کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4382378 | 1617810 | 2014 | 8 صفحه PDF | دانلود رایگان |
• Long-term effects of different crop managements on soil C pools were compared.
• Amount of soil organic C was higher in wheat/wheat than wheat/faba rotation.
• The wheat/faba rotation improved all measured soil biochemical indicators.
• Field CO2 fluxes from soil was greatly affected by tillage management.
In a dryland Mediterranean agrosystem (Sicily, Italy) a comparative study was carried out among two crop systems (wheat/wheat and wheat/bean) after 19 years under three most used tillage managements (conventional, dual layer and no-tillage), in order to ascertain the effects of those experimental factors, single and combined, on various soil organic C pools (total and extractable organic C, microbial biomass C, basal respiration). Field CO2 fluxes from soil, throughout a year, were also determined. Moreover, C input and output were assessed, as well as microbial and metabolic quotients. Tillage management more than cropping system affected the soil organic C stored in the first 15 cm of soil. After 19 years, no-tillage caused a 3.6 Mg ha−1 increase of C content in wheat/faba rotation while of 5.6 Mg ha−1 in wheat monoculture. The higher soil total organic C content in wheat monoculture was ascribed to a lower quality of residues supplied (higher both C/N ratio and acid detergent fibre (ADF) content). Moreover, wheat/bean rotation increased soil microbial biomass C, basal respiration and microbial quotient, thus suggesting that crop rotation more than tillage management was the driving factor in improving soil biochemical indicators.
Journal: Applied Soil Ecology - Volume 73, January 2014, Pages 140–147