Artigo
Adubação nitrogenada em cobertura no girassol irrigado nas condições de Cassilândia-MS
Fecha
2008-09-01Registro en:
Ciência e Agrotecnologia. Lavras: Universidade Federal de Lavras (UFLA), v. 32, n. 5, p. 1366-1373, 2008.
1413-7054
S1413-70542008000500002
WOS:000261816400002
S1413-70542008000500002.pdf
Autor
Universidade Federal da Grande Dourados (UFGD)
Universidade Estadual de Mato Grosso do Sul (UEMS)
Universidade Federal Rural do Semi-Árido (UFERSA)
Universidade Estadual Paulista (Unesp)
Resumen
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.