%0 Journal Article
%T Agronomic performance and chemical response of sunflower (Helianthus annuus L.) to some organic nitrogen sources and conventional nitrogen fertilizers under sandy soil conditions
%A Helmy
%A Ayman M.
%A Ramadan
%A Mohamed Fawzy
%J Grasas y Aceites
%D 2009
%I Consejo Superior de Investigaciones Cient赤ficas
%X Sunflower (Helianthus annuus L.) is an option for oilseed production, particularly in dry land areas due to good root system development. In this study, two field experiments were performed in the El-Khattara region (Sharkia Governorate, Egypt) during the 2005 season. The objective of this research was to determine the effect of organicnitrogen (ON) sources and their combinations as well as to compare the effect of ON and ammonium sulfate (AS) as a conventional fertilizer added individually or in combination on growth, yield components, oil percentage and the uptake of some macronutrients by sunflowers grown on sandy soil. The treatments of chicken manure (CM) and a mixture of farmyard manure (FYM) with CM were superior to the other treatments and gave the highest yield, dry matter yield, NPK uptake by plants at all growth stages along with seed yield at the mature stage. The effect of the different ON on crop yield and its components may follow the order; CM> palma residues (PR)> FYM. This was more emphasized when the materials were mixed with AS at a ratio of 3:1 and 1:1. The uptake of nitrogen (N), phosphorus (P) and potassium (K) by plants was affected by the addition of different N sources and treatments. The highest nutrient content and uptake by straw were obtained when treated with CM followed by PR at all growth stages, while it was PR followed by CM for seeds. Oil recovery was shown to respond to the N supply and the changes in individual fatty acids were not statistically different. However, it seems that the application of organic fertilizers resulted in an increase in total unsaturated fatty acids compared to the control. El girasol (Helianthus annuus) es una opci車n para la producci車n de semillas oleaginosas, en particular en terrenos arenosos debido al buen desarrollo de sus ra赤ces. En este trabajo, dos estudios de campo fueron realizados en la regi車n de El-Ishattara (Sharkia Governorate, Egypt) durante la estaci車n 2005. El efecto de diversas fuentes de nitr車geno org芍nico (ON) y el de su combinaci車n, as赤 como el efecto de ON y sulfato am車nico (AS) como fertilizante convencional a adido individualmente o en combinaci車n ha sido estudiado en base a su crecimiento, rendimiento de los componentes, porcentaje de aceite y consumo de micronutrientes en girasoles crecidos en suelos arenosos. El tratamiento con esti谷rcol de pollo (CM) y una mezcla de esti谷rcol de corral (FYM) con CM fue superior a otros tratamientos y dio el m芍s alto rendimiento, la mayor cantidad de materia seca, y el mayor consumo de NPK por la planta en todos los estadios de creci
%K Fatty acids
%K Helianthus annuus L
%K Nitrogen sources
%K Organic manures
%K Seed oil
%K Sunflower
%K Sandy soil
%K Aceite de semilla
%K 芍cidos grasos
%K Esti谷rcol org芍nico
%K Girasol
%K Helianthus annuus L.
%K Materias nitrogenadas
%K Suelos arenosos
%U http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/546/560