Characteristics and Influencing Factors of CH4 and CO2 Emissions in Baiyangdian Wetland

doi:10.11924/j.issn.1000-6850.casb2021-0341

Abstract

Abstract:

This study explored the carbon emissions and their influencing factors in Baiyangdian wetland, in order to provide a basis for the carbon management. Temporal and spatial variations of methane (CH₄) and carbon dioxide (CO₂₎ emission fluxes in Baiyangdian wetland were measured using the static closed chamber gas chromatography technique. The temporal variations show that the CH₄ and CO₂ emission fluxes increase first then decrease from May to October, and the daily variation of CH₄ and CO₂ emission fluxes is relatively large in July. The spatial variation of CH₄emission fluxes is in the following order: ecotone zone with reeds>terrace zone with reeds>water zone>terrestrial zone. However, the CO₂ emission fluxes show the opposite results. Besides that, CH₄ and CO₂ emission fluxes are significantly and positively correlated with temperature and soil TN content (P<0.05). Under the same environmental condition, CH₄ and CO₂ emission fluxes have significantly positive correlations (P<0.05). In sum, CH₄ and CO₂ emission fluxes show significant temporal and spatial variation, and are influenced by air temperature, soil N and reeds biomass.

Key words: Baiyangdian wetland, methane emissions, carbon dioxide emissions, influencing factors

CLC Number:

X171.1

ZHAO Ying, WANG Fei. Characteristics and Influencing Factors of CH₄ and CO₂ Emissions in Baiyangdian Wetland[J]. Chinese Agricultural Science Bulletin, 2022, 38(2): 63-70.

Figures/Tables 7

References 42

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相关系数	ER(CO₂)	TR(CO₂)	W(CO₂)	T(CO₂)
ER(CH₄)	0.943^**	0.883^*	0.934^**	0.594
TR(CH₄)	0.933^**	0.815^*	0.875^*	0.509
W(CH₄)	0.648	0.927^**	0.821^*	0.765
T(CH₄)	0.889^*	0.861^*	0.917^*	0.497

相关系数	ER(CO₂)	TR(CO₂)	W(CO₂)	T(CO₂)
ER(CH₄)	0.943^**	0.883^*	0.934^**	0.594
TR(CH₄)	0.933^**	0.815^*	0.875^*	0.509
W(CH₄)	0.648	0.927^**	0.821^*	0.765
T(CH₄)	0.889^*	0.861^*	0.917^*	0.497

Characteristics and Influencing Factors of CH₄ and CO₂ Emissions in Baiyangdian Wetland

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