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Simulation of the long-term effect of carbon farming practices under future climateтезисы доклада
- Авторы: Romanenkov V., Khusniev I., Ilichev I., Krasilnikov P.
- Сборник: Centennial Celebration and Congress of the International Union of Soil Sciences. Abstract book
- Тезисы
- Год издания: 2024
- Место издания: AIM Group International Florence, Italy
- Первая страница: 495
- Последняя страница: 495
- Номер статьи: 137225
- Аннотация: For 6 long-term field experiments with fertilizers located in the European Russia on retisols, podzols and chernozems, the observed and predicted dynamics of soil organic carbon stocks in the arable layer was studied for the contrasted treatments. RothC dynamic model was used to assess the impact of climate change until the end of the century on the ability to enhance carbon sequestration after modification of agricultural practices. The impact of such carbon farming practices as elimination of the fallow field; changes in crop rotation; rates of applied manure; replacing manure with alternative organic fertilizers and minimum tillage was simulated. For almost all the experiments studied, the forecast of soil OM dynamics under future climate makes it possible to achieve the goal of 4 ppm. The period until 2055-60 is more favorable for sequestration of C. For chernozems, the accumulation period is limited to 2040, after which it is possible to maintain previously accumulated C stocks until 2070-80, after which losses are expected to accelerate. In this period RCP4.5 climate scenario tends to be more favorable compared to the RCP8.5 when soil C stock is less than 30 Mg/ha, an additional accumulation of about 2 ppm is provided. The average C rate accumulation does not exceed 10‰, although for podzols it can be as high as 20‰. For SOC stocks more than 60 Mg/ha, no differences are observed between the two climate scenarios. The most promising carbon farming practices are correct rate of organic fertilizers as well as perennial grasses in crop rotation. The application of alternative sources of organic fertilizers made it possible to accumulate additional C, while the efficiency decreased in the series compost and peat mixtures>biochar >manure>green manure in equivalent C rates. Changing the manure rates and replacing manure with alternative organic fertilizers is considered as a short-term effect, manifested mainly in the accumulation of additional C stock, without changing the time of saturation.
- Добавил в систему: Романенков Владимир Аркадьевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | IUSS2024_137225_aiy53qh.pdf | 316,0 КБ | 9 июля 2024 [RomanenkovVA] | |
| 3. | Полный текст | IUSS2024_137225.pdf | 316,0 КБ | 9 июля 2024 [RomanenkovVA] |