EFFECT OF AMMONIUM POLYPHOSPHATE APPLICATION ON NPK AVAILABILITY IN SOIL AND PLANT WHEAT GROWTH

Abstract

"Abstract: Phosphorus (P) represents the most deficient nutrient in agricultural soils after nitrogen affecting plant production. Therefore, a field experiment was conducted at the experimental farm, belongs to the College of Agriculture, University of Anbar in 2021 to compare the effect of ammonium polyphosphate (APP), monoammonium fertilizer (MAP) and diammonium fertilizer (DAP) on NPK availability in soil and plant wheat growth. Where three sources of Phosphorus were applied at three levels i.e. 0, 100, 150 kg P2O5Kg.h-1. The experiment was carried out according to a randomized complete block design with three replications. The results indicate the superiority of the APP fertilizer source over the two sources of MAP and DAP in its effect on the growth traits of wheat plant such as dry matter and plant height, where the highest rate for the previous mentioned traits were 3.45 g.Pot-1 and 106.48 cm, respectively, followed by MAP fertilizer, which gave 3.15 g.Pot-1 and 95.44 cm, respectively compared to DAP fertilizer that gave 3.09 g.Pot-1 and 84.12 cm, respectively. Increasing application of phosphorus levels caused significant differences in growth traits, namely dry matter and plant height in addition to the availability of NPK in the soil at 50% flowering stage and after harvesting. Significant interaction was observed between the source and the applied level of phosphorus in the soil and growth traits and the availability of NPK in the soil"