Labile Carbon and Carbon Management Index in Peat Planted with Various Crops

Nahrawi, Hafsah; Husni, M. H. A.; Radziah, O.

doi:10.1080/00103624.2012.681736

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Labile (non-humified carbon and MBC) and stable (humic and fulvic acid carbon) fraction contents were ordered from high to low as follows: hay pasture > hay crop > former vineyard. However, in Malaysia, topsoil labile SOC content (0-15 cm) increased by 18% and 6% after forest were converted to oil palm plantation and pineapple orchard, respectively (Nahrawi et al, 2012). In Sergipe, Brazil, SOC content and active humic acid concentration in surface soil did not differ between a 12-year-old integrated coconut plantation and an adjacent remnant native Atlantic Forest (Guimarães et al, 2013).…”

Section: Introductionmentioning

confidence: 90%

Effect of Wetland Reclamation on Soil Organic Carbon Stability in Peat Mire Soil Around Xingkai Lake in Northeast China

et al. 2018

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Content and density of soil organic carbon (SOC) and labile and stable SOC fractions in peat mire soil in wetland, soybean field and rice paddy field reclaimed from the wetland around Xingkai Lake in Northeast China were studied. Studies were designed to investigate the impact of reclamation of wetland for soybean and rice farming on stability of SOC. After reclamation, SOC content and density in the top 0-30 cm soil layer decreased, and SOC content and density in soybean field were higher than that in paddy field. Content and density of labile SOC fractions also decreased, and density of labile SOC fractions and their ratios with SOC in soybean field were lower than that observed in paddy field. In the 0-30 cm soil layer, densities of labile SOC fractions, namely, dissolved organic carbon (DOC), microbial biomass carbon (MBC), readily oxidized carbon (ROC) and readily mineralized carbon (RMC), in both soybean field and paddy field were all found to be lower than those in wetland by 34.00% and 13.83%, 51.74% and 35.13%, 62.24% and 59.00%, and 64.24% and 17.86%, respectively. After reclamation, SOC density of micro-aggregates (< 0.25 mm) as a stable SOC fraction and its ratio with SOC in 0-5, 5-10, 10-20 and 20-30 cm soil layers increased. SOC density of micro-aggregates in the 0-30 cm soil layer in soybean field was 50.83% higher than that in paddy field. Due to reclamation, SOC density and labile SOC fraction density decreased, but after reclamation, most SOC was stored in a more complex and stable form. Soybean farming is more friendly for sustainable SOC residence in the soils than rice farming.

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Section: Introductionmentioning

confidence: 90%

Effect of Wetland Reclamation on Soil Organic Carbon Stability in Peat Mire Soil Around Xingkai Lake in Northeast China

et al. 2018

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“…Different tree plantations could also differ in the quantity and quality of SOC input to the soil. In Malaysia, topsoil LOC content (0e15 cm) increased by 18% and 6% after forest conversion to oil palm plantations and pineapple orchards, respectively (Nahrawi et al, 2012). In Sergipe, Brazil, SOC content and active humic acid concentration in surface soil did not differ between a 12-year-old integrated coconut plantation and an adjacent remnant native Atlantic Forest (Guimarães et al, 2013).…”

Section: Organic C Losses In Top and Subsoil Following Land Use Changementioning

confidence: 98%

“…Unfortunately, most studies on the effect of LULUC on SOC have focused on the topsoil layer (0e20 cm) being the layer of soil containing the highest levels of SOC and the greatest microbial activity (e.g., Saha et al, 2011;Nahrawi et al, 2012;Wang et al, 2013;Umrit et al, 2014). In contrast, the response of SOC and its fractions in subsoil to land use change has received less attention (Rumpel and K€ ogel-Knabner, 2011;Schmidt et al, 2011;Harper and Tibbett, 2013), mainly because subsoil SOC has been assumed to be old, stable, inert and insensitive to LULUC.…”

Section: Introductionmentioning

confidence: 99%