Yield of spring wheat depending on the level of mineral nutrition and the use of biologically active substances under condition grown of Afghanistan

¹ Department of agronomy, Alberoni University, Kapisa Province, Afghanistan
² Institute of agrobiotechnology, Russian State Agrarian University - Moscow Timiryazev Agricultural Academy, Moscow, Russia

^* Corresponding author: f.jahish@gmail.com

Abstract

A field experiments was carried out at the experimental farm department of Agronomy, Agriculture faculty, Al-beruni University, Kapisa, Afghanistan, to study the effect of NPK and gibberellic acid on growth and yield of spring wheat during March-June 2022 and 2023. The experiment was arranged on randomized complete block design, with three replication. Treatments include: T₁ - N₀P₀K₀ (Control), T₂ – N₁P₁K₁ (120–60-30 kg/ha), T₃ – N₂P₂K₂ (160–90-60 kg/ha),T₄ – N₃P₃K₃ (200–120-90 kg/ha), T₅ – N₁P₁K₁ (120–60-30 kg/ha) + GA₃ 200 ppm, T₆ – N₂P₂K₂ (160–90-60 kg/ha), + GA₃ 200 ppm, T₇ – N₃P₃K₃ (200–120-90 kg/ha) + GA₃ 200 ppm. In case of mineral fertilizers and gibberellic acid, results indicated that NPK levels and GA₃ with a few exceptions remarkably improved the yields attributes and yields of spring wheat. The highest 1000 grain weight (46.98 and 47.18 gr), grain yield (4.16 and 4.63 t/ha) and straw yield of spring (8.48 and 8.55 t/ha) wheat was recorded with application of 160–90-60 Kg/ha NPK + 200 ppm GA₃ in both years of 2022 and 2023. While the minimum was found in control treatment.