Soil CO2 evolution: Response from arginine additions
نویسنده
چکیده
Short-term response of soil C mineralization following drying/rewetting has been proposed as an indicator of soil microbial activity. Houston Black clay was amended with four rates of arginine to vary microbial responses and keep other soil properties constant. The evolution of CO2 during 1 and 3 days following rewetting of dried soil was highly related to CO2 evolution during 10 days following chloroform fumigation (r = 0.92 and 0.93, respectively) which is awidely usedmethod for soil microbial biomass C, which disrupts cellular membranes. This study suggest that the release of CO2 following rewetting of dried soil with no amendments other than heat and water can be highly indicative of soil microbial activity and possibly be used as a quantitative measurement of soil biological quality in Houston Black soils. Published by Elsevier B.V.
منابع مشابه
Wet Soil Redox Chemistry as Affected by Organic Matter and Nitrate
Wet soil microcosms were established to determine effects of organic matter and nitrate additions on microbial respiration and redox potentials. Organic matter (1%) and nitrate (100 ppm and 200 ppm) treatments were applied in factorial combination. Soil pH, redox potential, and CO2 emissions were measured. Data were analyzed by ANOVA for repeated measures and separately by sampling day. Additio...
متن کاملDaily and seasonal changes in soil amino acid composition in a semiarid grassland exposed to elevated CO2 and warming
Soil amino acids are often an important source of nitrogen (N) for plants, and anticipated global changes, including climate warming and rising atmospheric CO2 levels, have the potential to alter plant and microbial production and consumption of this N source in soils. We determined soil amino acid composition over a 1-year period at diurnal and seasonal time scales in a multi-factor global cha...
متن کاملA meta-analysis of mycorrhizal responses to nitrogen, phosphorus, and atmospheric CO2 in field studies
• Numerous field studies have measured mycorrhizal dynamics under additions of nitrogen (N), phosphorus (P), or atmospheric CO2 to test the hypothesis that plants should invest in mycorrhizal fungi when soil nutrients are limiting. • Here meta-analyses were used to integrate nutrient responses across independent field-based studies. Responses were compared between ectoand arbuscular mycorrhizal...
متن کاملArtificial root exudates and soil organic carbon mineralization in a degraded sandy grassland in northern China
Plant root exudates contain various organic and inorganic components that include glucose, citric and oxalic acid. These components affect rhizosphere microbial and microfaunal activities, but the mechanisms are not fully known. Studies concerned from degraded grassland ecosystems with low soil carbon (C) contents are rare, in spite of the global distribution of grasslands in need of restoratio...
متن کاملThe effect of increased N deposition on nitrous oxide, methane and carbon dioxide fluxes from unmanaged forest and grassland communities in Michigan
Atmospheric nitrogen deposition is anticipated to increase over the next decades with possible implications for future forest-atmosphere interactions. Increased soil N2O emissions, depressed CH4 uptake and depressed soil respiration CO2 loss is considered a likely response to increased N deposition. This study examined fluxes of N2O, CH4 and CO2 over two growing seasons from soils in unmanaged ...
متن کامل