Adubação nitrogenada em cobertura no girassol irrigado nas condições de Cassilândia-MS
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Data
2008-09-01
Autores
Biscaro, Guilherme Augusto
Machado, Joao Riquelme
Tosta, Mauro da Silva
Mendonca, Vander
Soratto, Rogério Peres [UNESP]
de Carvalho, Laercio Alves
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Lavras (UFLA)
Resumo
Nitrogen is the most required nutrient by plants for exerting important functions in the vegetable metabolism. In sunflower crop, its efficiency causes nutritional disorder, being the nutrient that most limits the yield. Besides, high doses may increase the incidence of pests and diseases, affecting the yield. Hereafter, this experiment was carried out with the aim of evaluating the response of the irrigated sunflower crop (Helianthus annuus L.) submitted to different doses of side dressing nitrogen fertilization applied uncovered nitrogen in small parts. A randomized complete block design, with four replications was used. The constituted by four doses of nitrogen (0, 20, 40, and 80 kg ha(-1)), as urea. Side dressing nitrogen fertilization provides increase in all characteristics studied, and the dose of N of maxim suitable technical efficiency to have a good yield is of 55 kg ha(-1) of N for the cultivation of the sunflower irrigated in the region of Cassilandia, Mato Grosso do Sul State.
Descrição
Palavras-chave
Helianthus annuus L, sunflower, mineral nutrition, irrigation, yield
Como citar
Ciência e Agrotecnologia. Lavras: Universidade Federal de Lavras (UFLA), v. 32, n. 5, p. 1366-1373, 2008.