Effects of Nitrogen Doses on Grain Yield and Quality of Buckwheat (Fagopyrum esculentum Moench)

The research was carried out to determination the suitable nitrogen doses (nonfertilizer: 0 and as pure: 15, 30, 45, 60 and 75 kg ha^-1) and investigate the effects of nitrogen on yield and quality of buckwheat in isparta during 2014. the longest plant height (77.0 cm), the highest grain yield (1254 kg ha^-1) and biological yield (4313 kg ha^-1) of buckwheat were obtained from 75 kg ha^-1 n doses, while the highest 1000 grain weight (24.2 g), agronomic efficiency (11.91), recycling efficiency (67.74) and utilizing efficiency (50.58) from 60 kg ha^-1 n doses. the highest physiological efficiency (0.76) was determined in 45 kg ha^-1 n dose and the highest agro-physiological efficiency (0.26) from 15 kg ha^-1 n dose. mineral nutrient content of buckwheat was increased depending on increasing n doses, and the highest n (1.95%), p (0.216%), k (0.243%), mg (0.131%), cu (4.53 ppm), zn (18.59 ppm), fe (3.7 ppm) and mn contents (3.00 ppm) were determined by 75 kg ha^-1 n treatment. 60 and 75 kg ha^-1 n doses were statistically the same significance in point of mineral nutrient content (expect for fe) of buckwheat.