Pedosphere 6(2): 175--181, 1996
ISSN 1002-0160/CN 32-1315/P
©1996 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effects of nitrogen fertilizer, soil moisture and temperature on methane oxidation in paddy soil |
| YAN Xiao-Yuan and CAI Zu-Cong |
| LMCP, Institute of Soil Science, Academia Sinica, Nanjing 210008 (China) |
| ABSTRACT |
| Effects of nitrogen fertilizer, soil moisture and temperature on methane oxidation in paddy soil were investigated under laboratory conditions. Addition of 0.05 g N kg-1 soil as NH4Cl strongly inhibited methane oxidation and addition of the same rate of KCl also inhibited the oxidation but with more slight effect, suggesting that the inhibitory effect was partly caused by increase in osmotic potential in microorganism cell. Not only NH+4 but also NO-3 greatly affected methane oxidation. Urea did not affect methane oxidation in paddy soil in the first two days of incubation, but strong inhibitory effect was observed afterwards. Methane was oxidized in the treated soil with an optimum moisture of 280 g kg-1, and air-drying inhi-bited methane oxidation entirely. The optimum temperature of methane oxidation was about 30 ℃ in paddy soil, while no methane oxidation was observed at 5 ℃ or 50 ℃. |
| Key Words: methane oxidation, nitrogen fertilizer, paddy soil, soil moisture, temperature |
| Citation: Yan, X. Y. and Cai, Z. C. 1996. Effects of nitrogen fertilizer, soil moisture and temperature on methane oxidation in paddy soil. Pedosphere. 6(2): 175-181. |
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