Effect of Spray with Nano NPK, Complete Micro Fertilizers and Nano Amino Acids on Some Growth and Yield Indicators of Maize (Zea mays L.)

Abstract

Abstract 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.