Journalartikel

Jahr der Veröffentlichung: 1995

Seiten: 351-354

Zeitschrift: Journal of Plant Nutrition and Soil Science

Bandnummer: 158

Heftnummer: 4

ISSN: 0044-3263

DOI Link: https://doi.org/10.1002/jpln.19951580407

Verlag: Wiley-VCH Verlag

Abstract: 
A greenhouse experiment was conducted with Lolium perenne to determine whether ammonium (NH4+-N) fixation by clay minerals can increase the recovery of nitrogen following application of N-15 labelled urea. A silty loam subsoil, B-1 horizon from an Alfisol derived from loess, pH (CaCl2) 7.9, was chosen for the experiment. The NH4+-N fixation capacity was altered by varying the distribution of potassium (K) in the upper and lower soil layer. In the K-0 treatment (control), the upper soil layer fertilized with urea was not supplied with K, whereas the lower soil layer was fertilized with 300 mg K kg(-1) soil. In the K-1-, K-2- and K-3 treatment the upper soil was supplied with 100-, 200- and 300 md K kg(-1) soil, respectively. The soil in the lower layer of the K-3 treatment was not supplied with K. The recovery of N-15 from applied urea (N-15 uptake of Lolium perenne plus residual soil N-15(1)) was 86.1% in the K-0 treatment and 75.2%, 69.1% and 69.6% in K-1-, K-2- and K-3 treatments, respectively, showing that N-15 losses were smallest in the K-0 treatment. Two weeks after applying N-15 labelled urea the amounts of nonexchangeable (NH4+)-N-15-N in the upper soil layer were significantly higher in the K-0 treatment than in the treatments with K application. Apparently, NH4+-N fixation by clay minerals can reduce NH3 volatilization after urea fertilization, if the amount of exchangeable K is low.

Harvard-Zitierstil: DOU, H. and STEFFENS, D. (1995) RECOVERY OF N-15 LABELED UREA AS AFFECTED BY FIXATION OF AMMONIUM BY CLAY-MINERALS, Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde, 158(4), pp. 351-354. https://doi.org/10.1002/jpln.19951580407

APA-Zitierstil: DOU, H., & STEFFENS, D. (1995). RECOVERY OF N-15 LABELED UREA AS AFFECTED BY FIXATION OF AMMONIUM BY CLAY-MINERALS. Journal of Plant Nutrition and Soil Science = Zeitschrift für Pflanzenernährung und Bodenkunde. 158(4), 351-354. https://doi.org/10.1002/jpln.19951580407