Effect of biochar amendment and nitrogen fertilization on soil CO2 emission during spring period
Effect of biochar amendment and nitrogen fertilization on soil CO2 emission during spring period
PDFAuthors: Tatijana Kotuš, Ján Horák and Katarína Drgoňová
Volume/Issue: Volume 25: Issue 2
Published online: 01 Nov 2022
Pages: 121 - 128
Abstract
Biochar application to agriculture soil has been recommended as a strategy to reduce increasing CO2 emission in the atmosphere and mitigate climate change. In this study, we evaluated the impact of two doses of biochar (10 and 20 t.ha-1) applied in 2014 and reapplied in 2018 combined with three fertilization levels (N0, N1, N2) on carbon dioxide emissions and selected physical and chemical soil properties in fi eld conditions during spring season (April–June) in 2020. The fi eld site is situated in the Nitra region of Slovakia (Malanta). The soil in the fi eld was classifi ed as a silt loam Haplic Luvisol. In this fi eld research it was found that biochar application mostly in all treatments decreased cumulative CO2 emissions in rage from 4.2% to 30.4% compared to controls (B0N0, B0N2), except treatments where biochar was applied with lower level of N-fertilizer (N1) and treatment B20N0. According to our study results, it was confi rmed that biochar can be a promising material for improving soil physical and chemical properties. Mainly, it has very good impact on soil pH, even after seven years of fi eld experiment established. However, the response of soil CO2 fl uxes to biochar application were regulated mainly by experiment length, biochar application rate, biochar properties, giving a new perspective for more comprehensive understanding on biochar.
Keywords: biochar, CO2 emission, soil chemical and physical properties
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