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Initial effects of forest N, Ca, Mg and B large-scale fertilization on surface water chemistry and leaching from a catchment in central Sweden

Lundin, Lars and Nilsson, Torbjörn (2014). Initial effects of forest N, Ca, Mg and B large-scale fertilization on surface water chemistry and leaching from a catchment in central Sweden. Forest ecology and management. 331, 218-226
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Official URL: http://doi.org/10.1016/j.foreco.2014.08.017

Abstract

Highly increased use of biomass production is placing great demands on Swedish forests. Several silvicultural measures can be implemented to increase forest production and fertilization being addressed in this paper is one. Forest companies are now increasingly applying fertilizer, with the main nutrient needed for high forest growth being nitrogen (N). This study investigated how commercial N fertilization (150 kg N/ha, including also Ca, Mg and B) of the 45 ha forest catchment Risfallet in central Sweden affected chemical composition and runoff export in stream water during one year after the fertilization. This well-defined and long-term monitored catchment proved very suitable for studies of water quality and nutrient losses. The fertilizer consisted of ammonium nitrate (50/50 ammonium and nitrate, respectively), plus calcium (Ca, 22 kg ha (Mg, 12 kg ha boron availability. The study was carried out according to the paired catchment method using a control area and a calibration period. Data from the after treatment period were compared with previous 25-year monitoring data for the catchment and also data for a similar 83 ha control catchment, Gusseltjärn, in the same region. During the first year after treatment, the nitrate concentration in stream water increased from 0.05 mg L ammonium (300%), B (3-fold), Mg (80%), Ca (60%), potassium (K) (50%) and sodium (Na) (40%). The pH decreased in the first half-year by 0.2 pH-units. One year after treatment, 14% of the N applied had leached from the catchment.1) and magnesium1) to mitigate acidification and boron (B 1.1 kg ha1) to compensate for decreased1 to 3.3 mg L1 on average. Other elements showing increased concentrations were ammonium (300%), B (3-fold), Mg (80%), Ca (60%), potassium (K) (50%) and sodium (Na) (40%). The pH decreased in the first half-year by 0.2 pH-units. One year after treatment, 14% of the N applied had leached from the catchment.

Authors/Creators:Lundin, Lars and Nilsson, Torbjörn
Title:Initial effects of forest N, Ca, Mg and B large-scale fertilization on surface water chemistry and leaching from a catchment in central Sweden
Series/Journal:Forest ecology and management (0378-1127)
Year of publishing :2014
Volume:331
Page range:218-226
Number of Pages:9
Publisher:Elsevier
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Forest
ISSN:0378-1127
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
P Natural resources > P30 Soil science and management
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Agrovoc terms:fertilization, forests, watersheds, nitrogen, boron, chemistry, water
Keywords:fertilization, forest, catchment hydrology, nitrogen, boron, water chemistry
URN:NBN:urn:nbn:se:slu:epsilon-e-2303
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2303
Additional ID:
Type of IDID
DOI10.1016/j.foreco.2014.08.017
ID Code:11580
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:15 Jan 2015 16:11
Metadata Last Modified:29 Jan 2015 23:57

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