Effect of draining and fertilization on soil respiration at three ameliorated peatland sites.

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http://hdl.handle.net/1975/9292

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Acta Forestalia Fennica. 1985. 191:1-32.

Title: Effect of draining and fertilization on soil respiration at three ameliorated peatland sites.
Alternative title: Ojituksen ja lannoituksen vaikutus maahengitykseen kolmella suomuuttumalla.
Author: Silvola, Jouko; Välijoki, Jukka; Aaltonen, Heikki
Publisher: Suomen metsätieteellinen seura
Date: 1985
Language: en
ISSN: 0001-5636
URI: http://hdl.handle.net/1975/9292
Abstract: At sites in SE Finland, hourly respiration varied mainly in the range 100-500 mg CO2/msuperscript 2 with changes following those in soil surface temp. with a time lag of 3 h. After groundwater table was reduced by about 0.5 m, respiration increased 2.5-fold (resulting in a rate of peat decomposition considerably in excess of the rate of production of new organic matter in the peat). Application of fast-dissolving PK or urea rapidly increased soil respiration at the site poorest in nutrients. Ash gave the greatest steady increase. At sites rich in nutrients, fertilizer treatment reduced soil respiration for 1-2 yr. Treatment with micronutrients caused an intial reduction in respiration followed by a pronounced increase.
Subject: drainage, land types, phosphorus, potassium, respiration,soil, soil biology, urea
turvemaat
ojitus
lannoitus
lannoitteet
hengitys
hajoaminen
peatlands
drainage
fertilization
fertilizers
respiration
degradation


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