Biogenic NO emissions from savanna soils as a function of fire regime, soil type, soil nitrogen, and water status

Washington D.C.

1996

S.23,683-23,688

SonderdruckBandaufführung

174909

A study of NOx emissions from soils representative of nutrient-poor and nutrient-rich savannas and their response to burning and soil water content was carried out in the southern Kruger National Park, South Africa. The study spanned the end of the dry season and the beginning of the west season (September-December 1992). Nitrogen mineralization rates were measured using on in situ technique simultaeously with measurements of NOx emissions. NOx emissions were almost entirely as NO. The relationship between NO emission rate and soil moisture was parabolic regardless of soil type and management practice, with the lowest NO emission rates being measured at low (<0.087) and high (>0.542) water-filled pore space values.