In order to evaluate some growth and yield indicators of maize plant towards foliar spray by Nano NPK and Nno complete micro (NCM) fertilizers, and Nano amino acids (NAA). A field experiment was implemented in the summer season of 2019 according to the Randomized Complete Block Design (RCBD) with three replicates for each treatment. The experiment consisted of two factors; the first factor consisting of: control, Nano NPK (20-20-20) and NPK (12-12-36); while the second factor consisting of: control, NCM, NAA and NCM + NAA. The studied indicators on maize plant included chlorophyll content in leaves (SPAD unit), plant height (m), stem diameter (cm), biological yield (ton. h−1), grains yield (ton. h−1), harvest index (%). Results showed the significant superiority of Nano NPK (12-12-36) spray in achieving the highest means for all studied indicators. Spraying of NCM + NAA achieved the highest means for chlorophyll content in leaves, stem diameter, grains yield and harvest index. The interaction of the study factors gave by the combination of Nano NPK (12-12-36) with NCM + NAA, the highest means of chlorophyll content in leaves, plant height, stem diameter, grains yield and harvest index.
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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