Effect of different tillage on soil properties in winter rape crop

https://doi.org/10.7220/9786094674662; https://zua.vdu.lt/wp-content/uploads/2020/12/Agroeco_2020_Abstracts-Book.pdfThere is a significant increase in the concentration of greenhouse gases in the atmosphere, so global warming is a very important issue. The research was carried out at Vytautas Magnus University Agriculture Academy Experimental Station in 2018. The soil in the experimental field was Endohypogleyic-Eutric Planasol – Ple-gln-w, according to FAO, moderate loam on light loam. The aim of the research was to evaluate and compare the effect of different tillage on soil physical properties, CO2 emission in soil in winter rape crop. Soil tillage treatments: 1. Conventional plowing at depth of 23–25 cm (CP); 2. Shallow plowing at depth of 12–15 cm (SP); 3. Deep loosening at depth of 23–25 cm (DP); 4. Shallow loosening at depth of 12–15 cm (SL); 5. Direct sowing in stubble with 5 cm tillage (DS). Reduced soil tillage increased soil moisture from 3.5 to 71.7% but soil temperature affected unevenly. Direct sowing in stubble with 5 cm tillage soil moisture increased from 9,3 to 64,8 % but decreased soil temperature from 0.2 to 7.0% during the winter rape growing season. Direct sowing in stubble with 5 cm tillage and reduced soil tillage had an uneven effect on CO2 emissions in soil. Reduced soil tillage decreased CO2 emissions by 9.3–22.5% only at the beginning of winter rape vegetation and by 23.9–32.9 % at the end of vegetation. Direct sowing (with tillage up to 5 cm) showed lower methane (CH4) content from 3,1 to 4,0 % and higher oxygen (O2) content from 0.2 to 2.1 % in the soil compared to conventional tillageAgronomijos fakultetasVytauto Didžiojo universiteta