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Water, Air, and Soil Pollution

, Volume 85, Issue 2, pp 1027–1032 | Cite as

Counteractions Against Acidification in Forests Ecosystems. Effects on stream water quality after dolomite application to forest soil in Gjerstad, Norway

  • A. Hindar
  • P. Nilsen
  • A. Skiple
  • R. Høgberget
Part VI Freshwater Liming and Soil Mitigation

Abstract

The deposition of strong acids is one of many threats to forest ecosystems and viable forestry. Several counteractions against acidification have been launched, e.g. changes in forestry management and the introduction of chemicals. The inter-institutional programme “Counteractions Against Acidification in Forest Ecosystems” was established in 1993 to evaluate existing knowledge and run experimental and fullscale field experiments. A total of 240 metric tons of coarse dolomite powder was spread by helicopter in September 1994 on 84 ha forest catchment dominated by pine (Pinus sylvestris) and Norway spruce (Picea abies). Potential desirable and undesirable effects after this carbonate application may be less pronounced than recorded at other sites due to the relatively moderate dose (3 tons ha−1). Pre-liming stream water quality (mean values for May 1993-September 1994) was as follows: pH 4.8; Ca 1.13 mg L−1; reactive Al (RAl) 248 μg L−1; inorganic monomeric Al (Al) 72 μg L−1. The reference station was slightly higher in Ca and slightly lower in both RAl and Al. Dolomite application resulted in a significant increase in pH to 5.7 as mean value for the post-liming period (September 1994-April 1995). Both Ca and Mg increased significantly after liming, and both RAl and Al, declined significantly. The rapid detoxification of stream-water may be explained by dissolution of dolomite particles in both streams and catchment, a resulting pH increase and change in Al species composition. Retention of Al in the catchment probably explains the reduction in RAl. No increase in NO3, total N, total P or TOC was recorded the first seven months.

Keywords

Lime Dolomite Forest Soil Forest Ecosystem Reference Station 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • A. Hindar
    • 1
  • P. Nilsen
    • 2
  • A. Skiple
    • 1
  • R. Høgberget
    • 1
  1. 1.Norwegian Institute for Water Research - Regional Office SouthGrimstadNorway
  2. 2.Norwegian Forest Research InstituteNorway

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