Relationship between CH4 and N2O emissions and related microorganism populations in paddy soils under different water management regimes
Yue, J.; Huang, G.; Liang, W.; Jiao, Z.; Liang, Z.; Wang, C.; Shi, Y.
Ying Yong Sheng Tai Xue Bao 14(12): 2273-2277
2003
ISSN/ISBN: 1001-9332 PMID: 15031933 Document Number: 566646
Methanogens, methanotrophs, nitrifiers and denitrifiers are the important microorganisms in the production and consumption of CH4 and N2O in soil. In order to understand the microbial processes related to the two greenhouse gases in paddy soil, the four bacteria groups in phaeozem (Hailun) and burozem (Shenyang) were surveyed during rice growth season by using MPN counting technique. The CH4 and N2O emissions were measured with closed chamber method. Two different water management regimes, i.e., continual irrigation and intermittent irrigation, were used for the two paddy soils. The results of multiple regression analysis showed that there was a significantly positive correlation between CH4 emission and methanogen population in both phaeozem and burozem under two water management regimes. In the soil of Shenyang, there was a significantly positive correlation between CH4 emission and methanotropli population. The N2O emission was significantly correlated to the denitrifier population in both phaeozem and burozem under intermittent irrigation, and in the soil of Shenyang, there was a significantly positive correlation between N2O emission and nitrifier population under two water managements.