Field method to determine N2O emission from nitrification and denitrification

被引：43

作者：

Müller, C ^{[1
]}

Sherlock, RR

Williams, PH

机构：

[1] Univ Giessen, Dept Appl Microbiol, D-35390 Giessen, Germany

[2] Lincoln Univ, Dept Soil Sci, Canterbury, New Zealand

[3] New Zealand Inst Crop & Food Res, Canterbury, New Zealand

来源：

BIOLOGY AND FERTILITY OF SOILS | 1998年 / 28卷 / 01期

关键词：

nitrous oxide; nitrification; denitrification; soil cores; acetylene;

D O I：

10.1007/s003740050462

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Nitrous oxide (N2O) emissions via the nitrification (I-nit) and denitrification (I-den) pathways were successfully measured with in-field incubation of soil cores in preserving jars at 0 Pa and 5-10 Pa acetylene. From the incubations, fractions of nitrification - N2O over total N2O (I-nit/I-tot)- and denitrification - N2O over total N2O (I-den/I-tot) - were obtained. Actual field emissions of N2O via nitrification (F-nit) and denitrification (F-den) were calculated by multiplying the fractions from the incubation technique with the daily N2O emission (F-day) determined with a direct soil cover method. The approach presented here was successful for a whole range of soil moisture conditions in intensive grassland. F-nit and F-den followed the trends of soil ammonium and soil nitrate.

引用

页码：51 / 55

页数：5

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