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ECN publicatie:
Titel:
The effect of agricultural management on the CO2 exchange betweenatmosphere and grassland
 
Auteur(s):
Viloria, D.P.; Hensen, A.; Wyers, G.P.
 
Gepubliceerd door: Publicatie datum:
ECN 1996
 
ECN publicatienummer: Publicatie type:
ECN-C--96-071 ECN rapport
 
Aantal pagina's: Volledige tekst:
55  Niet beschikbaar.

Samenvatting:
Agricultural activities, e.g. manure spreading, mowing and grazing, haveinfluence on the uptake and emission of CO2 by grassland. The effect of manure spreading was assessed in detail for 3 periods. Instantaneous emission from manure occurs for 3-5 days after spreading. Total CO2 emission from manure for the Zegveld site in the Netherlands was estimated to be 64 g C m"-2 yr"-"1. The temperature dependence of the emission immediately after spreading was calculated at a range of 0.01 to 0.02 mg CO2 m"-2 s"-"1 C. A CO2 budget was calculated for May to October 1994, using data on mowing, grazing and manure application. Net CO2 fluxes per month were calculated by integrating the average diurnal variation of the CO2 flux for each month. The budget shows a large CO2 emission from soil equivalent to 159 g C m"-2 after correction of the C left in the soil from manure. This yields an estimate of 0.35 cm settling of the soil in 5 months due to oxidation of the organic material. 11 figs., 3 tabs., 5 refs.


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