Effect of concentration and date of spraying with trace elements on growth and yield of cotton plant ( Gossypium hirsutum L.)

Abstract

Abstract This study was conducted in the fields of the Cotton Research Unit / Technical Agricultural College / Mosul, to study the effect of three concentrations of the trace element composition (0, 1.25, 2.5) ml / liter and three spraying dates (the vegetative growth stage, the flowering stage and the boll formation stage) on qualitative and quantitative characteristics of vegetative growth and yield of Lashata cultivar cotton plant. The seeds were sown at 15/4/2018 in mixed soil by adopting the design of complete random design. RCBD with three replicates and one experimental unit contained ten homogeneous plants. The results were analyzed and tested according to the Duncan polynomial test under the level of error probability of 5%. The results of this study showed a significant effect of the trace elements in most of the studied characteristics. Especially when adopting the spraying date in the vegetative growth stage as the vegetative growth characteristics increased (plant height, number of nodes until the first fruit branch, number of vegetative branches, number of fruiting branches) and quantity yield characteristics (number of bolls, weight of the existing boll, seed index, cotton yield Cast iron) and qualitative yield characteristics (staple index, percentage of hair, earliness percentage) and the interaction coefficients between spray concentrations and dates compared to control treatment.