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Effects of Sowing Dates and Seeding Rates on Nitrogen and Water Use Efficiency of Facultative Wheat |
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| Authors: | Bulut Sancar Ça?lar Özcan Öztürk Ali |
| Institution: | 1.Safiye Cikrikcioglu Vocational School, Dept. of Plant and Animal Production, Kayseri University, Talas-Kayseri, Turkey ;2.Department of Organic Farming Business Management, School of Applied Sciences Igdir University, Igdir, Turkey ;3.Department of Field Crops, Faculty of Agriculture, Ataturk University, Erzurum, Turkey ; |
| Abstract: | In this study, effects of different sowing dates and seeding rates on N uptake efficiency (NUE), N translocation efficiency (NTE), agronomic efficiency (AE), physiological efficiency (PE), water use efficiency for grain yield (WUEg) and water use efficiency for biomass (WUEb) of facultative wheat were investigated. As the average of cropping year, sowing dates and seeding rates, N uptake efficiency (NUE), N translocation efficiency (NTE), agronomic efficiency (AE), physiological efficiency (PE), water use efficiency for grain yield (WUEg) and water use efficiency for biomass (WUEb) values were respectively obtained as 1.17?kg Nuptake/kg Napplied, 68.5%, 36.9?kg grain/kg Napplied, 31.2?kg grain/kg Nuptake, 5.19?kg ha?1 mm?1 and 18.04?kg ha?1 mm?1. Nitrogen and water use efficiencies decreased with delayed sowing dates and increased with increasing seeding rates. It is possible to maintain a high wheat yield, nitrogen and water use efficiency by increasing plant density through winter sowing. It was concluded based on present findings that sowing date and seeding rates had significant effects on nitrogen and water use efficiencies and winter sowing should be practiced as not to cause yield losses and high seeding rates (575 seeds m?2) yielded greater nitrogen-water use efficiencies. |
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