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National and regional net nitrogen balances in Finland in 1990-2005

Salo, Tapio; Lemola, Riitta and Esala, Martti (2007) National and regional net nitrogen balances in Finland in 1990-2005. Agricultural and Food Science, 16 (4), pp. 366-375.

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Summary

Nitrogen (N) balance has been identified as a principal agri-environmental indicator. In addition to national N balances, calculation of N balances for different agricultural regions is also recommended. In this study, national and regional net N balances for Finland were calculated. The net N balance is the result of deducting the NH3-N losses from manure and fertilisers from the gross N balance. The N balance calculation was based on data for Finnish Rural Centres and calculated per cultivated hectare. The main data inputs for the calculations were agricultural and environmental statistics, coefficients of manure excretion and crop N concentrations. Finnish national net N balance decreased from 90 kg ha–1 in 1990 to 50 kg ha–1 in 2005. The decrease in regional N balances was of the same magnitude. The main reason for the lower N balances was reduced use of mineral N fertilisers. Variation in the N balances was due to yield levels varying according to growing season conditions. The Rural Centres with intensive animal production tended to generate the highest N balances.


EPrint Type:Journal paper
Keywords:nitrogen balance, agricultural regions, animal manures, fertiliser, yield
Subjects: Soil > Nutrient turnover
Research affiliation: Finland > MTT Agrifood Research
ISSN:1795-1895
Related Links:http://www.mtt.fi/english
Deposited By: Koistinen, Riitta
ID Code:16896
Deposited On:24 Mar 2010 10:16
Last Modified:12 Apr 2010 07:43
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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