Seasonal variations of soil microbial biomass,respiration rate and CH4 emission in black earth rice fields

Abstract

Abstract: The measurements of soil microbial biomass C,respiration rate and CH₄ emissions during one rice growth period in black earth rice fields showed that the soil microbial biomass Cand respiration rate were depressed significantly by the application of slow releasing urea at the early stage of rice growth period (P<0.05),but almost not affected by intermittent irrigation.The CH₄ emission was decreased by 32.5% in the intermittent irrigation treatments,but not significantly affected by the application of slow releasing urea,compared to the control.It was significantly related to soil microbial biomass Cin slow releasing urea treatments.

Key words: Black earth, CH₄ emission, Microbial biomass, Soil respiration

CLC Number:

S181

LIANG Wei, YUE Jin, WU Jie, SHI Yi, HUANG Guohong, LIANG Zhanbei . Seasonal variations of soil microbial biomass,respiration rate and CH₄ emission in black earth rice fields[J]. Chinese Journal of Applied Ecology, 2003, (12): 2278-2280.

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Seasonal variations of soil microbial biomass,respiration rate and CH₄ emission in black earth rice fields

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