Effect of climatic conditions and fertilization on grain quality of winter wheat (Triticum aestivum L.) | Vplyv klimatických podmienok a hnojenia na kvalitu zrna pšenice letnej f. ozimnej (Triticum aestivum L.)
2009
Užík, M., Centrum výskumu rastlinnej výroby, Piešťany (Slovak Republic) | Žofajová, A. | Ruckschloss, Ľ.
Winter wheat (var. Viginta) grain yield, protein content and wheat glutene (from NIRS analyses) were evaluated in a long-term stationary experiment in the Research-breeding Station Vigľaš-Pstruša. Twelve fertilization variants were applied with increasing nitrogen doses (0-40-80-120-150 kg per ha) combined with P and K fertilizers (60 kg P2O5 and 60 kg K2O) in four year-repeated experiment. The results showed that only P and K fertlization increased in grain yield by 16% as compared to control (unfertilized) variant. The highest grain yield was obtained at 80 kg N and 60 kg P2O5 (155.7%). Fertilization of above 80 kg N was less effective in sense of grain yield. The results indicate a necesssity to use different strategies for wheat mineral nutrition purposed for its both food and non-food cultivations. The wheat cultivation for its non-food purposes requires low N doses as well as low soil K supply to maintain low grain N content and with preferable P to K fertilization. The wheat cultivation for food purposes with minimum grain N (13.5%) and wet glutene (30%) contents requires at least 120 kg per ha or even higher N doses with its lower efficiences and favourization of K to P fertilization in accordance with their supply in soils.
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