Author/Authors :
Honório Guedes Filho, Doroteu Department of Agricultural Engineering - Federal University of Campina Grande - Av. Aprigio Veloso - 882 - Campina Grande - Paraiba, Brazil , Helena Garófalo Chaves, Lucia Department of Agricultural Engineering - Federal University of Campina Grande - Av. Aprigio Veloso - 882 - Campina Grande - Paraiba, Brazil , Batista Campos, Vinícius Federal Institute of Amapa - Av. Tancredo Neves - 2.965 - Campus Laranjal Do Jari - Macapá - Amapá, Brazil , Amilton Santos Júnior, José Department of Agricultural Engineering - Federal University of Campina Grande - Av. Aprigio Veloso - 882 - Campina Grande - Paraiba, Brazil , Tadeu Lima de Oliveira, João Department of Agricultural Engineering - Federal University of Campina Grande - Av. Aprigio Veloso - 882 - Campina Grande - Paraiba, Brazil
Abstract :
In order to study the effects of nitrogen and available soil water levels on growth and yield components of sunflower (cv. Embrapa 122 / V-2000), an experiment was carried out from November 2009 to October 2010 in the Agricultural Engineering Department of the Federal University of Campina Grande, Campina Grande, Paraiba, Brazil. The treatments were arranged as a completely randomized design, in a 4×4 factorial experiment (four nitrogen levels and four available soil water levels), with three replications, totaling 48 experimental units. The nitrogen (N) levels in kg haG1 were: 0; 60; 80 and 100 added as urea; the available soil water (AW) levels were 55; 70; 85 and 100%. In conclusion, this study showed that the application of nitrogen
fertilizer levels and available soil water levels led to significant increase in growth and production traits except for the dry weight of 1000 seeds.
