Water, Air, and Soil Pollution

, Volume 69, Issue 1–2, pp 1–20 | Cite as

A nitrogen cycle model for calculating the reduction of N-input necessary to reduce soil acidification and nitrate leaching and the consequences of this for wood production

  • M. Bonneau
  • C. Nys
Article

Abstract

The biogeochemical cycle of elements has been established in a spruce stand in the French Ardennes on a site with a poor acidic soil and a large inputs of nitrogen and sulphate from the atmosphere. This paper shows the interest of studying the seasonal N cycle instead of the global annual cycle, because part of the N input seems to be immobilized in the soil during the dormant season and is released afterwards and taken up during the growing season, and because of the important participation of N inputs in the N-uptake by trees during the growing season. The very large amount of NO3-N leached towards the water table level should be reduced. Using the seasonal cycles, we discuss the relationship between the desirable reduction in the NO3-N output and the N (NH4-N + NO3-N) input. A fertilization trial, including N and Ca, shows a decrease in the wood production after N fertilization. These models give us the opportunity to calculate the reduction of wood production in relation to the reduction of the N input in the ecosystem.

Keywords

Leaching Water Table Annual Cycle Acidic Soil Seasonal Cycle 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • M. Bonneau
    • 1
  • C. Nys
    • 1
  1. 1.Laboratoire des sols forestiersINRA, CRFSeichampsFrance

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