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Table 1 Information on the eight forests across three climatic zones in China and associated soil properties

From: Changes in soil organic carbon contents and fractionations of forests along a climatic gradient in China

  Dinghu Mountains (Subtropical climate) Baotianman (Warm temperate climate) Changbai Mountains (Cool temperate climate)
Broadleaf Mixed Conifer Broadleaf Mixed Broadleaf Mixed Conifer
Latitude 23°10′06′′–23°10′16′′N 23°09′21′′–23°11′30′′N 23°07′15′′–23°08′33′′N 33°29′38′′–33°30′58′′N 33°29′30′′–33°31′02′′N 42°23′54′′–42°24′33′′N 42°23′24′′–42°24′33′′N 42°11′16′′–42°11′28′′N
Longitude 112°32′10′′–112°32′36′′E 112°30′39′′–112°33′41′′E 112°29′44′′-112°31′37′′E 111°55′58′′–111°56′12′′E 111°55′51′′–111°56′12′′E 128°05′58′′–128°06′37′′E 128°05′11′′–128°06′05′′E 128°10′03′′–128°10′28′′E
Altitude (m) 250–350 50–250 50–150 1380–1400 1330–1360 729–781 734–774 1076–1111
MAT (°C) 20.7 20.9 20.9 15.1 15.1 3.6] 3.3 −0.5
MAP (mm) 1996 1990 1990 855 855 689 689 854
Age (yr) 400 85 85 80 60 45 200 160
pH 4.2 3.8 4.0 4.6 4.6 5.5 5.3 4.6
SOC (g∙kg−1) 56.2 62.1 54.9 59.5 70.1 90.35 104.2 73.0
STN (g∙kg−1) 1.9 1.0 0.9 1.7 2.6 6.5 8.5 3.8
MR (μg·kg−1·h−1) 0.705 0.565 0.485 0.476 0.373 0.354 0.347 0.242
Litterfall (t∙ha∙yr.−1) 3.50 7.69 9.83 4.56 5.13 6.02 6.43 5.51
Fine root (t∙ha−1) 65.9 53.5 50.0 31.4 24.2 28.8 66.0 42.5
Sand (%) 27.6 28.7 44.7 24.0 6.0 7.4 6.1 45.1
Siltcoarse (%) 47.2 52.1 35.9 59.4 79.9 81.9 64.8 39.9
Siltfine (%) 11.4 14.4 10.9 3.5 3.2 4.3 15.3 3.6
Clay (%) 13.7 4.8 8.4 13.0 10.9 6.4 13.9 11. 4
Fe (mg∙kg−1) 120.7 142.4 61.7 67.3 47.7 23.3 22.8 83.6
Soil type Ferralic cambisols Dystric cambisols Eutric cambisols
References Wen et al. 1998; Yan et al. 2001; Mo et al. 2004; Zhou et al. 2005; Zhang et al. 2013 You et al. 2014; Wang et al. 2015; You et al. 2016 Wang et al. 2004; Liu et al. 2009; Yang et al. 2010; Zheng et al. 2011; Hu et al. 2014
  1. Note: MAT mean annual temperature, MAP mean annual participation, SOC soil organic carbon content, STN soil total nitrogen content, MR soil microbial respiration; Litterfall, annual litterfall, Fe effective Fe content