TY - JOUR
T1 - Soil carbon and nitrogen dynamics during conversion of agricultural lands to natural vegetation in central Korea
AU - Son, Yowhan
AU - Yang, Soo Young
AU - Jun, Young Chul
AU - Kim, Rae Hyun
AU - Lee, Yoon Young
AU - Hwang, Jung Ok
AU - Kim, Jong Sung
PY - 2003
Y1 - 2003
N2 - Changes in land use can affect the distribution and cycling of soil organic matter and nutrients. Soil organic carbon (C) and nitrogen (N) concentrations, soil CO2 evolution, litter decomposition, and soil N availability under the three types of conversion of agricultural lands to natural vegetation (rice field conversion to forest, crop field conversion to shrub, and indigenous forest) in central Korea after 20 years of fallow were compared. There was no significant change in soil organic C and N concentrations among the three types at the three soil depths, and soil organic C and N increases were confined to the topsoil (0 - 10 cm). Soil CO2 evolution tracked seasonal soil temperature, however, there was no difference among conversion types. Annual soil CO2 evolution (Mg CO2/ha/yr) was 36.0 ± 3.7 for the rice field conversion to forest site, 33.8 ± 4.1 for the crop field conversion to shrub site, and 40.7 ± 4.1 for the indigenous forest site, respectively. After decomposing for one year, 55.8% for the rice field conversion site, 64.9% for the crop field conversion site, and 66.3% for the indigenous forest site of the original leaf litter mass remained. The soil moisture condition seemed to limit the rate of decomposition in the study area. Resin NO3 - -N concentration was higher at the rice field conversion site.
AB - Changes in land use can affect the distribution and cycling of soil organic matter and nutrients. Soil organic carbon (C) and nitrogen (N) concentrations, soil CO2 evolution, litter decomposition, and soil N availability under the three types of conversion of agricultural lands to natural vegetation (rice field conversion to forest, crop field conversion to shrub, and indigenous forest) in central Korea after 20 years of fallow were compared. There was no significant change in soil organic C and N concentrations among the three types at the three soil depths, and soil organic C and N increases were confined to the topsoil (0 - 10 cm). Soil CO2 evolution tracked seasonal soil temperature, however, there was no difference among conversion types. Annual soil CO2 evolution (Mg CO2/ha/yr) was 36.0 ± 3.7 for the rice field conversion to forest site, 33.8 ± 4.1 for the crop field conversion to shrub site, and 40.7 ± 4.1 for the indigenous forest site, respectively. After decomposing for one year, 55.8% for the rice field conversion site, 64.9% for the crop field conversion site, and 66.3% for the indigenous forest site of the original leaf litter mass remained. The soil moisture condition seemed to limit the rate of decomposition in the study area. Resin NO3 - -N concentration was higher at the rice field conversion site.
KW - Carbon
KW - Conversion of agricultural lands
KW - Natural vegetation
KW - Nitrogen
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U2 - 10.1081/CSS-120021293
DO - 10.1081/CSS-120021293
M3 - Article
AN - SCOPUS:0037983898
VL - 34
SP - 1511
EP - 1527
JO - Communications in Soil Science and Plant Analysis
JF - Communications in Soil Science and Plant Analysis
SN - 0010-3624
IS - 11-12
ER -