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Carbon pool measurement of a growing stock final


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Carbon pool measurement of a growing stock final

  1. 1. CARBON POOL MEASUREMENT OF A GROWING STOCK Prepared by: Group 2 7th Semester B.Sc(hons) in Forestry Institute of Forestry And Environmental Sciences, Chittagong University
  2. 2. OBJECTIVES:  To find out the total carbon stock of a growing stock
  3. 3. LOCATION The plantation is located beside the ladies block of Masterda Surya Sen Hall, Chittagong University. Plantation type: mixed plantation Species composition: 1. Dipterocarpus turbinatus 2. Hopea odorata 3. Chukrasia tabularis
  4. 4. METHODOLOGY Sampling procedure: Purposive sampling Total area: 1 ha Sample size: 900m2 Group B was sub divided into 4 groups and each group was given a plot size of 15m×15m
  5. 5. CONTINUED…. To calculate the total carbon stock of a growing stock we need to calculate 1. Above ground biomass (AGB) 2. Below ground biomass (BGB) 3. Biomass of undergrowth vegetation 4. Litter fall and dead organic matters 5. Soil carbon
  6. 6. CONTINUED…. 1.Above ground biomass Above ground tree biomasses are calculated using allometric equations. Dbh measurement: Dbh of different trees are measured using diameter tape. Height measurements: To calculate the height of a tree we used Spiegel relaskope. With Spiegel we took a bottom reading and a top reading for each tree and Tree height is calculated using the following formula: Tree Height= × Distance
  7. 7. CONTINUED…. 2. below ground biomass: Below ground biomasses are calculated using 20% of Above Ground Biomass amount. 3. Undergrowth biomass measurement: To measure different undergrowth biomasses we took total 4m2 plot from 900m2 plot. ( 1m×1m from each plot)
  8. 8. CONTINUED… 4. Litter fall and dead organic matters: No litter fall and dead organic matters were found due to litter collection by local peoples. 5. Soil carbon: For soil carbon measurement we used gravimetric or loss on ignition method. 8 samples (4 samples from top soil and 4 samples from sub soils) from each sub plot were taken. Samples were taken from each corner of the sub plots.
  9. 9. RESULTS: Calculated biomass: Type Amount(kg/ha) Above ground biomass 295667.50 Below ground biomass 59133.50 Undergrowth biomass 2900.00 Litter fall and dead organic matters Nil Total Biomass 357701.00
  10. 10. CARBON CONTENT: Type Amount (tons/ha) Above ground biomass 147.8338 Below ground biomass 29.56675 Undergrowth biomass 1.07300 Litter fall and dead organic matters Nil Soil carbon 27.96 Total Carbon Content 206.4336
  11. 11. APPENDICES: 1. Allometric equation used: Y= 42.69-12.8×D+1.424×D2 ; >5 cm diameter. (brown et. al. 1989) Here, Y= Above ground biomass D= Diameter
  12. 12. CONTINUED… 2. Conversion factors for below ground biomass: BGB= AGB×0.2; Santantonio, Hermann and Overton (1997) Here, BGB= Below ground Biomass AGB= Above ground Biomass
  13. 13. CONTINUED… 3. Biomass to carbon conversion factor: The average carbon content is generally 50% of the tree’s total volume. (Richard, 1992)
  14. 14. CONTINUED… 4. Determining carbon in undergrowth vegetation: Wc= C(%)= × × 100 Here, G = Green weight D = Dry weight Wc= Water content
  15. 15. THANK YOU …for your patience