Effect of Biochar on Soil CO2 Fluxes from Agricultural Field Experiments in Russian Far East

Agronomy

Mariia A. Bovsun¹  Tatyana Y. Karpenko¹  Alexandra I. Khokhlova¹  Anastasia V. Brikmans¹  Olga V. Nesterova¹  Viktoriia. A. Semal¹  Simona Castaldi²  Nikolay A. Sakara³ 

[1] Department of Soil Science, School of Natural Sciences, Far Eastern Federal University, 690090 Vladivostok, Russia;Far Eastern Climat Smart Lab, 690090 Vladivostok, Russia;Primorskaya Vegetable Experimental Station, All-Russian Scientific Research Institute of Vegetables, 692779 Artyom, Russia;

关键词: biochar;    agriculture;    CO₂ emission;    soil;    Russian Far East;    Luvic Antrosols;   

DOI  :  10.3390/agronomy11081559

来源: DOAJ

【 摘 要 】

Agricultural soils are a major source of greenhouse gases. Biochar is a soil improver and, when applied to the soil, sequesters carbon. However, a different combination of soil and climatic conditions and biochar leads to different research results. In this research, the effects of 1 kg/m² and 3 kg/m² biochar application to clay soils on the CO₂ flow in field experiments along two cropping seasons in the Russian Far East were investigated. Data showed that biochar significantly reduces the cumulative flow of soil CO₂, compared with untreated field plots. In 2018, the greatest reduction in soil CO₂ emissions (28.2%) with 3 kg/m² of biochar was obtained, while in 2019, the greatest decrease in the cumulative CO₂ flow at the application dose of 1 kg/m² (57.7%) was recorded. A correlation between a decrease in the value of the cumulative CO₂ flux and an increase in the biomass grown in the studied areas of agricultural crops during the season of 2018 was found.

【 授权许可】

Unknown