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A model simulation analyses of nitrate leaching – does soil organic matter pool structure or catch crop growth parameters matter most?

Pedersen, Anders; Petersen, Bjørn Molt; Eriksen, Jørgen; Hansen, Søren and Jensen, Lars Stoumann (2007) A model simulation analyses of nitrate leaching – does soil organic matter pool structure or catch crop growth parameters matter most? Ecological Modelling, 205, pp. 209-220.

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Summary

Modelling of soil organic matter (SOM) turnover has often been developed in order to or to predict crop fertilser demand or to analyse environmental impact of different agriculture management practices. Mechanistic simulation models can be used to predict the mineralization of nitrogen (N) in added organic matter, e.g. from animal manure or incorporated crop residues, and the timing of N availability to the succeeding crops. In this way, mechanistic models may be used to avoid excessive fertilisation and hence to minimise nitrate leaching. The objective of this work was therefore to analyse the consequences of applying different SOM and crop modules (differing in pool structure or parameterisation) in the soil-plant-atmosphere model Daisy on the simulated crop production, soil nitrogen dynamics and nitrate leaching. We addressed the following questions: i) How much are Daisy simulations of crop production as well as nitrate leaching affected by applying different SOM module structures or parameterisation? ii) Are simulations of nitrogen dynamics and nitrate leaching more affected by different choice of crop modules than choice of SOM modules? We used an extensive 6-year field experiment for comparing simulated and measured data. The experiment comprised 3-y perennial ryegrass and grass-clover pastures under different management and subsequently cropped to spring cereals (including catch crop) with different manuring strategies for 3 years.


EPrint Type:Journal paper
Keywords:simulation modelling Daisy grass-clover leys soil organic matter catch crops
Subjects: Soil > Nutrient turnover
Crop husbandry > Crop combinations and interactions
Food systems > Recycling, balancing and resource management
Environmental aspects > Air and water emissions
Research affiliation: Denmark > DARCOF II (2000-2005) > I. 3 (BIOMOD) Interaction between nitrogen dynamics, crop production and biodiversity
Denmark > KU-LIFE - Faculty of Life Sciences
Denmark > SOAR - Research School for Organic Agriculture and Food Systems
Deposited By: Jensen, Dr. Lars Stoumann
ID Code:4622
Deposited On:29 Mar 2005
Last Modified:23 Apr 2013 09:02
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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