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Estimation of rate transfer from dead rootlets to organic matter in acid forest soils


, : Estimation of rate transfer from dead rootlets to organic matter in acid forest soils. Developments in agricultural and managed forest ecology4(24): 280-284

Transfer rate of dead beech and spruce rootlets to organic matter derived from roots, OMDR, was measured following successive coring of small plots without trees, and isolated by a ditch at the start of the experiment. In the case of spruce, very fine roots (d < 1 mm) and fine roots (1 < d < 5 mm) disappear within two years, with mean monthly transfer rates of S = 5.3 percent and S = 5.02 percent respectively. In case of beech rootlets, there is a lag time of nearly one year, and tailing after two years, S values were respectively S = 2.5 percent and S = 9.1 percent for very fine roots and fine roots. The author insists upon the difference which exists between transfer rate to OMDR and soil organic matter mineralization rate.

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