Carbon dioxide fluxes following tillage from a mollisol in the Argentine Rolling Pampa

Seasonal dynamics of soil CO2 efflux in a conventional tilled wheat field of the Loess Plateau, China

“…5, 6). The SCE peaks occurring after tillage might have been due to the fact that (1) tillage incorporates residue into soil, increases microbial substrates and stimulates mineralization of soil organic materials (Alvarez et al 2001;Zhang et al 2011); (2) tillage improves soil aeration and increases contact between soil and crop residues (Alvaro-Fuentes et al 2007); and (3) tillage disrupts soil aggregates and exposes aggregate-protected organic matter to microbial attack (Beare et al 1994;Kristensen et al 2000;Kladivko 2001). Our results were consistent with those of other reports that SCE increased by 2-15 times after tillage (Reicosky et al 1997;Calderon et al 2001;Reicosky 2002;Morris et al 2004;La Scala et al 2005;Gesch et al 2007;Alvaro-Fuentes et al 2007).…”

Multi-scale variability of soil carbon and nitrogen in the middle reaches of the Heihe River basin, northwestern China

“…Macro-aggregates are destroyed and the formation of micro-aggregates is deteriorated. Some SOM physically protected in micro-aggregates is exposed to biodegradation, and soil microbial activity is promoted by the increase in soil temperature (Alvarez et al, 2001;Balesdent et al, 2000;Meersmans et al, 2009). The homogeneous distribution of the C:N ratio in the soil profile of cropland is related to soil structural distortion and higher SOM decomposition due to tillage.…”

Kapitel 2: Land- und Forstwirtschaft, Wasser, Ökosysteme und Biodiversität

“…Eine europäische Vergleichsstudie (Leip et al, 2010) (Alvarez et al, 2001;Ball et al, 1999;Ellert und Janzen, 1999). Untersuchungen an drei Standorten in Niederösterreich ergaben, dass der Einfluss der Bearbeitung auf die Bodenatmung standortspezifisch ist und neben der Pflanzenart wesentlich von den Bodeneigenschaften abhängt.…”