Technical details for Bamboo stock assessment field measurement.

1. Bamboo stock and carbon
assessment
Bamboo stock and carbon
assessment
Trinh Thang Long

2. Tools
• Calipers, Diameter tape, Suunto

3. Equipement
• Distance tapes
• Ropes
• Diameter tape
• Big knifes
• Compass
• Suunto/ clinometers
• Recording sheets
• Pens, pencils
• Slope correction table
• Markers/ poles
• Cameras
• GPS
• Maps
• Paint
• First aid kits
• Personnel staffs

4. Culm ages
The features used to determine the bamboo culm age for Bambusa genus
•First year of age: The bamboo culm that finishes its growth period in the previous rainy season is characterised as follows:
- The sheath still exists on culm, usually near the root.
- The culm colour is light green and covered by a layer of ‘white powder’;.
- Many small branches appear along the main culm. Very few young branches occur on the upper culm.
•Second year of age:
-The sheath is not present.
-The culm colour is green. It is covered by a layer of ‘white powder’; however, it is less than that of the first year. Minimal lichen or none is
present near the root.
-Many branches have appeared. Young sub-branches may occur.
•Third year of age:
- The main culm colour is dark green; lichens cover 30-40 per cent of the culm surface, creating white spots in the culm. The green
colour of culm is still visible.
- The branches are mainly on top of the tree. The old main branches turn dark green with spotted lichen. Sub-branches may show.
•Fourth year of age:
-Culm is white due to the strong presence of lichen (accounts for 70-80 per cent of culm surface).
-The branches are limited to the upper culm. The old, main branches turn dark green with spotted lichen.
•Five years and more:
-The culm colour changes to yellow, and dense lichen develops along the culm.
-Decay and fall are apparent.

5. Culm measurement in plot for running and
long necked rhizome clumping bamboos
Plot ID: Coordinate: X: Y:
Plot size: Plot shape: Forest type:
Average bamboo culm height (m): Species of bamboo:
Slope (degree): Altitude (m):
Recorded by: Date:
Culm
ID
Culm age (A, year) Culm diameter at
breast height (D, cm)
Culm
ID
Culm age (year) Culm diameter
(D, cm)

6. Clumping based culm measurement
Bamboo clump
sample
ID
A (year) Nculm D1 (cm) / H1 (m) D2 (cm) / H2 (m) D3 (cm) /
H3 (m)
3rd
clump 1
2
3
4
5
5th
clump 1
2
3
4
5

7. Clump based measurement
Bamboo clump sample
ID
Nculm Gclump (cm) Hclump (m)
1
2
3
4
5
6

8. Questions and Answer
• Recording sheets

9. Data collection for the development of
allometric equations: predictors
• Predictor is variable that is responsive
to the change of biomass (correlation
with biomass)
• Diameter at breast high (cm)
• Height of culm/clump (m)
• Girth of clump
• Diameter of clump
• Basal area
• Number of culms
• Non-bamboo/shrubs
• Crown area
• Height of shrub
• Diameter at base

10. Collection of samples for development of
allometric equation- Culm based
assessment
• 3 – 5 plots per site
• 10 – 15 culms collected per plot
• 2-3 culms collected per age group
• Age groups: 1 year, 2 years, 3 years, 4 years and
above 4 years

11. Collection of samples for development of
allometric equation- Culm based
assessment
• Weight all culms (culm, leaves, branches)
• Take 3 portions of culm (bottom, middle and top)
• Each portion is about 100 gram
• Take 100-300 gram of leaves (Young to old)
• Take 100 – 300 gram of branches (young to old)
Note: Record all variables with one decimal place

12. Data for development of allometric
equations (Culm based assessment)
Plot ID: Coordinate: X: Y:
Plot size: Plot shape: Species of bamboo: Forest type:
Average culm height (m): Gclump (cm) (if applicable):
Average rainfall (mm year-1
): Average temperature (0
C year-1
):
Soil type: Soil colour: Soil thickness (cm):
Slope (degree): Altitude (m):
Recorded by: Date:
Culm
ID
Culm age (A, year) Culm diameter at
breast height (D, cm)
Culm
ID
Culm age (year) Culm diameter
(D, cm)

13. Collection of samples for development of
allometric equation (Culm based
assessment)
Bamboo
plant
sample
ID
D (cm) H (m) A (year) Fresh
biomass of
culm (kg)
Fresh
biomass of
branches (kg)
Fresh
biomass of
leaves (kg)
Fresh mass
of culm
samples (g)
Fresh mass
of branch
samples (g)
Fresh mass
of leaf
samples (g)

14. Collection of data for development of
allometric equation- Clump based samples
• Select 40 – 50 clumps per site
• Measure Gclump
• Measure the height of clump
• Count number of culms per age group
• Select 2-3 culms per age group
• Measure weight and take sample

15. Data for development of allometric
equation- Clump based samples
Bamboo
clump
sample
ID
Gclump (m) Hclump (m) Nculm Fresh
biomass of
total culms
(kg)
Fresh
biomass of
total
branches (kg)
Fresh
biomass of
total leaves
(kg)
Fresh mass
of culm
samples (g)
Fresh mass
of branch
samples (g)
Fresh mass
of leaf
samples (g)
Plot size: Plot shape: Species of bamboo: Forest type:
Average culm height (m): Gclump (cm) (if applicable):
Average rainfall (mm year-1
): Average temperature (0
C year-1
):
Soil type: Soil colour: Soil thickness (cm):
Slope (degree): Altitude (m):
Recorded by: Date:

