ISSN:
1432-0789
Keywords:
Selenite
;
Se-effects on soil
;
Mull
;
Moder
;
Mor
;
N-Mineralization
;
Enzym activity
;
CO2-production
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Effects of Na2SeO3 on microbial activity of mull, moder and mor soils were investigated with perfusion experiments under controlled laboratory conditions. Treatments with Se at 50 mg/kg reduced carbon dioxide production and dehydrogenase activity in the mor and moder soils. Se at 250 (Ah) to 1000 (L) mg/kg had to be added to the mull soil in order to affect both parameters. In contrast to the effect on respiration and dehydrogenase activity, N mineralization, especially ammonification, was stimulated by the addition of Se. This is probably due to secondary effects such as dissolution of organic matter and P desorption. The relative inhibition of arylsulfatase activity was closely correlated with a decrease in soil respiration. It was conduded that the reduction of arylsulfatase activity in Se-treated soils was the result of a reduction in enzyme synthesis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00257665
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