The use of fertilizer mixtures based on sewage sludge and zeolite in oilseed agrocenoses
D.V. Vinogradov, M.P. Makarova, T.V. Zubkova
The article presents the results of research devoted to the study of the effect of fertilizer mixtures based on sewage sludge and zeolite in agrocenoses of oil crops (spring rapeseed variety Ratnik and sunflower variety Poseidon 625). The use of fertilizer mixtures based on sewage sludge and zeolite has intensified the development of the leaf apparatus and generative organs. In spring rape agrocenoses, the number of pods per plant increased from 16.9 to 22.4 and the number of seeds from 196 to 326. In variants with fertilizer mixtures, the productivity of agrocenoses of spring rapeseed was 1.31–1.49 t/ha (plus 17.1–41.9% of the control).When using fertilizer mixtures in sunflower agrocenoses,
1194–1247 seeds were obtained from one basket, which is 17.6–22.9% more than in the control. The yield of oilseeds was 2.37–2.68 t/ha. The highest productivity of oilseeds was noted in the variant with the introduction of sewage sludge and zeolite in a ratio of 1 : 0.75. An important agroecological technique that reduces the negative impact of heavy metals contained in sewage sludge is the use of zeolite, a natural sorbent with a high cation exchange capacity. The use of fertilizer mixtures based on sewage sludge and zeolite led to a decrease in the accumulation of heavy metals in plant products. The total pollution factor decreased by 0.11–0.41 units in variants with spring rape, by 0.10–0.47 units in variants with sunflower. As a result of the studies, conclusions were drawn about the possibility of using fertilizer mixtures consisting of sewage sludge and zeolite in agrocenoses of oilseeds (spring rapeseed and sunflower), provided that the obtained seeds are used for technical purposes.
Keywords: spring rapeseed, sunflower, sewage sludge, zeolite
Article published in number 1 for 2023 DOI: 10.25750/1995-4301-2023-1-093-100