Estimation of tree biomass, carbon pool and net primary production of an old-growth Pinus kesiya Royle ex. Gordon forest in north-eastern India

Table 2 Total ecosystem, above- and belowground biomass, carbon content and net primary production of an old-growth Pinus kesiya forest in north-eastern India

Component	Biomass (Mg ha⁻¹)	Carbon (Mg C ha⁻¹)	% contribution	Net primary production (Mg ha⁻¹yr⁻¹)	% contribution
Aboveground biomass of Pinus kesiya
- Stem	291.8 ± 33.0	143.0	63.4	9.8	56.0
- Branch	48.2 ± 2.0	23.6	10.5	1.5	8.6
- Twig	7.3 ± 0.5	3.6	1.6	0.7	4.0
- Needle	4.3 ± 0.4	2.1	0.9	0.5	2.9
- Reproductive parts	3.1 ± 0.2	1.5	0.7	0.3	1.7
Aboveground biomass of broad-leaved species	62.2 ± 40.3	30.5	13.5	3.2	18.3
Herbs	0.1 ± 2.5	0.1	0.03	0.0	0.0
Shrubs	0.6 ± 4.6	0.3	0.12	0.0	0.0
Detrital biomass
- Needle	1.0 ± 1.6	0.5	0.2	0.0	0.2
- Twig	0.7 ± 2.4	0.3	0.2	0.0	0.1
- Branch	0.1 ± 1.4	0.1	0.0	0.0	0.1
- Reproductive parts	0.4 ± 2.2	0.2	0.1	0.0	0.2
- Total detrital biomass	2.3 ± 7.6	1.1	0.5	0.1	0.5
Total aboveground biomass	419.7	205.7	91.2	16.1	92.0
Belowground biomass of Pinus kesiya
- Fine roots (<2 mm)	2.4 ± 4.7	1.1	0.5	0.3	1.7
- Coarse roots (>2 mm)	29.4 ± 7.2	13.5	6.4	0.7	4.1
Belowground biomass of others species	9.0 ± 1.7	4.1	1.9	0.4	2.2
- Total forest	460.5	224.4	100.0
- Total soil organic carbon		58.7
Total ecosystem	460.5	283.1	100.0	17.5	100.0
BNPP				0.1	8.0
ANPP				0.9	92.0

ISSN: 1297-966X