Measuring carbon stock in peat soils - Balai Penelitian Tanah

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Histosol. Peat soil. Land cover. The vegetation on the Earth’s surface, such as forests, half-open woodlands, grasslands and open fields. Land use. This term refers to the classification of land-cover types based on human activities, such as plantation forestry, tree crops, field crops, urban and conservation areas (please note that a term such as ‘forest’ can refer to both land cover and land use, depending on context). Necromass (dead organic matter). The weight of dead organisms (mostly plants) in a unit land area, usually expressed as dry weight in t/ha or Mg/ha. Aboveground necromass includes dead trees (standing or on the surface), the litter layer of dead leaves, twigs and branches and crop residues. Belowground necromass includes dead roots and crop residues buried by soil tillage that have not yet been converted into soil organic matter. Organic matter. Material derived from living matter that can decompose or be the result of decomposition or materials consisting of organic compounds. Peat (as substrate). Soil dominated by partially decomposed plant residues, with an organic C content of more than 18% (organic matter content of more than 30%). Peat soil (as soil type). Soils with at least 50 cm of peat. Peat soil has a thickness ranging from 0.5 m (by definition) to more than 15 m. Large areas of tropical peats have thicknesses ranging 2–8 m. Peatland (as ecosystem). A land system dominated by peat soils. Peatland is usually found in wetland conditions but not all wetlands are peatlands. Mosses, grasses, shrubs and trees can contribute to the formation of peat in water-saturated conditions, with the term ‘bog’ reserved for peatland dominated by moss. Sapric. Advanced stage of peat decomposition into organic-matter-rich ‘earth’ without visible fibres (Table 4). xi
xii Soil bulk density (BD). Dry weight of soil per unit volume (including volume of soil solids and pores filled with gas and water). Soil organic carbon content (C org ). The mass of carbon per unit weight of soil. Its units are percentage by weight or gram per kilogram (g organic C/kg soil), tonne per tonne (t /t) or megagram per megagram (Mg/Mg). If laboratory analysis only provides data on organic matter content (for example, by the method of loss on ignition (LOI)), the Corg content of the soil is normally assumed to be 1/1.724 of soil organic matter content. If the peat soil has an organic matter content of 98% then the C org = 98%/1.724 = 57% = 570 g/kg = 0.57 Mg/Mg = 0.57 t/t or simply 0.57. Soil organic matter content. The mass of soil organic matter per unit weight of dry soil. Usually expressed as percentage by weight or gram per kilogram (g organic matter/kg dry soil) tonne per tonne (t /t) or megagram per megagram (Mg/Mg). Organic matter content of 98% by weight = 980 g/kg = 0.98 Mg/Mg = 0.98 t/t.
Page 1 and 2: Practical guidelines Measuring carb
Page 3 and 4: Citation Agus F, Hairiah K, Mulyani
Page 6 and 7: Figures Figure 1. Schematic process
Page 8: Tables Table 1. Some differences in
Page 11: x eruptions. It is captured from th
Page 15 and 16: xiv the largest area of tropical pe
Page 18 and 19: Background Soil is one of the three
Page 24: The exposure of woody roots abovegr
Page 27 and 28: 10 Agus et al. (2011) BD values of
Page 30: Peat soils differ in properties fro
Page 33 and 34: 16 Agus et al. (2011) for mapping m
Page 35 and 36: 18 Agus et al. (2011) 1-2 m 2-3 m 2
Page 37 and 38: 20 Agus et al. (2011) 3.2.2. Peat s
Page 39 and 40: 22 Agus et al. (2011) 3.2.3. Proced
Page 41 and 42: 24 Agus et al. (2011) 8) Store the
Page 43 and 44: 26 Agus et al. (2011) 3.2.4. Undist
Page 45 and 46: 28 Agus et al. (2011) Note: The mai
Page 47 and 48: 30 Agus et al. (2011) Determine the
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46 Agus et al. (2011) Analyzer (IRG
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48 Agus et al. (2011) increase of C
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50 Agus et al. (2011) S = Sequestra
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56 Agus et al. (2011) Hairiah K, Ra
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Measuring carbon stock in peat soils - Balai Penelitian Tanah

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