Effect of time of nitrogen application on chemical composition of wheat grain grown under different soil conditions
2001
Tosheva, E. (Institut po Pochvoznanie "N. Pushkarov", Sofia (Bulgaria))
The experiment was carried out with Sadovo 1 wheat variety at two rates: 13.5 and 18 kg/da N, on an appropriate phosphorus-potassium background. The application of ammonium nitrate was: single in autumn, single in spring, double (1/3 rate before sowing and 2/3 rate in spring supplied as dressing/ and split up to test the stage of ear-formation. There were significant differences on chemical composition of the grain under the influence of the rates and time of nitrogen application. The content of nitrogen and protein arises with the increasing of nitrogen rates and the application of a part of nitrogen rate during the period from stalk-shooting to earing. The lizine content decreases with about 10% together with the protein increasing.
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