Offered Papers Theme B: Grassland and the Environment
Description
It is generally assumed in field experiments, that the measurement of nitrous oxide (N2O) using enclosed chambers for a period of 1 hour can be used to provide an estimate of daily emission rates. In the majority of studies, emission measurements are conducted between 0900 and 1300 h. However, clearly defined diurnal cycles in N2O emission rates have been observed from both agricultural and forest soils in temperate regions as a consequence of diurnal fluctuations in temperature (Blackmer et al., 1982; Ball et al., 1999; Baggs et al., 2002). The objective of this study was to quantify the diurnal variation in N2O emissions from a grassland soil receiving two rates of nitrogen (N) fertiliser inputs under ambient spring and summer conditions.
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
An Examination of the Diurnal Variability in Nitrous Oxide Emissions
It is generally assumed in field experiments, that the measurement of nitrous oxide (N2O) using enclosed chambers for a period of 1 hour can be used to provide an estimate of daily emission rates. In the majority of studies, emission measurements are conducted between 0900 and 1300 h. However, clearly defined diurnal cycles in N2O emission rates have been observed from both agricultural and forest soils in temperate regions as a consequence of diurnal fluctuations in temperature (Blackmer et al., 1982; Ball et al., 1999; Baggs et al., 2002). The objective of this study was to quantify the diurnal variation in N2O emissions from a grassland soil receiving two rates of nitrogen (N) fertiliser inputs under ambient spring and summer conditions.
