Abstract
AbstractAbstractThe length increment and production of Sphagnum fuscum with enhanced nitrogen deposition (0, 10,30 and 100 kg N ha−1 yr−1) and CO2 concentration (350, 700,1000 and 2000 ppm) were measured. The experiment was carried out in the glasshouse, where S. fuscum was grown with the water table maintained at 10 cm below the moss surface for 120d.For length growth, 10 kg N ha−1 yr−1 and for biomass production, 30 kg N ha−1 yr−1 were found to be the optimal loads. A load of 100 kg N ha−1 yr−1 inhibited elongation and biomass production almost completely. An increased CO2 concentration reduced length increment slightly, but it did not have a significant effect on biomass production. However, above ambient CO2 concentrations increased capitulum density and stem dry mass per unit length. In addition, increased CO2 concentration accelerated relative growth in Sphagnum carpets when these also received additional nitrogen.The study highlights the high degree of spatial variability that occurs within Sphagnum fuscum. Differences in growth and biomass production between samples, not found in natural conditions, emerged during the experiment.On the basis of our results, the present nitrogen deposition load in Southern Finland (ca 6-10 kg N ha−1yr−1) is quite suitable for the growth and production of S. fuscum. If N deposition increased substantially, differences in the vitality of the species might be expected.
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Claims 9
Claim · model-written summary
For length growth, 10 kg N ha−1 yr−1 was the optimal nitrogen deposition load.
- Taxon
- Sphagnum fuscum
Sphagnum fuscume1 - Treatment
- nitrogen depositione1
- Outcome
- length growthe2
- Value
- 10 kg N ha−1 yr−1e2
- Qualifier
- optimal loadse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e2“For length growth, 10 kg N ha−1 yr−1 and for biomass production, 30 kg N ha−1 yr−1 were found to be the optimal loads”
Claim · model-written summary
For biomass production, 30 kg N ha−1 yr−1 was the optimal nitrogen deposition load.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- nitrogen depositione1
- Outcome
- biomass productione2
- Value
- 30 kg N ha−1 yr−1e2
- Qualifier
- optimal loadse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e2“For length growth, 10 kg N ha−1 yr−1 and for biomass production, 30 kg N ha−1 yr−1 were found to be the optimal loads”
Claim · model-written summary
A nitrogen deposition load of 100 kg N ha−1 yr−1 almost completely inhibited elongation and biomass production.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- 100 kg N ha−1 yr−1e3
- Outcome
- elongation and biomass productione3
- Direction
- inhibitede3
- Qualifier
- almost completelye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e3“A load of 100 kg N ha−1 yr−1 inhibited elongation and biomass production almost completely”
Claim · model-written summary
Increased CO2 concentration slightly reduced length increment of Sphagnum fuscum.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- increased CO2 concentratione4
- Outcome
- length incremente4
- Direction
- reducede4
- Qualifier
- slightlye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e4“An increased CO2 concentration reduced length increment slightly, but it did not have a significant effect on biomass production”
Claim · model-written summary
Increased CO2 concentration had no significant effect on biomass production of Sphagnum fuscum.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- increased CO2 concentratione4
- Outcome
- biomass productione4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e4“An increased CO2 concentration reduced length increment slightly, but it did not have a significant effect on biomass production”
Claim · model-written summary
Above ambient CO2 concentrations increased capitulum density and stem dry mass per unit length of Sphagnum fuscum.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- above ambient CO2 concentrationse5
- Outcome
- capitulum density and stem dry mass per unit lengthe5
- Direction
- increasede5
- Comparator
- ambient CO2 concentrationse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e5“above ambient CO2 concentrations increased capitulum density and stem dry mass per unit length”
Claim · model-written summary
Increased CO2 concentration accelerated relative growth of Sphagnum carpets when they also received additional nitrogen.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Treatment
- increased CO2 concentratione6
- Outcome
- relative growthe6
- Direction
- acceleratede6
- Qualifier
- when these also received additional nitrogene6
- Setting
- glasshousee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e6“increased CO2 concentration accelerated relative growth in Sphagnum carpets when these also received additional nitrogen”
e7“The experiment was carried out in the glasshouse”
Claim · model-written summary
Sphagnum fuscum shows a high degree of spatial variability in growth.
- Taxon
- Sphagnum fuscumSphagnum fuscume0
- Outcome
- spatial variabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The study highlights the high degree of spatial variability that occurs within Sphagnum fuscum”
Claim · model-written summary
The present nitrogen deposition load in Southern Finland is quite suitable for growth and production of Sphagnum fuscum.
- Taxon
- Sphagnum fuscumSphagnum fuscume1
- Outcome
- growth and productione0
- Qualifier
- quite suitablee0
- Setting
- Southern Finlande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The length increment and production of Sphagnum fuscum with enhanced nitrogen deposition”
e0“the present nitrogen deposition load in Southern Finland (ca 6-10 kg N ha−1yr−1) is quite suitable for the growth and production of S. fuscum”
The same questions in other papers
co2 · yield · Sphagnum fuscumPositive and negative results
1 in the opposite direction
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.