Arable Podzols Are a Substantial Carbon Sink under Current and Future Climates: Evidence from a Long-Term Experiment in the Vladimir Region, Russia
| Autor: | Vladimir Romanenkov, Pavel Krasilnikov, Igor Ilichev, Sergei Lukin, Stanislav Siptits, Vera Pavlova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Atmospheric sciences 01 natural sciences lcsh:Agriculture “4 per 1000” initiative 0105 earth and related environmental sciences 2. Zero hunger Soil health soil health lcsh:S Carbon sink podzols 04 agricultural and veterinary sciences Soil carbon 15. Life on land Manure Podzol RothC model soil organic carbon long-term experiments climate change 13. Climate action Greenhouse gas 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Sink (computing) Arable land Agronomy and Crop Science |
| Zdroj: | Agronomy, Vol 11, Iss 90, p 90 (2021) Agronomy Volume 11 Issue 1 |
| ISSN: | 2073-4395 |
| Popis: | Soil organic carbon (SOC) is an essential component of soil health and a potential sink for greenhouse gases. SOC dynamics in a long-term field experiment with mineral and organic fertilization on loamy sand podzol in the Vladimir Region, Russia, was traced with the dynamic carbon model RothC from 1968 until the present. During this period, C stock increased by 21%, compared to the initial level, with the application of manure, at an average annual rate of 10 t· ha&minus 1. The model was also used to forecast SOC changes up to 2090 for two contrasting RCP4.5 and RCP8.5 climatic scenarios. Up to 2090, steady growth of SOC stocks is expected in all compared treatments for both climate scenarios. In the scenarios, this growth rate was the highest up to 2040, decreased in the period 2040&ndash 2070, and increased again in the period 2070&ndash 2090 for RCP4.5. The highest annual gain was 21&ndash 27&permil under the RCP4.5 scenario and 16&ndash 21&permil under the RCP8.5 scenario in 2020&ndash 2040 in a 0&ndash 20 cm soil layer. Under the expected climate conditions in the 21st century, the C input will increase 1.3&ndash 1.5 times under the RCP4.5 scenario and decrease by 13&ndash 20% for the same period under the RCP 8.5 scenario. Modelling demonstrated potentially more favourable conditions for SOC stability in arable podzols than in Retisols in central Russia in the 21st century. |
| Databáze: | OpenAIRE |
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