The efficiency of nitrogen stabilizer at different soil temperatures on the physiological development and productivity of maize (Zea mays L.)
Laen...
Kuupäev
2021
Kättesaadav alates
Autorid
Rácz, D.
Gila, B.
Horváth, É.
Illés, Á.
Széles, A.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Nitrogen (N) stabilizer containing nitrapyrin inhibitor is responsible for slowing the
activity of Nitrosomonas sp. bacteria down which oxidize ammonium to nitrite ions, thus, N-loss
resulting from nitrate leaching can be reduced. Although prior studies have shown its
effectiveness in the pre-sowing application in maize, considering that it disturbs the activity of
Nitrosomonas bacteria which is the most intense between 25 °C and 30 °C, soil temperature may
significantly influence the efficiency of nitrapyrin. Besides, nitrapyrin aims to enhance N-use
efficiency in high N-demanding plants, such as maize, which demands N at the most during stalk
elongation, which lays down the reason for its subsequent application. This study focuses on the
efficiency of nitrapyrin at different soil temperatures and its impacts on the physiological
development and productivity of maize. In a laboratory test, 10 °C, 15 °C, 20 °C, and 25 °C
temperature soils were treated with nitrapyrin and change of nitrate content was monitored to
observe the nitrification dynamic. Results show that as the soil temperature elevated, the
inhibition efficiency increased. In a field experiment with maize, nitrapyrin was applied in 13 °C
and 25 °C temperature soil. Results suggest the later treatment enhanced N-use efficiency, as,
during the high N-demanding growth stage, more N-forms were available in the soil. This resulted
in significantly higher relative chlorophyll concentration in the leaves and laboratory leaf analysis
confirmed the prevention of N deficiency. Results of further measurements on parameters
indicating biomass production such as root mass, stalk diameter, ear size, 1,000-kernel weight
indicate that the nitrapyrin application should be timed later.
Kirjeldus
Received: January 29th, 2021 ; Accepted: October 8th, 2021 ; Published: October 20th, 2021 ; Correspondence: racz.dalma@agr.unideb.hu
Märksõnad
corn, nitrapyrin, nitrification inhibitor, nitrogen use, Nitrosomonas, articles