Yield and Nitrogen Status of Maize (Zea mays L.) Fertilized with Solution of Urea—Ammonium Nitrate Enriched with P, Mg or S

UAN is a popular nitrogen fertilizer, broadly used in world agriculture. Research concerning the effects of this fertilizer is just as common. Contrarily, studies on the combined application of UAN with P, Mg or S are lacking. This fact has stimulated our study, undertaken in order to evaluate the e...

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Published in:Agronomy (Basel) 2022-09, Vol.12 (9), p.2099
Main Authors: Wierzbowska, Jadwiga, Sienkiewicz, Stanisław, Światły, Arkadiusz
Format: Article
Language:English
Subjects:
Agricultural production
Agricultural research
Ammonium
Ammonium nitrate
Computational efficiency
Computing time
Corn
Crop yield
Crops
Efficiency
Experiments
Fertilization
Fertilizers
Grain
Indicators
maize yield
Mathematical analysis
Mineral fertilizers
Nitrogen
Nitrogen balance
nitrogen management indicators
Nitrogen metabolism
P K
Phosphorus
Phosphorus pentoxide
Plant growth
Productivity
Sulfur
UAN
Urea
Weather
Wheat
Zea mays
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Summary:UAN is a popular nitrogen fertilizer, broadly used in world agriculture. Research concerning the effects of this fertilizer is just as common. Contrarily, studies on the combined application of UAN with P, Mg or S are lacking. This fact has stimulated our study, undertaken in order to evaluate the effects of maize grown for grain and fertilized with UAN enriched with the macronutrients (P, Mg and S) on the crop’s yields and nitrogen metabolism. The following nitrogen fertilizers were applied: UAN 32%N, UAN + S—26% N + 3% S, UAN + P (Medium)—26% N and 11% P2O5, UAN + P (Starter)—21% N and 18% P2O5, UAN + Mg—20% N + 4% Mg. Based on the results of chemical analyses and yields of maize, the following indicators of nitrogen use efficiency (NUE) were calculated: agricultural efficiency (AE), physiological efficiency (PE), internal N utilization efficiency (IE), reciprocal internal N utilization efficiency (RIE), grain share in N accumulation (HIN), recovery of N from mineral fertilizers (RN) and partial nitrogen balance (PNB). The highest grain yields were harvested after the application of UAN + S/UAN + Mg, and after the pre-sowing and top-dressing application of UAN or UAN + P (Medium). Values of all calculated nitrogen use efficiency indicators were more strongly dependent on the weather conditions, which determined volumes of maize yields in a given year, than on the applied fertilization.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy12092099