Search: onr:"swepub:oai:DiVA.org:oru-52230" >
Distribution of15N ...
-
Lindberg, T.Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden
(author)
Distribution of15N in the soil-plant system during a four-year field lysimeter study with barley (Hordeum distichum L.) and perennial meadow fescue (Festuca pratensis Huds.)
- Article/chapterEnglish1989
Publisher, publication year, extent ...
-
Dordrecht, Netherlands :Kluwer Academic Publishers,1989
-
printrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:oru-52230
-
https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-52230URI
-
https://doi.org/10.1007/BF02370266DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
An annual cereal, barley, and a perennial grass ley, meadow fescue, were grown in field lysimeters in Sweden and fertilized with 12 and 20g Ca(NO3)2-N m-2 yr-1, respectively. Isotope-labeled (15N) fertilizer was added during year 1 of the study, whereafter similar amounts of unlabeled N were added during years 2 and 3. The grass ley lysimeters were ploughed after the growing season of year 3 and sown with barley during year 4. The barley harvest in year 1 removed 59% of the added fertilizer N, while the fertilizer N export by two meadow fescue harvests in year 1 was 65%. The labeled N export decreased rapidly after year 1, especially in the barley, but increased slightly after ploughing of the grass ley.The microbial biomass, measured with the chloroform fumigation method, incorporated a maximum of 1.4-1.7% of the labeled N during the first seven weeks after application. Later on, the incorporation stabilized at less than 1% in both cropping systems.The susceptibility of the residual labeled N to mineralization was evaluated three years after application by means of long-term laboratory incubations. The curves of cumulative mineralized N were described by a two-component first-order regression model that differentiated between an available and a more recalcitrant fraction of potentially mineralizable N. There was no difference in the amounts of potentially mineralizable N between the cropping systems. The labeled N comprised 5 and 2% of the amounts of potentially mineralizable N in the available and more recalcitrant fraction, respectively. The mineralization rate constants for the labeled N were almost twice as high as for the total potentially mineralizable N. The available fraction of the total potentially mineralizable N was 12%, while twice that proportion of the labeled N was available.It was concluded that the short-term ley did not differ from the annual crop with respect to the early disposition of the fertilizer N and the behaviour of the residual organic N.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Bonde, T. A.Department of Water and Environmental Studies, University of Linköping, Linköping, Sweden
(author)
-
Bergström, L.Department of Soil Science, Division of Water Management, Swedish University of Agricultural Sciences, Uppsala, Sweden
(author)
-
Pettersson, R.Division of Agricultural Ecology, Department of Ecology and Environmental Research, Swedish University of Agricultural Sciences, Uppsala, Sweden
(author)
-
Rosswall, T.Department of Water and Environmental Studies, University of Linköping, Linköping, Sweden
(author)
-
Schnürer, Johan,1957-Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden(Swepub:oru)jhsr
(author)
-
Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, SwedenDepartment of Water and Environmental Studies, University of Linköping, Linköping, Sweden
(creator_code:org_t)
Related titles
-
In:Plant and SoilDordrecht, Netherlands : Kluwer Academic Publishers119:1, s. 25-370032-079X1573-5036
Internet link
Find in a library
To the university's database