e-journal

Additional nitrogen in arctic-alpine soils and plants—a pilot study with 15NO3 and 15NHþ4 fertilization along an elevation gradient

---

Nitrogen (N) deposition has been increasing in alpine ecosystems, but its fate in soils and plants
remains unclear. We assumed that the increased N load will be efficiently retained in alpine ecosystems
but that the degree of N use efficiency changes with elevation. Thus, we performed a 3-year 15N tracer experiment, in which we added 1 g m–2 of either NH415NO3 or 15NH4NO3 fertilizer to a plot of 1 m2 in size at three elevations. Composite soil samples and aboveground plant material from lichens, dwarf shrubs, and graminoids were collected annually for three years and analyzed for their 15N accrual. We found a cumulative and plateauing rise in 15N concentration in soils and plants at all sites. However, overall recovery of the tracer decreased with time, amounting to 71% of fertilizer recovered in the soils in the first year, 69% recovered in soils and plants in the second year, and 37% in soils and plants in the third year. Moreover, the fertilizer use efficiency varied among fertilizer types and plant functional types. This utilization pattern appears to be modulated by elevation.

Key words: high mountain ecosystems / nitrogen uptake / 15N tracer method / atmospheric N deposition /
Norwegian scandes

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

J. Plant Nutr. Soil Sci.

No. Panggil

-

Penerbit

New York : WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim., 2015

Deskripsi Fisik

J. Plant Nutr. Soil Sci. 2015, 178, 861–867

Bahasa

English

ISBN/ISSN

DOI: 10.1002/jpln.20

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

2015, 178

Subjek

PERTANIAN.

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar