Organic carbon and nitrogen content in Estonian erosion-affected soils
The work is dedicated to the characterization of erosion-affected soils' (EAS) humus status (HS) in pedo-ecological conditions of South-Eastern Estonia. For understanding HS of EAS their organic carbon (OC) and total nitrogen (NT) sequestration capacities and the ratio C:N was studied by separa...
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| Format: | Article |
| Language: | English |
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Estonian Academic Agricultural Society
2020-12-01
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| Series: | Agraarteadus |
| Subjects: | |
| Online Access: |
http://agrt.emu.ee/pdf/2020_2_kolli.pdf
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| _version_ | 1818644168918958080 |
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| author | Raimo Kõlli Karin Kauer Tõnu Tõnutare |
| author_facet | Raimo Kõlli Karin Kauer Tõnu Tõnutare |
| author_sort | Raimo Kõlli |
| collection | DOAJ |
| description | The work is dedicated to the characterization of erosion-affected soils' (EAS) humus status (HS) in pedo-ecological conditions of South-Eastern Estonia. For understanding HS of EAS their organic carbon (OC) and total nitrogen (NT) sequestration capacities and the ratio C:N was studied by separate soil layers. The average data about soil OC and NT contents (g kg–1) and superficial densities (Mg ha–1) are given by arable soil species. The analysis of reflecting EAS HS on four research areas (Valgjärve, Otepää, Haanja and Mooste) was carried out on the basis of four different origin databases. The analysis of OC content is done by Tjurin and NT by Kjeldahl. In soil associations of erosion-affected areas' the following groups of soils were distinguished: eroded (E), deluvial (D), neutral (N) and non-eroded (En) soils. The HC thicknesses of research area Valgjärve E soils are in limits 18–23 cm, D soils 30–65 cm and of En soils 22–27 cm. The medians of same soils OC concentrations are accordingly 9.4, 11.2 and 10.9 g kg–1 and ratios C:N accordingly 9.8, 9.4 and 10.2. The OC stocks given in the limits of quartiles are in E soils 24–36, D soils 51–143 and En soils 32–49 Mg ha–1. Therefore on eroded areas the perpetual continuums of soil properties' (among these HS) changes may be followed and it is very complicated to separate soil contours on 1:10 000 soil maps. In this work the transitional areas between E and D soils are characterized via N soils. On erosion-affected areas the E and D soils form different soil associations with auto- and hydromorphic normally developed non-eroded soils, where very commonly as well the fluvial (abnormal) soils are presented. The relatively high pedodiversity caused by the areas high geodiversity, is the requisite to the high biodiversity. In erosion-affected regions is extremely important to maintain agricultural activity, as with this is ensured the persistence of naturally beautiful landscapes. The soil cover with EAS acts as accumulator of formed on the same area soil OC. |
| first_indexed | 2024-12-17T00:10:34Z |
| format | Article |
| id | doaj.art-006a4c921ed24c9ba7b0869a38c3f6d8 |
| institution | Directory Open Access Journal |
| issn | 1024-0845 2228-4893 |
| language | English |
| last_indexed | 2024-12-17T00:10:34Z |
| publishDate | 2020-12-01 |
| publisher | Estonian Academic Agricultural Society |
| record_format | Article |
| series | Agraarteadus |
| spelling | doaj.art-006a4c921ed24c9ba7b0869a38c3f6d82022-12-21T22:10:50ZengEstonian Academic Agricultural SocietyAgraarteadus1024-08452228-48932020-12-0131218119010.15159/jas.20.21Organic carbon and nitrogen content in Estonian erosion-affected soilsRaimo Kõlli0Karin Kauer1Tõnu Tõnutare2 Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia, raimo.kolli@emu.ee Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia, raimo.kolli@emu.ee Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, Chair of Soil Science, Fr. R. Kreutzwaldi 5, 51006 Tartu, Estonia, raimo.kolli@emu.ee The work is dedicated to the characterization of erosion-affected soils' (EAS) humus status (HS) in pedo-ecological conditions of South-Eastern Estonia. For understanding HS of EAS their organic carbon (OC) and total nitrogen (NT) sequestration capacities and the ratio C:N was studied by separate soil layers. The average data about soil OC and NT contents (g kg–1) and superficial densities (Mg ha–1) are given by arable soil species. The analysis of reflecting EAS HS on four research areas (Valgjärve, Otepää, Haanja and Mooste) was carried out on the basis of four different origin databases. The analysis of OC content is done by Tjurin and NT by Kjeldahl. In soil associations of erosion-affected areas' the following groups of soils were distinguished: eroded (E), deluvial (D), neutral (N) and non-eroded (En) soils. The HC thicknesses of research area Valgjärve E soils are in limits 18–23 cm, D soils 30–65 cm and of En soils 22–27 cm. The medians of same soils OC concentrations are accordingly 9.4, 11.2 and 10.9 g kg–1 and ratios C:N accordingly 9.8, 9.4 and 10.2. The OC stocks given in the limits of quartiles are in E soils 24–36, D soils 51–143 and En soils 32–49 Mg ha–1. Therefore on eroded areas the perpetual continuums of soil properties' (among these HS) changes may be followed and it is very complicated to separate soil contours on 1:10 000 soil maps. In this work the transitional areas between E and D soils are characterized via N soils. On erosion-affected areas the E and D soils form different soil associations with auto- and hydromorphic normally developed non-eroded soils, where very commonly as well the fluvial (abnormal) soils are presented. The relatively high pedodiversity caused by the areas high geodiversity, is the requisite to the high biodiversity. In erosion-affected regions is extremely important to maintain agricultural activity, as with this is ensured the persistence of naturally beautiful landscapes. The soil cover with EAS acts as accumulator of formed on the same area soil OC. http://agrt.emu.ee/pdf/2020_2_kolli.pdf erosion-affected soilswater and tillage erosiontotal nitrogensoil organic carbonhumus statussustainable soil managementsoil association |
| spellingShingle | Raimo Kõlli Karin Kauer Tõnu Tõnutare Organic carbon and nitrogen content in Estonian erosion-affected soils Agraarteadus erosion-affected soils water and tillage erosion total nitrogen soil organic carbon humus status sustainable soil management soil association |
| title | Organic carbon and nitrogen content in Estonian erosion-affected soils |
| title_full | Organic carbon and nitrogen content in Estonian erosion-affected soils |
| title_fullStr | Organic carbon and nitrogen content in Estonian erosion-affected soils |
| title_full_unstemmed | Organic carbon and nitrogen content in Estonian erosion-affected soils |
| title_short | Organic carbon and nitrogen content in Estonian erosion-affected soils |
| title_sort | organic carbon and nitrogen content in estonian erosion affected soils |
| topic | erosion-affected soils water and tillage erosion total nitrogen soil organic carbon humus status sustainable soil management soil association |
| url |
http://agrt.emu.ee/pdf/2020_2_kolli.pdf
|
| work_keys_str_mv | AT raimokolli organiccarbonandnitrogencontentinestonianerosionaffectedsoils AT karinkauer organiccarbonandnitrogencontentinestonianerosionaffectedsoils AT tonutonutare organiccarbonandnitrogencontentinestonianerosionaffectedsoils |