4. Carbon storages in DDF and MDF 4.1 Biomass carbon In Table 2 and Fig.2, carbon amounts in plant biomass of DDF were lower than MDF. DDF on sandstone and volcanic rock had amounts of 41.79 and 47.12 Mg ha-1, respectively. Amounts in MDF sandstone (96.56 Mg ha-1) and shale (87.36 Mg ha-1) were higher than DDF. Carbon allocated in various plant organs was in the same trend as the biomass. A. DDF Sandstone: Hiang had the highest carbon storage (19.36 Mg ha-1), followed by G. usitata (5.96), D. tuberculatus (4.17), S. obtusa (3.39), S. siamensis (3.21) and D. oliverli (0.79). Volcanic rocks: Teng had the highest amount (16.0 Mg ha-1), followed by Rang (10.13), Pluang (3.0), X. xylocarpa (2.53), D. assamica (1.41), T. alata (1.21) and Hiang (1.20). B. MDF Sandstone: I. malayana had the highest amount (28.31 Mg ha-1), followed by X. xylocarpa (10.50), T. mucronata (9.46), teak (6.28), C. formosum (3.16), S. pinnata (3.08) and L. duperreana (3.06). Shale: Teak had the highest amount (22.19 Mg ha-1), followed by T. mucronata (10.43), X. xylocarpa (8.97), P. macrocarpus (4.56), S. oleosa (4.10), L. duperreana (2.74) and S. pinnata (2.57). Khamyong et. al. (2014) reported that annual carbon storages in DDF and MDF-DDF in the Center were 1.65 and 2.58 Mg ha-1 yr-1, respectively. In other areas, DDF had carbon of 52.63 Mg ha-1 (Wattanasuksakul, 2012) and 62.0 Mg ha-1 (Pongkhamphanh, 2015). The highest amount of biomass carbon was found in the upper montane forest, 347.91 Mg ha-1, as in 12. 4.2 Soil carbon storages Soil features influence plant growth and production. In Table 3, soil depths and types were different among forest types. DDF soil on sandstone had intermediate deep, Order Ultisols while that on volcanic rock was shallow, Order Entisols/Inceptisols. MDF soil on sandstone was deep, Ultisols, shallow on shale, Inceptisols, and deeper on shale/ limestone, Alfisols/Vertisols. Thus, carbon storages in soils varied between 12.27 and 65.56 Mg ha-1. Table 2 Average carbon amounts in plant biomass in DDF and MDF Forest Parent rock Carbon in biomass (Mg ha-1) type Stem Branch Leaf Root Total DDF Sandstone (n =12) 27.44 + 4.13 7.71 + 1.13 1.03 + 0.19 5.60 +0.92 41.79 + 6.28 Volcanic rocks (n = 24) 30.66 + 9.50 9.63 +3.81 0.97 + 0.27 5.87 +1.63 47.12 +14.88 MDF Sandstone (n = 5) 55.88 + 12.81 25.34 + 10.50 1.16 +0.59 14.17 +3.24 96.56 +25.13 Shale (n = 5) 51.43 + 9.34 21.21 +4.66 1.23 + 66 13.48 +2.67 87.36 +16.83 288 Proceedings of the International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals (SDGs): Policy and Practice 27-29 June 2016, Cha-am, Phetchaburi, Thailand
Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand
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