Nitrate leaching from a sub-alpine coniferous forest subjected to experimentally increased N deposition for 20years, and effects of tree girdling and felling

Nitrate leaching from a sub-alpine coniferous forest subjected to experimentally increased N... Increased nitrogen (N) deposition rates were simulated for 20 years (1995–2015) by sprinkling rain water enriched with NH4NO3 (+22 kg ha−1 year−1 N) in a small headwater catchment within a spruce (Picea abies) forest at Alptal (central Switzerland). The added N was labelled with 15NH 4 15 NO3 during the first year. A control catchment was labelled in years 6 and 8. NO3 − leaching doubled in the N-addition catchment during the first year, resulting almost entirely from loss of 15N-labelled NO3 −. The proportion of added N leached as NO3 −–N reached 1/3 after 5 years, then remained stable for the next 10 years, at 6.6–10 kg ha−1 year−1 compared with 1.4–2.9 kg ha−1 year−1 in the control catchment. In each catchment, half of the large trees were girdled during the 15th year and felled 1 year later to assess their role in soil N retention. Girdling and felling resulted in a strong increase in NO3 −–N leaching from the N-addition catchment (up to 19 kg ha−1 year−1). The increase was significantly smaller in the control (up to 4 kg ha−1 year−1). NO3 − leached after tree girdling contained only 0.18% of the originally applied tracer in the control and none detectable in the N-addition catchment. The increased leaching was thus mainly from new N and due to reduced N immobilisation by trees rather than to increased N mineralisation and nitrification in the soil. Dissolved organic N leaching (average 6.1 kg ha−1 year−1), in contrast, was unaffected by the treatment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biogeochemistry Springer Journals

Nitrate leaching from a sub-alpine coniferous forest subjected to experimentally increased N deposition for 20years, and effects of tree girdling and felling

Loading next page...
 
/lp/springer_journal/nitrate-leaching-from-a-sub-alpine-coniferous-forest-subjected-to-OIYdm7bcFx
Publisher
Springer International Publishing
Copyright
Copyright © 2017 by Springer International Publishing AG
Subject
Earth Sciences; Biogeosciences; Ecosystems; Environmental Chemistry; Life Sciences, general
ISSN
0168-2563
eISSN
1573-515X
D.O.I.
10.1007/s10533-017-0364-3
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial