The effect of concentration and date of application of potassium organic fertilizer (Powhumus) on growth and yield of cotton (Gossypium hirsutum L.)

Abstract

The research was carried out in the field of the Cotton Research Unit at the College of Agricultural Technology / Mosul during the spring season 2018, to study the effect of four concentrations of potassium organic fertilizer (Powhumus) (0, 0.3, 0.6 and 0.9 g / l) and three spraying dates (the vegetative growth phase) The flowering stage, and the nut formation stage) in the vegetative growth characteristics and the quantitative and qualitative yield of the cotton plant variety (Lashata), the seeds were sown on 16/4/2018 in mixed soil by adopting the RCBD design with three replications and one experimental unit contained ten homogeneous plants. Analyzing the results and testing them according to the Duncan polynomial test under the 5% error probability level. The results of the study showed a significant effect of potassium organic fertilizer (Powhumus) on most of the studied traits. Vegetative), as the vegetative growth characteristics increased significantly (plant height, number of nodes until the first fruit branch, number of vegetative branches, number of fruiting branches) and quantity yield characteristics (number of blooming nuts / plant, weight of walnuts) One (g), seed index, cotton yield) and yield characteristics (staple length, softness, toughness) compared to control treatment.