دور حامضي الفولفك و الهيوميك و مستويات السماد الفوسفاتي في امتصاص الفسفور و حاصل الذرة الصفراء في تربة كلسية

Abstract EN

This study was conducted to compare the efficiency of fulvic (F) and humic (H) acids in orbing phosphorous during growth stages, as well as the yield of maize, both acids were added at levels of 20 and 40 kg.

ha-1 with three levels of phosphorus of 0, 50 and 100 kg.

P.

ha-1 in the form of a triple superphosphate fertilizer Ca(H2PO4)2.

The results showed the superiority of fulvic acid over humic acid in the amount of phosphorous orbed by the plant, at a rate of 47.46, 163.08, 62.60, 55.83 and 82.75% , during the growth stages 20, 40, 60, 80 and 100 days, respectively, and the superiority of fulvic acid over Humic acid.

in the amount of yield and weight of 500 grains and biological yield at a percentage 18.33, 18.26 and 6.88% respectively.

As for the effect of levels phosphate fertilizer added, the results showed a significant superiority in the concentration of phosphorous orbed by the plant during the stages of plant growth, as the percentage increased 157.

28, 163.70, 99.46, 100.51 and 105.26% for the 100 level compared to the 0 level and for the five periods of time respectively.

The levels of the added fertilizer also affected the weight of the yield, the weight of 500 grains, and the biological yield, with a percentage of 62.71, 17.42 and 7.82% , respectively, when comparing level 100Kg P ha-1 with level 0 of the addition.