Masoomeh Amerian - Department of Horticultural Sciences and Engineering, Faculty of Agricultural Sciences and Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
Mahmud KhoramiVafa - Plant Production and Genetics Department, Faculty of Agriculture Science and Engineering, Razi University, Kermanshah, Iran
Amir Palangi - Department of Horticultural Sciences and Engineering, Faculty of Agricultural Sciences and Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
Gholamreza Gohari - Department of Horticultural Science, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
Georgia Ntatsi - Department of Crop Science, Laboratory of Vegetable Crops, Agricultural University of Athens

In order to evaluate the effect of different levels of nitrogen and selenium on the yield and nitrogen utilization efficiency, a factorial experiment was conducted based on a randomized complete block design with three replications at Razi University. In this experiment, the first factor included different levels of nitrogen including ۰, ۵۰, ۱۰۰ and ۱۵۰ kg ha-۱ and the second factor was selenium foliar spraying at three levels of ۰, ۵ and ۱۰ mg L-۱ of sodium selenate. Nitrogen, selenium and the interaction between two factors had a significant effect on the biological and economic yield of garlic. The interaction between nitrogen and selenium increased the harvest index of garlic. According to the obtained results, increasing the amount of nitrogen and selenium increased the yield and nitrogen utilization efficiency. The use of ۱۵۰ kg ha-۱ of nitrogen along with ۱۰ mg L-۱ of sodium selenate has caused garlic to have the highest nitrogen utilization efficiency in addition to its high ability to absorb nitrogen and produce maximum yield.

Economic yield, Harvest index, nitrogen productive efficiency, nitrogen uptake efficiency