caa a22 4500 477110932 CHVBK 20180405111608.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02415522 doi (NATIONALLICENCE)springer-10.1007/BF02415522 Effects of urine on soil microbial biomass, methanogenesis, nitrification and denitrification in grassland soils [Elektronische Daten] [R. Lovell, S. Jarvis] Urine was added under controlled conditions to intact turfs taken from long-term permanent pasture on clay loam and sandy loam soils in South West England. Methane exchanges were small (<+/−0.03 μg CH4 m-2 min-1) and overall absorption equalled or exceeded emission in both soils. On the clay loam, wetting with water or urine increased soil microbial biomass C and N contents by about 20% but there was no specific effect of urine. Urine, however, caused an increase in soil respiration of >50% and the average increase was greater for cow's urine (30.8 mg CO2 m-2 min-1) than for an artificial urine (20.1 mg CO2 m-2 min-1). Emissions of nitric and nitrous oxides following urine application were substantial (on average 0.36 μg NO-N and 29 μg N2O-N m-2 min-1) but short lived (<40 days). The high levels of ammonium found in the urine treated soils (>200 mg NH4 +-N kg-1) were nitrified to nitrate over a period of 42 days. Qualitative changes in the soil microbial biomass were evidently not related to biomass size. Relationships between trace gas emissions and soil processes are discussed. ei]Section editor: R Merckx Kluwer Academic Publishers, 1996 denitrification nationallicence methane nationallicence nitrification nationallicence nitrous oxide nationallicence nitric oxide nationallicence soil microbial biomass nationallicence soil respiration nationallicence urine patches nationallicence Lovell R. Institute of Grassland and Environmental Research, North Wyke, EX20 2SB, Okehampton, Devon, UK aut Jarvis S. Institute of Grassland and Environmental Research, North Wyke, EX20 2SB, Okehampton, Devon, UK aut Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 265-273 0032-079X 186:2<265 1996 186 11104 https://doi.org/10.1007/BF02415522 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02415522 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lovell R. Institute of Grassland and Environmental Research, North Wyke, EX20 2SB, Okehampton, Devon, UK aut NATIONALLICENCE 700 1- Jarvis S. Institute of Grassland and Environmental Research, North Wyke, EX20 2SB, Okehampton, Devon, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 265-273 0032-079X 186:2<265 1996 186 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer