Document Type : Research Paper

Authors

1 Associate Professor, Faculty of Agriculture, Specialty: Crop Physiology, Shahed University, Tehran. Iran

2 Department of Soil, Faculty of Agriculture, Shahed University, Tehran, Iran

3 Department of Agriculture, Faculty of Agriculture, Shahed University, Tehran, Iran

Abstract

In order to study the effect of nitrogen fertilizer treatments on yield traits, essence percentage and the amount of nitrogen in the stem and leaves Cumin under different irrigation regimens, an experiment was conducted as split plot based on randomized complete block design with three replications in the 2016-2017 crop season at the Research Field of Agriculture Faculty, Shahed University, Tehran, Iran. In this experiment, the main plot consisted of different irrigation regimes at three levels (no stress, mild stress or irrigation based on draining 40% of available water and severe stress or irrigation based on draining 80% of available water) and Subplot included four levels of nitrogen fertilizer treatments (100% and 50% fertilizer recommendation of nitrogen (urea), seed stained biofertilizer application (Nitroxin) and combination treatment biofertilizer and 50% fertilizer recommendation nitrogen. The results showed that increasing deficit irrigation at a mild level and more than that at a severe level, although increased the percentage of essence, but its negative effect on yield and yield components, total chlorophyll, shoot nitrogen concentration and essence yield was significant. Application of combination nitrogen fertilizer (urea + Nitroxin) while increasing the yield and yield components of Cumin, increased the percentage and yield of essence, and shoot nitrogen concentration and generally caused the most desirable quantitative and qualitative yield of Cumin.

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