An incubation expericment with typical Deyeuxia angustifolia meadow soil and artificial forest soil in the Sanjiang plain was conducted under different soil C/N (Ⅰ: 9-10, Ⅱ:11-12, Ⅲ: 13-16, Ⅳ: 16-22) to examine the responses of soil organic carbon (SOC) mineralization to C/N changes. The result showed that during the period of 36d incubation, the SOC accumulative losses of two kinds of soils under high C/N treatment were about 2.78 and 2.68 times as much as that under low C/N, respectively. SOC mineralization rates for both the two kinds of soils were higher in the first 4 days of incubation, and became stable as the time prolonged. The dynamics of SOC mineralization of two kinds of soil preferably followed the first-order kinetics, and the C0 and C0/SOC values increased exponentially with the increasing of C/N. The regression analysis also found that there were significant linear or conic relationships between the accumulative loss and mineralization rate of SOC and C/N, which explained that C/N was the key factor in affecting the sequestration of SOC in wetland.
DOU Jing-xin, LIU Jing-shuang, WANG Yang, ZHAO Guang-ying
. Effects of Amendment C/N Ratio on Soil Organic Carbon Mineralization of Meadow Marshes in Sanjiang Plain[J]. SCIENTIA GEOGRAPHICA SINICA, 2009
, 29(5)
: 773
-778
.
DOI: 10.13249/j.cnki.sgs.2009.05.773
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