Soil moisture effects on gross nitrification differ between adjacent grassland and forested soils in central Alberta, Canada
作者： Yi Cheng , Zu-cong Cai , Jin-bo Zhang , Man Lang , Bruno Mary
DOI: 10.1007/S11104-011-0997-2
关键词:
摘要: Changes in soil moisture availability seasonally and as a result of climatic variability would influence nitrogen (N) cycling different land use systems. This study aimed to understand mechanisms on gross N transformation rates. A laboratory incubation experiment was conducted evaluate the effects content (65 vs. 100% water holding capacity, WHC) rates using 15N tracing technique (calculated by numerical model FLUAZ) adjacent grassland forest soils central Alberta, Canada. Gross mineralization NH 4 + immobilization were not influenced for both soils. nitrification greater at 100 than 65% WHC only soil. Denitrification during 9 days 2.47 4.91 mg N kg-1 d-1 soils, respectively, WHC, but from zero WHC. In soil, ratio (N/IA) cumulative N2O emission lower 65 treatment, while N/IA similar between two treatments The effect differ decreasing reduced emissions
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