Abstract
The purpose of this study was to evaluate the partitioning of individual dry aboveground biomass in Cryptomeria japonica trees, as on its compartments as well as in the vertical profile, and examine whether the Pipe Model Theory, which states a rule between the plant organs, applies to the present case. Data were collected in a plantation established in 1984 in Rio Negro - PR. Twenty representative trees of the population distributed by diameter class were felled and weighed in the field, and their dry biomass were analyzed according to horizontal layers of 5 m wide in the following biomass compartments: sapwood, heartwood, bark, branches and foliage. Biomass is mostly composed by the stem (73.67%). In the wood, 41.66% of the biomass corresponds to sapwood, 26.66% to heartwood and 5.35% to bark. The canopy accounts for 26.33% of the dry biomass, which is represented at 13.75% by branches and 12.58% by foliage. In the first five meters tree biomass is comprised exclusively of wood and bark. From 5 m crown begins to have participation in biomass, becoming the major fraction from 15 m and above in the vertical profile. The partitioning of biomass in heartwood decreases along the vertical profile of the tree, i.e., it is largest at the base and smaller in the lower stratum. This study indicates that the Pipe Model Theory applies to the Cryptomeria japonica forest stand.
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Claims 11
Claim · model-written summary
The stem comprised 73.67% of aboveground biomass.
- Taxon
- Cryptomeria japonica
Cryptomeria japonicae0 - Organ / stage
- steme1
- Outcome
- steme1
- Value
- 73.67%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“the stem (73.67%)”
Claim · model-written summary
Sapwood comprised 41.66% of biomass in the wood.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- sapwoode1
- Outcome
- biomasse1
- Value
- 41.66%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“41.66% of the biomass corresponds to sapwood”
Claim · model-written summary
Heartwood comprised 26.66% of biomass in the wood.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- heartwoode1
- Outcome
- heartwoode1
- Value
- 26.66%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“26.66% to heartwood”
Claim · model-written summary
Bark comprised 5.35% of biomass in the wood.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- barke1
- Outcome
- barke1
- Value
- 5.35%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“5.35% to bark”
Claim · model-written summary
The canopy accounted for 26.33% of dry biomass.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- canopye1
- Outcome
- dry biomasse1
- Value
- 26.33%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“The canopy accounts for 26.33% of the dry biomass”
Claim · model-written summary
Branches represented 13.75% of dry biomass.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- branchese1
- Outcome
- branchese1
- Value
- 13.75%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“13.75% by branches”
Claim · model-written summary
Foliage represented 12.58% of dry biomass.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- foliagee1
- Outcome
- foliagee1
- Value
- 12.58%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“12.58% by foliage”
Claim · model-written summary
The first five meters contained only wood and bark.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Outcome
- tree biomasse1
- Qualifier
- first five meterse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“In the first five meters tree biomass is comprised exclusively of wood and bark”
Claim · model-written summary
Crown biomass appeared above 5 m and became the major fraction from 15 m upward.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- crowne1
- Outcome
- major fractione1
- Qualifier
- from 15 m and abovee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“From 5 m crown begins to have participation in biomass, becoming the major fraction from 15 m and above in the vertical profile”
Claim · model-written summary
Heartwood biomass partitioning decreased along the vertical profile.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Organ / stage
- heartwoode1
- Outcome
- partitioning of biomass in heartwoode1
- Direction
- decreasese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cryptomeria japonica trees”
e1“The partitioning of biomass in heartwood decreases along the vertical profile of the tree”
Claim · model-written summary
The Pipe Model Theory applied to the Cryptomeria japonica stand.
- Taxon
- Cryptomeria japonicaCryptomeria japonicae0
- Outcome
- Pipe Model Theory appliese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study indicates that the Pipe Model Theory applies to the Cryptomeria japonica forest stand”