Use of organic manure and nitrogen fertilizers on sunflower (Helianthus annus) in attendance of Egyptian broomrape (Orobanche aegyptiaca)

This experiment was done to evaluate the effects of organic manure and nitrogenous fertilizers on some yield components of sunflower (Helianthus annus) as host plant and growing factors of broomrape (Orobanche aegyptiaca). The experiment was arranged as factorial experiments in randomized complete blocks design with three replications in Shahriar، Iran. First factor was conducted in three levels consisting of: control، cow manure (10% of each pot) and jift (10% of each pot). Second factor carried out in six levels consisting of: control، ammonium sulphate، ammonium phosphate، potassium nitrate، urea، ammonium nitrate. For all kinds of nitrogenous fertilizers (except control) level of pure nitrogen was 3ppm. The results showed that organic soil amendment had a significant effect on yield components of sunflower and the stem number and dry weight of broomrape. Cow manure decreased the dry weight of broomrape and increased dry weight of stem and capitol and seed of sunflower. Jift had decreased stem number and dry weight of broomrape and decreased the dry weight of stem and capitol and seeds of sunflower. Urea decreased the height and fresh weight of broomrape in comparison with other kinds of fertilizers.