Evaluation Impact of Amount and Distribution of Nitrogen Fertilizer on Barley Crop Production and Qualitative Characteristics

Nitrogen is one of the most significant influencing elements that help the atmosphere function better both quantitatively and qualitatively. Balanced and efficient use of applied nitrogen is of paramount importance in the overall nutrient management system than any other plant nutrient in order to reduce its negative impact on the environment.
A study was conducted in Weis city, located in the southwest of Iran, to examine the effect of pure nitrogen from urea (46% nitrogen) on grain yield and qualitative traits of experimental barley.
A split plot randomized full-block design was used to conduct the experiment over four replications. The main plot contained 50, 90, and 130 kg of nitrogen concentrations per hectare. In the sub-plot, nitrogen was distributed as follows: 50% during the planting stage and 50% during the shooting stage, 25% during the pregnancy stage, and 75% during the planting stage and shoot stage.
The results demonstrated a substantial interaction between nitrogen distribution technique and amount on seed yield, biological yield, harvest index, spike length, plant height, seed protein percentage, and seed protein yield. As a result of raising nitrogen fertilizer application to 130 kg per hectare, barley plants produced more seed (517 grams per square meter) and seed protein (71.65 grams per square meter), according to the study's results.
Based on the overall findings of this study, it can be concluded that barley plants should be grown with a nitrogen fertilizer consumption of 130 kg per hectare using a method that divides the planting stage by 25% and the stage of stem growth by 75% in order to produce the highest possible quantitative and qualitative yield.