Abstract
In order to study the effect of foliar application of nano-NPK, nano-micronutrients, and nano-amino acids on the growth and yield of maize (Hybrid F1 Furat), a field experiment was carried out during the autumn season (2019) with an area of 1500 m2g within the district of (41)–Al-Husseiniyah / Al-Talea’a district / Babylon Governorate according to Randomized Complete Block Design (RCBD) for two factors with three replicates. The first factor (nano-NPK) included three treatments: control, nano-NPK (20-20-20), and nano-NPK (12-12-36), while the second factor (nano-micronutrients and nano-amino acids) included four treatments: control, nano-micronutrients, nano-amino acids, nano-micronutrients + nano-amino acids. The studied indicators on maize plant included estimation of nutrient absorption in grains and total absorption (kg H-1), estimation of fertilizer application efficiency (%). The results showed the significant superiority of NPK (12-12-36) spraying in achieving the highest averages of the studied indicators by an increase of (61.53%) in comparison with the comparison treatment for the total absorbed potassium, and an increase of iron and copper absorbed in the grains reached (3.938% and 22.321%), respectively, in comparison with the comparison treatment. And the application of the integrated nano-element fertilizer + nano amino acids achieved The highest averages of iron, manganese and copper absorbed in grains increased by (39.010%, 28.409%, 60.577%), respectively, comparing with the comparison treatment. and the interaction of the two study factors gave the combination of nano NPK (20-20-20) with integrated nano micro elements + nano amino acids the highest averages of nitrogen and phosphorus total absorption and for iron, manganese and copper with an increase of (110.06%, 81.83%, 64.251%)., 74.065%, 109.375%), respectively, by comparison with the comparison treatment. The highest nitrogen and phosphorous utilization efficiency was recorded at 55.12 and 36.65%, respectively, in comparison with high-potassium nano NPK, which corresponds to the combination of high-potassium NPK nano with nano (trace elements + amino acids) in recording the highest potassium utilization efficiency of 58.51% in comparison with the balanced nano NPK.
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