Biomass and carbon sequestration in silver oak (Grevillea robusta A.cunn) stands in the midlands of Kerala
By: Geo Basil Paul.
Contributor(s): Vidyasagaran K (Guide).
Material type:
BookPublisher: Vellanikkara Department of Forest Management and Utilisation, College of Forestry 2013DDC classification: 634.9 Online resources: Click here to access online Dissertation note: MSc Abstract: The present study was conducted in College of Forestry, Kerala Agricultural University, Vellanikkara on biomass production and carbon sequestration potential of a 20-year-old Grevillea robusta A. Cunn. plantation standing in the midlands of Kerala. The study reveals the biomass production and productivity, volume production, nutrient export through harvest, and carbon allocation of the above plantation. The mean aboveground biomass production was 197.89 kg tree-1. Whereas on unit area basis it was 62.59 Mg ha-1.The percentage contribution of various components to AGB was in the order: stem wood > branch > leaves > twig. Diameter profoundly influenced the biomass production on per tree basis, whereas on unit area, it was influenced mainly by density. Equations were developed for predicting AGB and biomass components with respect to DBH alone, DBH and total height/bole height together. With respect to the DBH alone as independent variable, for the total AGB, stem, branch, twig the best fit equation was ln Y = a0 + a1* lnD. However, in leaves, the equation selected was ln Y = a0+ a1*lnD + a2*(lnD)2 with high R2 value and lowest Furnival index. For predicting the total volume and bole volume the best fit equation was ln Y = a0 + a1*D + a2*D2. Studies on nutrient dynamics revealed that (N P K) among the components, leaves had the maximum concentration of the nutrients and stem wood the lowest. The nutrient accumulation in various biomass components was found to be in the decreasing order: stem wood > leaves > branch > twig. The maximum nutrients accumulated in stem wood (169.32 kg tree-1) and minimum in twigs (3.94 kg tree-1). Among the nutrients, N accumulated maximum followed by K and P. Stands showed a greater accumulation of nutrients with high potential of nutrient export through harvest. The mean carbon concentration was found to be 46.58 per cent and among components, the leaf portion had the maximum concentration (48.36 %) of carbon and stem wood the lowest (45.67 %). The carbon sequestration potential of 20-year-old G. robusta plantation was 27744 kg ha-1.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
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KAU Central Library, Thrissur Theses | 634.9 GEO/BI (Browse shelf) | Available | 173250 |
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MSc
The present study was conducted in College of Forestry, Kerala Agricultural University, Vellanikkara on biomass production and carbon sequestration potential of a 20-year-old Grevillea robusta A. Cunn. plantation standing in the midlands of Kerala. The study reveals the biomass production and productivity, volume production, nutrient export through harvest, and carbon allocation of the above plantation. The mean aboveground biomass production was 197.89 kg tree-1. Whereas on unit area basis it was 62.59 Mg ha-1.The percentage contribution of various components to AGB was in the order: stem wood > branch > leaves > twig. Diameter profoundly influenced the biomass production on per tree basis, whereas on unit area, it was influenced mainly by density. Equations were developed for predicting AGB and biomass components with respect to DBH alone, DBH and total height/bole height together. With respect to the DBH alone as independent variable, for the total AGB, stem, branch, twig the best fit equation was ln Y = a0 + a1* lnD. However, in leaves, the equation selected was ln Y = a0+ a1*lnD + a2*(lnD)2 with high R2 value and lowest Furnival index. For predicting the total volume and bole volume the best fit equation was ln Y = a0 + a1*D + a2*D2. Studies on nutrient dynamics revealed that (N P K) among the components, leaves had the maximum concentration of the nutrients and stem wood the lowest. The nutrient accumulation in various biomass components was found to be in the decreasing order: stem wood > leaves > branch > twig. The maximum nutrients accumulated in stem wood (169.32 kg tree-1) and minimum in twigs (3.94 kg tree-1). Among the nutrients, N accumulated maximum followed by K and P. Stands showed a greater accumulation of nutrients with high potential of nutrient export through harvest. The mean carbon concentration was found to be 46.58 per cent and among components, the leaf portion had the maximum concentration (48.36 %) of carbon and stem wood the lowest (45.67 %). The carbon sequestration potential of 20-year-old G. robusta plantation was 27744 kg ha-1.
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