16. Below ground biomass measurement-
running and long necked clumping bamboo
• Measuring within quadrat
• Area of quadrat = plot area/ number of culms
• Collect and weight rhizome, coarse roots and fine
roots separately
• Take 100 – 300 gram samples of rhizome
• Take 100 – 300 gram samples of coarse roots
• Take 100 – 300 gram samples of fine roots

17. Below ground biomass measurement- Culm
based assessment
Bamboo
plant
sample
ID
D
(cm)
H
(m)
A (year) Fresh
biomass
of
rhizomes
(kg)
Fresh
biomass
of coarse
roots
(kg)
Fresh
biomass
of fine
roots
(kg)
Fresh
mass of
rhizome
samples
(g)
Fresh
mass of
coarse
root
sample
s (g)
Fresh
mass of
fine
root
sample
s (g)

18. Below ground biomass measurement-
clump based assessment
Bamboo
clump
sample
ID
Gclump
(m)
Hclump
(m)
Nculm Fresh
biomass
of total
rhizomes
(kg)
Fresh
biomass
of total
coarse
roots
(kg)
Fresh
biomass
of total
fine
roots
(kg)
Fresh
mass of
rhizome
samples
(g)
Fresh
mass
of
coarse
root
sample
s (g)
Fresh
mass
of fine
root
sample
s (g)

19. Laying out quadrats for non bamboo and
litter in circular plots

20. Non-bamboo measurement
Shrubs
sample ID
Species (if
applicable)
CD (cm) H (cm) D0 (mm) Fresh
biomass of
plants (g)
Fresh
mass of
plant
sample
s (g)
North to
south
East to
west
• Measuring 4 quadrat per plot

21. Litter
• Measuring in 0.5 m2
plot, total 30- 50 plots/ site
• Weight on site and take 100 – 300 gram samples
Litter subplot
sample
ID
Fresh Bli (g) LD (mm) Fresh mass of litter sample (g)

22. Managing samples
• Every sample will be dry in oven 105 o
C
• Spread sample evenly in the oven until constant
weight to obtain fresh to dry ratio
• Ratio= Dry sample/ fresh sample

23. Culm based assessment data set
• Data set example
Plot
ID
Plant
ID
D
(cm)
H
(m)
A
(year)
Fresh
biom
ass of
culm
(kg)
Fresh
biom
ass of
branc
h (kg)
Fresh
biom
ass of
leaf
(kg)
Ratio
culm
Ratio
branch
Ratio
leaf
Bcu
(kg)
Bbr
(kg)
Ble
(kg)
AGBbam
boo (kg)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

24. Clump based assessment data set
Bambo
o
clump
sample
ID
Dclump
(m)
Hclump
(m)
Nculm Fresh
bioma
ss of
total
culms
(kg)
Fresh
biomas
s of
total
branch
es (kg)
Fresh
bioma
ss of
total
leaves
(kg)
Rati
o of
culm
Ratio
of
branc
h
Rati
o of
leaf
Bcuclu
mp
(kg)
Bbrclu
mp
(kg)
Bleclu
mp
(kg)
AGBcl
ump
(kg)
1 2 3 4 5 6 7 8 9 10 11 12 13 14

25. Below Ground Biomass data set (culm
based assessment)
• Available RSR AGB vs BGB
Plot
ID
Bambo
o plant
sample
ID
D
(cm)
H
(m)
A
(year)
Fresh
biomass
of
rhizome
s (kg)
Fresh
biomas
s of
coarse
roots
(kg)
Fresh
biom
ass of
fine
roots
(kg)
Ratio of
rhizom
e
Ratio
of
coarse
root
Ratio
of
fine
root
Brh
(kg)
Bco
(kg)
Bfi
(kg)
BGBb
amboo
(kg)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

26. Below Ground Biomass data set (clump
based assessment)
Bambo
o
clump
sample
ID
Dclum
p (m)
Hclum
p (m)
Ncul
m
Fresh
biomas
s of
total
rhizom
es (kg)
Fresh
biomas
s of
total
coarse
roots
(kg)
Fresh
bioma
ss of
total
fine
roots
(kg)
Ratio
of
rhizom
e
Ratio
of
coars
e
root
Rati
o of
fine
root
Brhclu
mp
(kg)
Bcoclu
mp
(kg)
Bficlum
p (kg)
BGBcl
ump
(kg)
1 2 3 4 5 6 7 8 9 10 11 12 13 14

27. Non bamboo biomass data set (shrubs)
Shrub
sample
ID
Species (if
applicable)
(cm) CA (cm2
) H (cm) D0 (mm) Fresh
biomass of
plant (kg)
Fresh-to-
dry ratio
mass
AGBnon-
bamboo (kg)
1 2 3 4 5 6 7 8 9

28. Litter data set
Litter
subplot
sample
ID
Fresh Bli (g) LD (mm) Fresh-to-dry litter
mass ratio
Bli (kg) per ha
1 2 3 4 5

29. Development of allometric equations
• 70 - 80% of the data set for developing equation and
20 – 30% for validation
• R code is developed for development and validation
of equations
– Box 1: log(AGB) = a + b × log (D)
– Box 2: AGB = α × Dβ
– Box 3 comparing two models
– Box 6: Monte Carlo validation
• Existing equations

30. Group discussion
• Review tables
• Comments and questions
• What data will you collect

31. Data to be collected
Data to be collected Yes No
Dculm
Hculm
Gclump
Data set for AGB (culm based)
Data set for AGB (clump based)
Data set for BGB (culm based)
Data set for BGB (clump based)
Data set for Non bamboo biomas
Data set for litter

32. THANK YOUTHANK YOU
Trinh Thang Long
ttlong@inbar.int
www.inbar.int