The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Year 2017, Volume 63 Issue 4 (15.12.2017)
| Year : | 2017 |
| Volume : | 63 |
| Issue : | 4 (15.12.2017) |
| Authors : | Galia PANAYOTOVA, Svetla KOSTADINOVA, Ivan MANOLOV |
| Title : | RESPONSE OF DURUM WHEAT TO NITROGEN FERTILIZATION RATES |
| Abstract : | The response of new Bulgarian durum wheat variety Predel to nitrogen fertilization was studied in a field fertilizing experiment with cotton – durum wheat crop rotation for the period 2008 – 2014, at the Institute of Field Crops – Chirpan, Bulgaria under rainy conditions. The studied nitrogen rates were 0; 60; 120 and 180 kg N.ha-1. The experimental design consisted of randomized block design with four replications. A tendency was found that nitrogen fertilization increased grain yield. The nitrogen rates N120 and N180 proved increased grain protein yield with 49.6 and 48.7 % compared to the control. The rate N180 decreased the harvest index. The highest agronomic efficiency of nitrogen for grain and grain protein were obtained with moderate rate N120 average for the period. Nitrogen fertilization decreased partially the factor of nitrogen productivity from 68 kg.kg-1 at rate N60 to 25 kg.kg-1 at rate N180. The highest concentration of grain protein - 15.97 % and vitreousness of the grain - 75.84 were obtained after applying N180. The content of wet and dry gluten slightly depended on nitrogen fertilization. A strong positive correlation was established between nitrogen fertilization and grain+straw yield (r=0.726**), grain protein concentration (r=0.862**), grain protein yield (r=0.635**) and vitreousness of the wheat grain (r=0.856**). |
| For citation : | Panayotova G., Kostadinova S., Manolov I. (2017): Response of durum wheat to nitrogen fertilization rates. Agriculture and Forestry, 63 (4): 113-120. DOI:10.17707/AgricultForest.63.4.13 |
| Keywords : | Nitrogen rates, Durum wheat, Grain quality, Efficiency |
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