Research Article
Patterns of Biomass and Carbon Allocation across Chronosequence of Chir Pine (Pinus roxburghii) Forest in Pakistan: Inventory-Based Estimate
Table 3
Relationship type, equation, and R2 value of the Pinus roxburghii stands.
| | Age class | Parameters | Relationship type | Equation | R2 value |
| | Young stand | BA & V | Polynomial, quadratic | f = −0.07 + 3.53 ∗ x + 0.86 ∗ x2 | 0.94 | | BA & STBM | Polynomial, quadratic | f = −0.04 + 2.15 ∗ x + 0.52 ∗ x2 | 0.94 | | BA & TBM | Polynomial, quadratic | f = −0.07 + 3.25 ∗ x + 0.80 ∗ x2 | 0.94 | | BA & TCS | Polynomial, quadratic | f = −0.03 + 1.62 ∗ x + 0.40 ∗ x2 | 0.94 | | D & H | Polynomial, quadratic | f = −4.22 + 0.90 ∗ x + -0.00 ∗ x2 | 0.99 |
| | Mature stand | BA & V | Polynomial, quadratic | f = −0.99 + 10.01 ∗ x + 0.09 ∗ x2 | 0.99 | | BA & STBM | Polynomial, quadratic | f = −0.60 + 6.11 ∗ x + 0.05 ∗ x2 | 0.99 | | BA & TBM | Polynomial, quadratic | f = −0.92 + 9.22 ∗ x + 0.08 ∗ x2 | 0.99 | | BA & TCS | Polynomial, quadratic | f = −0.46 + 4.61 ∗ x + 0.04 ∗ x2 | 0.99 | | D & H | Polynomial, quadratic | f = −0.08 + 0.77 ∗ x-0.00 ∗ x2 | 0.99 |
| | Overmature stand | BA & V | Polynomial, quadratic | f = −0.87 + 12.93 ∗ x-0.08 ∗ x2 | 0.99 | | BA & STBM | Polynomial, quadratic | f = −0.53 + 7.88 ∗ x-0.05 ∗ x2 | 0.99 | | BA & TBM | Polynomial, quadratic | f = −0.80 + 11.91 ∗ x-0.08 ∗ x2 | 0.99 | | BA & TCS | Polynomial, quadratic | f = −0.40 + 5.95 ∗ x-0.04 ∗ x2 | 0.99 | | D & H | Polynomial, quadratic | f = 8.65 + 0.45 ∗ x-0.00 ∗ x2 | 0.99 |
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BA = basal area (m2·ha−1), V = volume (m3·ha−1), STBM = stem biomass (t·ha−1), TBM = total biomass (t·ha−1), D = diameter (cm), and H = height (m).
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