biomassTree: BIOMASS FUNCTIONS

In hansoleorka/skogR: Norske skogfunksjoner (Norwegian Forestry Functions)

BIOMASS FUNCTIONS

Description

Single-tree biomass functions for spruce, pine and birch.

Usage

biomassTree(d, h = NA, sp, components = c("all"))

Arguments

d	Numerical vector with diameter at breast height (cm)
h	Numerical vector with tree heights (m)
sp	Numerical vector with tree species (1 = Norway spruce, 2 = Scots Pine, 3 = Birch)
components	String vector specifying which biomass components to return: sb Biomass of stem bark sw Stem wood biomass st Total stem biomass (independent model including sw and sb) fl Foliage biomass cr Crown biomass br Branch biomass (sum of predictions of cr + fl) db Biomass of dead branches su Stump biomass rf Biomass of fine roots rc Biomass of coarse roots rs Biomass of roots (sum of predictions of rc + rf) sr Biomass of stump-root system ab Total aboveground biomass (sum of predictions of sw + sb + cr + su + db) bg Total belowground biomass (using Petersson & Ståhl 2006) tb Total tree biomass (sum of predictions of ab + bg) all All the above components

Value

A data frame with the dry weight biomass (kg) for the specified components. Column names and order will be the same as in components.

Note

h is optional. Functions with diameter as the only expl. variable will be used if h is not given.

According to FAO the stump is included in the above-ground biomass. su is subtracted from the below-ground biomass calculated using Petterson & Ståhl's function, since this initially includes the stump.

su and sr are for birch calculated using the function for pine.

fl, rf and rc are for birch calculated as sw*f, where f is a factor derived from ??

Author(s)

Marius Hauglin & Ole Martin Bollandsås (2013-2017) [e-mail]

References

Marklund, L.G., 1988. Biomass functions for pine, spruce and birch in Sweden (Report No. 45). Swedish University of Agricultural Sciences, Umeå.

Petersson, H. & Ståhl, G. 2006. Functions for below-ground biomass of Pinus sylvestris, Picea abies, Betula pendula and Betula pubescens in Sweden. Scandinavian Journal of Forest Research 21(Suppl 7): 84-93

FAO, 2010. Global Forest Resources Assessement 2010 - Terms and definitions. Food and Agriculture Organization of the United Nations Working paper 144/E.

hansoleorka/skogR documentation built on March 8, 2024, 7:47 p.m.