Plant-derived CO(2) flux from cultivated peat soils

• Methods used to estimate the CO(2) emission from soil commonly measure the total CO(2) flux. To be able to quantify the net CO(2) emission from cultivated peat soils there is a need to distinguish between soil organic matter-derived CO(2) respiration and plant-derived respiration. In this investigation we used the root exclusion method to separate the plant-derived respiration from total CO(2) emission. The plant-derived contribution was estimated to be between 27 and 63% of total CO(2) emission depending on soil type and season. We also found a relationship between soil temperature, biomass growth and CO(2) efflux, which can be used to estimate plant-derived respiration. Due to the priming effect the root exclusion method is less reliable late in the season.

Ämnesord

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Jordbruksvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Agricultural Science (hsv//eng)

LANTBRUKSVETENSKAPER  -- Annan lantbruksvetenskap -- Miljö- och naturvårdsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Other Agricultural Sciences -- Environmental Sciences related to Agriculture and Land-use (hsv//eng)

Nyckelord

CO(2) emission

lysimeter

organic soil

peat

plant-derived respiration

ECOSYSTEM RESPIRATION

Publikations- och innehållstyp

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