N. P. Masyutenko, A. V. Kuznetsov, M. N. Masyutenko, T. I. Pankova, M. A. Priputneva
Federal Agricultural Kursk Research Center, ul. Karla Marksa, 70b, Kursk, 305021, Russian Federation
Abstract. The research aimed to study the effect of agricultural biotechnologies with the use of biological preparations on the reserves, quantitative, qualitative, and component composition of the organic matter in typical chernozem weakly eroded in a grain-row crop rotation. The work was performed in 2018–2020 in the Kursk region. The experimental design included the following treatments: crushed by-products of the forecrop (control); crushed by-products + nitrogen (at the rate of 10 kg of the active substance per 1 ton of by-products); crushed by-products + biological products (treatment with Gribofit and Imunazot of crushed by-products at the doses of 5 L/ha and 3 L/ha, respectively, as well as pre-sowing treatment of soil at the doses of 3 L/ha and 2 L/ha, respectively); crushed by-products + biological products + nitrogen. In the options of using biological products separately or in combination with nitrogen, the carbon stock of humus significantly increased in the 0–20 cm soil layer – by 0.73 t/ha and 0.91 t/ha, respectively. In the control and when applying crushed plant residues with nitrogen, it was insignificant (0.39 t/ha and 0.53 t/ha, respectively). Using biological products resulted in soil carbon sequestration. In these options, the carbon stocks of non-humified organic matter in the soil were higher than in the control and generally did not differ significantly from those when using nitrogen. The greatest increase in carbon stocks of mobile humic substances was noted against the background of biological products – by 0.57 t/ha and 0.68 t/ha versus 0.18 t/ha in the control. In the options of using biological products separately or in combination with nitrogen, we registered a significant improvement in the quality of mobile humic substances and an increase in the carbon reserves of microbial biomass. Biological products increased the proportion of mobile humic substances, mobile humic acids, mobile fulvic acids, and microbial biomass.
Keywords: typical weakly eroded chernozem; agrobiotechnology; by-products; nitrogen mineral fertilizers; humus; organic carbon; soil carbon sequestration; mobile humic substances; humic acids; fulvic acids; microbial biomass; non-humified organic matter.
Author Details: N. P. Masyutenko, D. Sc. (Agr.), chief research fellow, deputy director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); A. V. Kuznetsov, Cand. Sc. (Agr.), senior research fellow; M. N. Masyutenko, Cand. Sc. (Agr.), senior research fellow; T. I. Pankova, Cand. Sc. (Biol.), research fellow; M. A. Priputneva, junior research fellow.
For citation: Masyutenko NP, Kuznetsov AV, Masyutenko MN, et al. [Influence of agricultural biotechnologies on the reserves and composition of organic matter in typical weakly eroded chernozem]. Dostizheniya nauki i tekhniki APK. 2021;35(10):45-50. Russian. doi: 10.53859/02352451_2021_35_10_45.