Sensitivity of soil CO2 emissions to fertilizer nitrogen species: urea, ammonium sulfate, potassium nitrate, and ammonium nitrate

被引：0
|
作者：
Woo-Jung Choi
Miwa Matushima
Hee-Myong Ro
机构：
[1] Chonnam National University,Department of Rural & Biosystems Engineering
[2] Chiba University,Graduate School of Horticulture
[3] Seoul National University,Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences
来源：
Journal of the Korean Society for Applied Biological Chemistry | 2011年 / 54卷 / 6期
关键词：
carbon dioxide emission; first-order kinetics; microbial nitrogen preference; soil heterotrophs; soil organic carbon;
D O I：
10.1007/BF03253193
中图分类号：
学科分类号：
摘要：
Batch aerobic incubation experiment was conducted using an acidic loam soil for 110 days with five N treatments: no N [Control], (NH2)2CO [U], (NH4)2SO4 [AS], KNO3 [PN], and NH4NO3 [AN]. Cumulative amount of CO2 emission (mg · C/kg) was 1066.5 [U], 951.4 [AS], 753.8 [PN] and 847.0 [AN] during the entire incubation period. Sensitivity of soil organic carbon (SOC) mineralization (expressed as the ratio of the amount of N fertilization-induced CO2-C emission to a given amount of N addition) was greatest in U followed by AS, AN, and PN treatments, suggesting that application of NO3−-based fertilization would be helpful in reducing fertilizer-induced SOC mineralization in agricultural soils.
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页码：1004 / 1007
页数：3
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