The High Input of Soil Organic Matter from Dead Tree Fine Roots into the Forest Soil

Table 3

The amount of live, dead, and live + dead fine roots (<1 mm in diameter) and differences on different sampling occasions, annual means, Σ annual increases of fine roots and turnover rate of live, dead, and live + dead fine roots at a fresh/moist coniferous fern forest site at Forsmark.

Sampling number	Live	Dead	Live + dead
(1)	317 ± 196	226 ± 88^a	543 ± 205
(2)	113 ± 79^a	321 ± 184^a	434 ± 212
(3)	150 ± 112	180 ± 62^b	330 ± 136^a
(4)	248 ± 134^a	299 ± 136^b	546 ± 212^a
Annual means	207	257	463
Σ Annual increases	135	214	216
Turnover rate	0.7	0.8	0.5

Sampling took place on 4 sampling occasions: October 20th, 2004 (1), April 18th, 2005 (2), August 2nd, 2005 (3), and October 28th, 2005 (4). Estimates are given as mean values ±SD (n = 32). Significant increases are marked by a and b. Differences are significant at 𝑃=0.05 (Student’s 𝑡-test).