ISSN:
1432-0789
Keywords:
Denitrification
;
Acetylene inhibition technique
;
Grassland
;
Lolium perenne
;
Animal slurry
;
Dicyandiamide
;
Nitrification inhibition
;
Ammonium nitrate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract In a field experiment, the effect of animal slurry, (with and without the nitrification inhibitor dicyandiamide on total denitrification losses estimated by the C2H2 inhibition technique was measured over 2 years (1989–1990). During this period, four different plots (each with four replicates) were fertilized six times with 150 kg N ha-1 in the form of cattle-pig slurry or NH4NO3. Soil samples (0–20 cm) were analysed at regular intervals for NH inf4 sup+ and NO inf3 sup− concentrations. The soil water content was determined gravimetrically. During the first year (1989) total denitrification losses from unfertilized, mineral-fertilized, and animal slurry-amended plots (with or without dicyandiamide) were estimated as 0.2, 3.1, 0.7, and 0.6 kg N ha-1, respectively. During the second year (1990) the denitrification losses were 0.4, 1.3, 0.7, and 0.7 kg N ha-1, respectively. There was a clear relationship between the NO inf3 sup− concentration or soil water content and the denitrification rate. The results are siteund experiment-specific and cannot be generalized so far.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00570636
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