INFLUENCE OF NITROGEN NUTRITION AND NITRIFICATION INHIBITOR ON THE YIELD OF CEREAL CROPS
Abstract
The article presents the results of experimental studies to determine the effect of using different rates of nitrogen fertilizers in the form of KAS-32 and the nitrification inhibitor 3,4-dimethylpyrazol phosphate on the yield of winter wheat, winter rape and corn. Field studies were conducted during 2018-2021 in the research department of Druzhba Nova LLC in Varvynskyi district of Chernihiv region (a branch of the Kernel agricultural holding). Analytical and mathematical-statistical methods were used to process the experimental data. The scheme of the one-factor field experiment included the use of variants with different norms of nitrogen fertilizers (N100, N120 and N130 ), as well as the use of the nitrification inhibitor 3,4-dimethylpyrazol phosphate when added to KAS-32. The control variant was conditionally without nitrogen fertilizers N10P30K40. The results of experimental studies have been proven. Thus, in winter wheat, on average, over the four years of research in 2019-2021, the yield increased from 3,74 t/ha in the control variant N10P30K40 to 6,27 t/ha and to 6,30 t/ha in the variants background + N100 + NI and background + N120 + NI and then slightly decreased in the experimental variant with the maximum rate of nitrogen fertilizers but without the use of NI (background + N120) to 5,85 t/ha. For winter rape, on average over the three years of research in 2018-2021, the yield also increased from 2.48 t/ha in the control variant N10P30K40 to 3,06 t/ha and 3,16 t/ha in the variants Background + N120 + NI and Background + N130 + NI and further slightly decreased to 2,79 t/ha in the variant with the maximum rate of nitrogen fertilizers but without the use of NI (Background + N130 ).
For maize, on average, over 4 years of research in 2019-2021, is fixed an increase in yield from 8,14 t/ha in the control variant N10P30K40 to 9,75 t/ha and to 9,52 t/ha in the variants Background + N120 + NI and Background + N130 + NI and a slight decrease in yield in the experimental variant with the maximum rate of nitrogen fertilizers, but without the use of NI (Background + N130 ) to 8,7 t/ha.
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