 12 months. The treatments did not affect the nutritional status and the development of culture, although interaction for dry matter accumulation in the leaves. Nitrogen rates, regardless of the correction did not affect the production of stems and the technological quality of sugarcane