Goal. Study of the influence of different rates of fertilization of agricultural crops in short-rotational crop rotation on the quality of agricultural products and their yield on radioactively contaminated lands.
Methods. Scientifically recommended agricultural crops for this region were selected for research in grain-row crop rotation: Oats — variety Chernihivskyi 27; Triticale — Aist Kharkiv variety; Corn — variety Kharkivska 195 MV; Fodder beets — Eckendorf yellow variety; Lupine is an Industrial variety. The chemical composition of feed was determined according to generally accepted methods. In plant products, the following were determined: crude protein — by total nitrogen using the classic Kjeldahl method; raw fiber — by acid-alkaline hydrolysis; raw ash — by burning samples in a muffle furnace at a temperature of 500—600°C; raw fat — by the Ruzhkosky method in a Soxhlet apparatus.
Results. As a result of research in 2015—2017, it was established that the studied agricultural products in 2, 3 versions of fertilizer have a higher content of crude protein, crude fat, and crude fiber. The content of crude protein in lupine seeds was in the range of 25.54—31.01%, in oat grain — 10.37—12.21%, in triticale grain — 10.08—12.25%, in corn grain — 9.40—11.78%, in fodder beets — 2.03—2.65%. The raw ash content varied over the years of research from 2.68 to 2.86% in oat grain; from 2.74 to 3.01% in lupine seeds; from 2.19 to 2.41% in triticale grain; from 1.37 to 1.68% in beets and from 1.57 to 1.72% in corn grains. The crude fat content for the studied period was from 3.72 to 3.97% in oat grains; from 4.46 to 5.55% in lupine seeds; from 1.40 to 1.74% in triticale grain; from 0.12 to 0.16% in fodder beet and from 4.40 to 4.81% in corn grain. The content of crude fiber during the years of research was from 10.21 to 10.60% in oat grain; from 13.29 to 14.38% in lupine seeds; from 1.69 to 2.74% in triticale grain; from 0.93 to 1.05% in fodder beets and from 2.20 to 2.75% in corn grain. The average yield of oats over the years of research on fertilizer options was 27.12—35.01 t/ha, while it is monitored increase in yield by fertilizer options compared to the control by 15—46%. The yield of triticale was in the range of 39.75—48.97 t/ha, subject to an increase in yield in 2 and 3 fertilizer options by 3—7%. The yield of lupine over the years of research was 17.80—26.69 c/ha, while the yield of lupine in 2 and 3 fertilizer options was 4.8—17.2 higher than in the control. The grain yield of corn and fodder beet in 2 and 3 fertilizer variants also exceeded the control index. The yield of fodder beet was 297.09—394.74 t/ha. The yield of corn was in the range of 48.85—87.15 c/ha.
Conclusions. It was established that the studied agricultural products in 2, 3 versions of fertilizer have a higher content of crude protein, crude fat, and crude fiber. The average yield of oats over the years of research on fertilizer options was 27.12—35.01 t/ha, the yield of triticale was in the range of 39.75—48.97 t/ha, the yield of lupine over the years of research was 17.80—26.69 t/ha, fodder beet yield was 297.09—394.74 t/ha, and corn yield was 48.85—87.15 t/ha.
