Effect of crop residues on CO<sub>2</sub> flux in the CTF system during soil tillage by a disc harrow Lemken Rubin 9

Abstract

Carbon dioxide is one of the most important greenhouse gases. Agriculture, especially soil tillage, contributes to CO<sub>2</sub> emissions significantly. The aim of the paper was the comparison of the amounts of carbon dioxide emissions released from the soil into the atmosphere depending on the controlled traffic farming (CTF) and crop residues. Three variants of the experiment were realised: before the soil tillage, immediately after the soil tillage, and seven days after the soil tillage. The soil tillage was carried out after the harvest of winter wheat by disc harrow Lemken Rubin 9 with a tractor John Deere 8230 on the loamy soil. The monitoring points were selected in parts of the field with and without the crop residues and in trafficked and non-trafficked areas. The CTF system affects CO<sub>2</sub> flux, the amounts of emissions from the non-trafficked areas being higher than those from the trafficked areas. The crop residues left on the field cause a decrease of CO<sub>2</sub> flux. The incorporation of crop residues causes an increase of CO<sub>2</sub> flux.