Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen
Microbially mediated soil organic matter is an extremely sensitive pool that indicates subtle changes in the quality parameters responsible for the soil’s ecological and productive functions. Fifty years of mineral fertilization of a wheat-corn cropping system has a strong impact on soil quality par...
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| Format: | Article |
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MDPI AG
2021-10-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/10/2026 |
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| author | Nikola Koković Elmira Saljnikov Frank Eulenstein Dragan Čakmak Aneta Buntić Biljana Sikirić Vladan Ugrenović |
| author_facet | Nikola Koković Elmira Saljnikov Frank Eulenstein Dragan Čakmak Aneta Buntić Biljana Sikirić Vladan Ugrenović |
| author_sort | Nikola Koković |
| collection | DOAJ |
| description | Microbially mediated soil organic matter is an extremely sensitive pool that indicates subtle changes in the quality parameters responsible for the soil’s ecological and productive functions. Fifty years of mineral fertilization of a wheat-corn cropping system has a strong impact on soil quality parameters. The goal of the research was to study the dynamics and quality of soil biological parameters affected by increasing amounts of mineral nitrogen. Soil respiration, potentially mineralizable C and N, microbial biomass C and N and light-fraction OM on Cambisol were analyzed in the following treatments: (1) Control (without fertilization); (2) NPK (60/51/67); (3) NPK (90/51/67); (4) NPK (120/51/67); (5) NPK (150/51/67 kg ha<sup>−1</sup>). The parameters studied were significantly affected by the long-term application of mineral fertilizer compared with both the control and the adjacent native soil. The highest amounts of nitrogen (N150) did not significantly differ from N120 and N90 for most of the parameters studied. Potentially mineralizable C represented the largest labile carbon pool, while microbial biomass N was the largest labile nitrogen pool. The mineralization rates for C and N were oppositely distributed over the seasons. The sensitivity index correlated with the amount of light-fraction OM. The results give a deeper insight into the behavior and distribution of different pools of labile SOM in the agro-landscapes and can serve as a reliable basis for further research focused on zero soil degradation. |
| first_indexed | 2024-03-10T06:47:30Z |
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| id | doaj.art-a1eab938e5a44a68a139a995af17a5bc |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T06:47:30Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-a1eab938e5a44a68a139a995af17a5bc2023-11-22T17:07:05ZengMDPI AGAgronomy2073-43952021-10-011110202610.3390/agronomy11102026Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of NitrogenNikola Koković0Elmira Saljnikov1Frank Eulenstein2Dragan Čakmak3Aneta Buntić4Biljana Sikirić5Vladan Ugrenović6Institute of Soil Science, Teodora Drajzera 7, 11000 Belgrade, SerbiaInstitute of Soil Science, Teodora Drajzera 7, 11000 Belgrade, SerbiaMitscherlich Academy for Soil Fertility (MITAK), GmbH, Prof.-Mitscherlich-Allee 1, 14641 Paulinenaue, GermanyDepartment of Ecology, “Siniša Stanković” Institute for Biological Research–National Institute of the Republic of Serbia, University of Belgrade, Bulevar despota Stefana 142, 11060 Belgrade, SerbiaInstitute of Soil Science, Teodora Drajzera 7, 11000 Belgrade, SerbiaInstitute of Soil Science, Teodora Drajzera 7, 11000 Belgrade, SerbiaInstitute of Soil Science, Teodora Drajzera 7, 11000 Belgrade, SerbiaMicrobially mediated soil organic matter is an extremely sensitive pool that indicates subtle changes in the quality parameters responsible for the soil’s ecological and productive functions. Fifty years of mineral fertilization of a wheat-corn cropping system has a strong impact on soil quality parameters. The goal of the research was to study the dynamics and quality of soil biological parameters affected by increasing amounts of mineral nitrogen. Soil respiration, potentially mineralizable C and N, microbial biomass C and N and light-fraction OM on Cambisol were analyzed in the following treatments: (1) Control (without fertilization); (2) NPK (60/51/67); (3) NPK (90/51/67); (4) NPK (120/51/67); (5) NPK (150/51/67 kg ha<sup>−1</sup>). The parameters studied were significantly affected by the long-term application of mineral fertilizer compared with both the control and the adjacent native soil. The highest amounts of nitrogen (N150) did not significantly differ from N120 and N90 for most of the parameters studied. Potentially mineralizable C represented the largest labile carbon pool, while microbial biomass N was the largest labile nitrogen pool. The mineralization rates for C and N were oppositely distributed over the seasons. The sensitivity index correlated with the amount of light-fraction OM. The results give a deeper insight into the behavior and distribution of different pools of labile SOM in the agro-landscapes and can serve as a reliable basis for further research focused on zero soil degradation.https://www.mdpi.com/2073-4395/11/10/2026fertilization<i>eutric cambisol</i>microbial biomass C and Nlight-fraction OMpotentially mineralizable C and Nsensitivity index |
| spellingShingle | Nikola Koković Elmira Saljnikov Frank Eulenstein Dragan Čakmak Aneta Buntić Biljana Sikirić Vladan Ugrenović Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen Agronomy fertilization <i>eutric cambisol</i> microbial biomass C and N light-fraction OM potentially mineralizable C and N sensitivity index |
| title | Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen |
| title_full | Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen |
| title_fullStr | Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen |
| title_full_unstemmed | Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen |
| title_short | Changes in Soil Labile Organic Matter as Affected by 50 Years of Fertilization with Increasing Amounts of Nitrogen |
| title_sort | changes in soil labile organic matter as affected by 50 years of fertilization with increasing amounts of nitrogen |
| topic | fertilization <i>eutric cambisol</i> microbial biomass C and N light-fraction OM potentially mineralizable C and N sensitivity index |
| url | https://www.mdpi.com/2073-4395/11/10/2026 |
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