EFFECT OF ORGANIC FERTILIZATION, PHOSPHATE FERTILIZER SOURCES AND IRRIGATION WATER QUANTITY IN CONCENTRATION OF CORN Zea mays L. FROM NITROGEN AND POTASSIUM

Abstract

To study the effect of the use of organic fertilizer and several sources of fertilizer phosphate and different amounts of irrigation water in the plant concentration of Nitrogen and Potassium. Field experiment was carried out in the fields of the Agriculture College - the University of Baghdad. Abu-Ghraib region. at the agricultural season of 2012 using Split Split Plot Design, by using three levels of amounts of irrigation water is 60% and 80% and 100% of the total water requirement for the season, which amounted quantities 405 and 540 and 675 mm, respectively. Two levels of organic fertilizer plant Humo-Bacter A two levels zero and 1.5 Mg h-1 and three sources of phosphate fertilizer (triple super phosphate TSP, di-ammonium phosphate DAP, urea phosphate UP) level of 100 kg ha-1 in three replicates. The results showed no significant differences in Nitrogen concentration in the dry matter and grain at harvest stage in irrigation water amounts (w) of the total water requirement while there were significant differences in potassium concentration in dry matter and grain. Showed results of the experiment the effect of the sources of phosphorus significantly increase the nitrogen and potassium concentration in dry matter and grain in stages of plant growth. the source urea phosphate UP has significantly effect on other sources of phosphorus in increased concentrations of Nitrogen in each of the dry matter and grains, reaching 1.73 % 0 1.99 % respectively, an increase of 46.80% and 7.56%, respectively, compared to the treatment comparison P0 and potassium were 20.19% and 27.77%, respectively.