Effect of DAP Fertilizer Source and Nano Fertilizers (Silicon and Complete) Spray on Some Growth and Yield Indicators of Rice (Oryza sativa L. cv. Anber 33)

Abstract

Abstract In order to evaluate some growth and yield indicators of rice (cv. Anber 33) towards the various fertilizer treatments (DAP fertilizers and Nano fertilizers), a field experiment was implemented in the summer season of 2019 in one of the rice fields of Ghamas district/Al-Diwaniyah Governorate located between the points (3509948. 464130) – East and (3509938. 464132) – North, with the total area of 435 m2. The experiment consisting of two factors was designed according to the Randomized Complete Block Design (RCBD) with three replicates for each treatment, as the first factor represented by DAP fertilizer source consisted of four treatments (Control, M-DAP, O-DAP + micronutrients and O-DAP high K), while the second factor consisting of spraying Nano fertilizers consisted of four treatments (Control, Nano silicon, Nano complete and Nano silicon + Nano complete). The studied indicators on the rice plant included chlorophyll content in leaves (SPAD unit), plant height (cm), biological yield (ton h−1), grains yield (ton h−1), harvest index (%), fertilization efficiency for production (%). Results showed the superiority of O-DAP + micronutrients fertilizer in achieving the highest chlorophyll content in leaves, biological yield, grains yield and fertilization efficiency for production compared with M-DAP fertilizer which achieved the highest mean of plant height, as well as O-DAP high K fertilizer which achieved the highest mean of harvest index. Also, spraying with Nano fertilizer habits with significant results on the studied indicators, especially with the treatment Nano (silicon + complete) that achieved the highest means for the majority of the studied indicators, and that their interaction between O-DAP + micronutrients fertilizer with Nano (silicon + complete) fertilizers achieved the highest meanes for the most important characteristics of the crop represented by the chlorophyll content in leaves, grains yield, fertilization efficiency for production.