[Relationship between CH4 and N2O emissions and related microorganism populations in paddy soils under different water management regimes].
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.
Yue
Jin
J
Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. jyuemail@yahoo.com.cn
Huang
Guohong
G
Liang
Wei
W
Jiao
Zhihua
Z
Liang
Zhanbei
Z
Wang
Chenrui
C
Shi
Yi
Y
D008697:Methane / Q000032:analysis* / Q000378:metabolism; D009609:Nitrous Oxide / Q000032:analysis* / Q000378:metabolism; D012275:Oryza / Q000254:growth & development*; D012044:Regression Analysis; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D014867:Water
D012987:Soil; D014867:Water; D009609:Nitrous Oxide; D008697:Methane