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| Publication Type:
| Refereed |
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| Author(s): | Lindberg, T.;
Bonde, T. A.;
Bergstrom, L.;
Pettersson, R.;
Rosswall, T.;
Schnurer, J. |
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| Author Affiliation: | Department of Microbiology, Box 7025, Swedish University of Agricultural Sciences, Department of Water and Environmental Studies, University of Linkoping, Sweden, Division of Water Management, Department of Soil Science, Swedish University of Agricultural Sciences, and Division of Agricultural Ecology, Department of Ecology and Environmental Reasearch, Swedish University of Agricultural Sciences, respectively. |
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| Title: | Distribution of 15N in the soil-plant system during a four year field lysimeter study with barley (Hordeum distichum L. and perennial meadow fescue (Festuca pratensis Huds.) |
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| Source: | Plant and Soil. Vol. 119, No. 1, September 1989, p. 25-37. |
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| Publishing Information: | Dordrecht, Netherland: Martinus Nijhoff Publishers |
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| # of Pages: | 13 |
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| Related Web URL: | http://link.springer.com/article/10.1007/BF02370266
Last checked: 10/14/2015
Notes: Abstract only |
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| Keywords: | TIC Keywords: Nitrogen; Hordeum vulgare; Festuca pratensis; Leaching
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| Abstract/Contents: | "An annual cereal barley, and a perennial grass ley, meadow fescue, were grown in field lysimeters in Sweden and fertilizer with 12 and 20g Ca(NO3)2-Nm-2yr-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 maximim 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 constrant 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. |
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| Language: | English |
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| References: | Unknown |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lindberg, T., T. A. Bonde, L. Bergstrom, R. Pettersson, T. Rosswall, and J. Schnurer. 1989. Distribution of 15N in the soil-plant system during a four year field lysimeter study with barley (Hordeum distichum L. and perennial meadow fescue (Festuca pratensis Huds.). Plant Soil. 119(1):p. 25-37. |
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