The Mass Loss and Humification of Stumps and Roots in Masson Pine Plantations Based on Log File Records.

E4/E6 values for coarse woody debris and different root systems initially decreased during the first 3–4 years then increased until 8–9 years of decay, finally showing a decreasing trend. ΔlogK ΔlogK values (the slopes of UV-visible spectra of ratio of absorbance at 400 nm and 600 nm on a logarithmic scale, which is an index of the degree of humification) of the stump system decreased, with lower ΔlogK values found during the later phase ( Table 6 ) and a very significant negative relationship between ΔlogK values and years of decay ( Table 2 ).

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