Assessment Effect of Different level of Nitrogen Fertilizer (Urea Source) and Interval between Irrigation Round on Crop Production of Sorghum (Sorghum bicolor L., cv. Speed feed)

Subject Areas : Journal of Crop Nutrition Science

Bahareh Jahangiri ¹ , Mojtaba Alavifazel ² , Mohamad Reza Dadnia ³

1 - MSc. Graduated, Department of Agronomy, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran. |Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
2 - Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
3 - Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.

Received: 2019-09-24 Accepted : 2019-11-26 Published : 2019-12-30

Keywords: harvest index, Forage, <i>Dry matter, Seed weight</i>, Fresh yield,

Abstract :

BACKGROUND: Nutrients play a very important role in chemical, biochemical, physiological, metabolic, geochemical, biogeochemical, and enzymatic processes. Innovations for saving water in irrigated agriculture and thereby improving water use efficiency are of paramount importance in water-scarce regions. Conventional deficit irrigation is one approach that can reduce water use without causing significant yield reduction. OBJECTIVES: This study is aimed to examine the changes of crop production of sorghum in response to apply different interval irrigation round and urea fertilizer. METHODS: A farm research was arranged via split plot experiment based on the randomized complete block design with three replications in 2012. Main plots were included apply three levels of interval between irrigation (I1: 8 day; I2: 12 day; I3: 16 day) and the sub plots consisted three level of urea fertilizer (N1: 200, N2: 300, N3: 400 kg.ha-1). RESULT: According result of analysis of variance effect of different level of urea fertilizer, irrigation regime and interaction effect of treatments on all studied traits (instead harvest index) were significant. Evaluation mean comparison result of interaction effect of treatments on all measured traits revealed the highest amount of seed yield (817 gr.m-2), 1000-Seed weight (33.38 gr), Fresh forage yield (11829 gr.m-2) and total dry weight (3071 gr.m-2) were noted for 8 day interval between irrigation round and 400 kg.ha-1 urea fertilizer and lowest amount of mentioned traits belonged to 16 day interval between irrigation round and 200 kg.ha-1 urea fertilizer treatment. CONCLUSION: Finally according result of current research application 8 day interval between irrigation round and 400 kg.ha-1 urea fertilizer had the highest amount of studied traits and it can be advice to producers in studied region.

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