The Size of the Nmin Soil Pool As a Factor Impacting Nitrogen Utilization Efficiency in Maize (Zea mays L.). | [Pakistan Journal of Botany • 2018]

Author(s):

1. PIOTR SZULC: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

2. HUBERT WALIGÓRA: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

3. TADEUSZ MICHALSKI: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

4. JAN BOCIANOWSKI: Department of Mathematical and Statistical Methods, Poznań University of Life Sciences,Wojska Polskiego 28, 60-637 Poznań,Poland

5. MAGDALENA RYBUS-ZAJAC: Department of Plant Physiology, Poznań University of Life Sciences,Wołyńska 35, 60-637 Poznań, Poland

6. WIOLETTA WILCZEWSKA: Department of Agronomy, Poznań University of Life Sciences,Dojazd 11, 60-632 Poznań,Poland

Abstract:

The article presents the results of 3-year field tests aimed at evaluating the effect of the nitrogen dose balance based on the Nmin content. Nmin was evaluated in the context of the distribution in the soil profile and the effect of the type of nitrogen fertilizer on production efficiency indicators and the use of nitrogen in maize grain. In order to verify the assumptions, we determined the amount of nitrogen collected with grain yield, Nmin percentage in total nitrogen uptake with grain yield, agricultural and physiological efficiency and utilization of nitrogen and nitrogen Nmin content in the autumn after maize harvest. It has been shown that developing maize accumulates mineral nitrogen (Nmin) present in the soil in the rooting zone, especially during dry years. Incorporating nitrogen dose in the algorithm of the soil component pool significantly improves the performance indicators of the component application. It is possible for a fertilizer to exceed 100% of nitrogen utilization when nitrogen contained in the whole profile of maize rooting in the N pool is included. A significant increase in nitrogen accumulation in maize grain in the sulfur variant indicates that this element is a factor limiting the use of maize production potential in the test plot. Including the use of nitrogen-sulfur (N+S) fertilizer in maize and balancing the N dose based on Nmin reduces nitrogen eutrophication of the environment.

Page(s): 189-198

DOI: DOI not available

Published: Journal: Pakistan Journal of Botany, Volume: 50, Issue: 1, Year: 2018

Keywords:

nitrogen , nitrogen fertilizers , Nitrogen fertilizer efficiency , Zea mays L , residual nitrogen Nres

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