The Use of Products from Leonardite to Improve Soil Quality in Condition of Climate Change


Authors: Dorota Pikuła

Volume/Issue: Volume 27: Issue 1

Published online: 23 Apr 2024

Pages: 15 - 22



The principle of sustainable fertilisation in modern agriculture, which ensures that the soil is maintained in a fertile state requires the search for alternatives to manure fertilisation for products based on humic substances to increase the organic matter content of soils.The advantage of leonardite over conventional natural and organic fertilisers is mainly due to its high content of organic matter and humic substances (humic and fulvic acids). Leonardite, due to the presence of humic acids in it, can be suitable for soil amendment and yield of barley. In the conducted studies, the yield increase after adding Rosahumus fertilizer to the soil at a rate of 6 kg.ha−1 + NPK (Nitrogen, Phosphorus, Potasssium) was found to be 11% compared to the control (NPK).There were no changes in the Corg. content of the soil as a result of the application of Rosahumus fertilizer with NPK. The fertilizer only slightly modified the fractional composition of humus. In the future, we should expect an increase in the use of leonardite-derived humic substances in fertilizers and soil conditioners to stabilize soil organic matter.

Keywords: soil organic carbon, soil fertility, humic acids, fulvic acids, humins



Akinremi, O. O., Janzen, H. H., Lemke, R. L., & Larney, F. J. (2000). Response of canola, wheat and green beans to leonardite additions. Canadian Journal of Soil Science, 80, 437–443.

Akimbekov, N., Qiao, X., Digel, I., Abdieva, G., Ualieva, P., & Zhubanova, A. (2020). The Effect of leonardite-derived amendments on soil microbiome structure and potato yield. Agriculture, 10(5),147.

Climate change threatens EU agriculture. (2019). (date of access: 4.09.2019).

Dong, L., Córdova-Kreylos, A. L., Yang, J., Yuan, H., & Scow, K. M. (2009). Humic acids buffer the effects of urea on soil ammonia oxidizers and potential nitrification. Soil Biology and Biochemistry, 41, 1612–1621.

Klimada. (2019). Consequences of climate change. Agriculture‘s climate change adaptation policy to 2070. retrieved from: and: (accessed 5.02.2020)

Kocoń, A. (2013). Crop aids, soil conditioners – microbial preparations. Training Materials Postgraduate Studies. Integrated Crop Production, Pulawy, VIII (pp, 95–99).

Kocoń, A., & Jadczyszyn, T. (2015). Influence of microbial preparations, methods of their application and nitrogen fertilisation doses on the content of assimilable phosphorus in soil and other selected chemical indices of soil fertility. Polish Journal of Agronomy, 21, 11–18.

Łabędzki, J. (2009). Projected climate change and irrigation development in Poland. Polish Academy of Science.

IUSS Working Group (WRB). (2015). World reference base for soil resources 2014, update 2015. International soil classification system for naming soils and creating legends for soil maps (World Soil Resources Reports No. 106). FAO.

Qian, S., Ding, W., Li, Y., Liu, G., Sun, J., & Ding, Q. (2015). Characterization of humic acids derived from leonardite using a solid-state NMR spectroscopy and effects of humic acids on growth and nutrient uptake of snap bean. Chemical Speciation and Bioavailability, 27, 156–161.

Pikuła, D. (2016). The role of humic substances and innovative products to increase their content in soil. Studies & Reports of IUNG-PIB, 48(2), 81–93.

Pikuła, D. (2022). Humic substances for the benefit of man and the environment. In 6th National Scientific Conference. Life sciences for man and the environment, 2022. Interdisciplinarity as a key to development (pp.12–13). Institute of Soil Science and Plant Cultivation, Puławy.

Pikuła, D., & Ciotucha, O. (2022). The composition of the organic matter fractions of loamy sand after long-term FYM application without liming. Agronomy, 12, 2385.

Puglisi, E., Fragoulis, G., Ricciuti, P., Cappa, F., Spaccini, R., Piccolo, A., Trevisan, M., & Crecchio, C. (2009). Effects of a humic acid and its size-fractions on the bacterial community of soil rhizosphere under maize (Zea mays L.). Chemosphere, 77, 829–837.

Rogala, B. (2020). Is the farmers who should care most about climate protection, because they will be most affected by the changes – interview with Dr Zbigniew Karachun. Downloaded from: (date of access: 14.02.2020).

Rutkowska, A. (2016). Biostimulants in modern plant breeding. Studies & Reports of IUNG-PIB, 48(2), 65–80.

Rzekanowski, C. (2000). Prospects for plant irrigation in view of the upcoming changes in Polish agriculture. Ecology and Technology, 8(3), 83–91.

Sharif, M., Khattak, R. A., & Sarir, M. S. (2002). Effect of different levels of lignitic coal derived humic acid on growth of maize plants. Communications in Soil Science and Plant Analysis, 33, 3567–3580.

Soil Conservation. (2021). European Parliament resolution of 28 April 2021 on soil protection (2021/2548(RSP)). Texts adopted – Soil protection – Wednesday 28 April 2021 (

Spigarelli, S. A. (1992). Stimulation of anion root growth by peat humic substances. Effects of extraction, temperature and pH. In 6th Meeting IHSS (p. 79), Monopoli.

Turgay, O. C., Erdogan, E. E., & Karaca, A. (2010). Effect of humic deposit (leonardite) on degradation of semi-volatile and heavy hydrocarbons and soil quality in crude-oil-contaminated soil. Environmental Monitoring and Assessment, 170, 45–58.

Ulukan, H. (2008). Effect of soil applied humic acid at different sowing times on some yield components of wheat (Triticum spp.) hybrids. International Journal of Botany Studies, 4(2), 164–175.

WRB (World reference base for soil resources). (2022). International soil classification system for naming soils and creating leg-ends for soil maps. 4th ed.