Journalartikel

Jahr der Veröffentlichung: 1995

Seiten: 529-533

Zeitschrift: Journal of Plant Nutrition and Soil Science

Bandnummer: 158

Heftnummer: 6

ISSN: 0044-3263

Verlag: Wiley-VCH Verlag

Abstract: 
A pot experiment with soil (Cambisol) was carried out to investigate the fate of N-15 (supplied as (NH4NO3)-N-15 or (NH4NO3)-N-15) during an experimental period of 56 days. The soil was either left unsown and incubated at 25 degrees C or sown with grass (Lolium perenne) and cultivated in a greenhouse. Soil samples were taken at intervals of 7 or 14 days and immediatedly frozen at -18 degrees C. After thawing at 4 degrees C the samples were dried at 40 degrees C for 24 hours, extracted with 0.01 M CaCl2 for inorganic N (N-inorg) and organic N (N-org) and analyzed for the N-15 labelling of these fractions. A method for the preparation of extractable N fractions for mass spectrometry by steam distillation was developed and used to separate the inorganic and extractable organic N fraction. Additionally, N-15 in total soil N (N-t) was determined at day 42 and 56 to analyze whether N-15 had been incorporated into nonextractable N fractions. The results showed that, within the experimental period, the incorporation of N-15 into N-org is negligible. Furthermore, there were no indications that this extractable N-org fraction had mediated N flux from inorganic N to nonextractable organic N pools. N-15 losses in the range of 20-30% of the amount supplied were noted.

Harvard-Zitierstil: Sundermann, F., Olfs, H., Neumann, K. and Bender, L. (1995) N-15 partitioning between inorganic and organic N fractions in soil amended with (NH4NO3)-N-15 or (NH4NO3)-N-15 in pot experiments, Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde, 158(6), pp. 529-533

APA-Zitierstil: Sundermann, F., Olfs, H., Neumann, K., & Bender, L. (1995). N-15 partitioning between inorganic and organic N fractions in soil amended with (NH4NO3)-N-15 or (NH4NO3)-N-15 in pot experiments. Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde. 158(6), 529-533.