Energy productivity, fertilization rate and profitability of wheat production after various predecessors II.Profitability of wheat production

Abstract

In the course of our study on the adaptation of modern genotypes common winter wheat (Triticum aestivum) to the requirements of sustainable agriculture data were received concerning the influence of the predecessor and nitrogen fertilizer rate on energy efficiency and recyclable nitrogen fertilization and profitability of productivity.We share these data with the scientific community, as they are up-to-date and informative in both theoretical and practical aspects. The analyses are based on data from field experiments fertilizer derived after predecessor cereals-regular crop of sorghum, millet, maize and legumes after predecessor-separate sowing of chickpeas. Energy efficiency of nitrogen fertilization was calculated as the ratio between the energy supplied in the additional grain yield and energy input in the form of fertilizers. Refundable efficiency of nitrogen fertilization is the additional amount of nitrogen accumulated in the grain, with respect to the applied nitrogen fertilization. Economic profitability of production is evaluated by coefficient R = P/Ra (ratio of benefits/costs). The results show that energy efficiency and recyclable nitrogen fertilization are on average five times higher after cereal than after legumes predecessor, and decreased with increasing the fertilizer rate, the decrease was statistically significant only for the first item (exponent). Profitability ratio of production after the introduction of legumes predecessor in crop rotation increases by an average of 42% and retains maximum values of fertilization levels 0.06, 0.12 and 0.18 t/ha nitrogen. Profitability of wheat production using pre-legumes crop is not determined by the parameters nitrogen fertilizer rate and energy efficiency of nitrogen fertilization and refundable efficiency of nitrogen fertilization.

Energieeinsatz und Energieeffizienz von Winterweizen bei unterschiedlicher mineralischer Stickstoffdüngung im Marchfeld

“…Zahlreiche Untersuchungen (Hülsbergen et al, 2001;Hoeppner et al, 2005;Moitzi et al, 2015;Lin et al, 2017, Moitzi et al, 2019 zeigen, dass unter konventionellen Produktionsbedingungen beim indirekten Energieeinsatz der mineralische N-Dünger den größten Anteil am fossilen Energieeinsatz hat. Mit zunehmender mineralischer N-Düngung nimmt die Energieeffizienz in der Weizenproduktion ab (Uhr und Vasileva, 2016). Neben dem Niveau der mineralischen N-Düngung bestimmt auch die Art des N-Mineraldüngers den flächenbezogenen Energieeinsatz.…”