喀斯特石漠化地区土壤温室气体的地气交换特征

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (390 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

CO₂,N₂O and CH₄ fluxes from Karst rocky desertification areas in central Guizhou were measured monthly by using static chamber-GC method from June 2006 to May 2007 to investigate the characteristics of seasonal change of greenhouse gas fluxes from soil in Karst region in South China.The results indicate that the soils are the sources of CO₂ and N₂O,but the sink of CH₄.CO₂ fluxes change from 450.8±50.8 to 1281.3±214.7 mg·m²·h^-1,with higher fluxes in summer and autumn,but lower fluxes in spring and winter.N₂O fluxes vary from-25.4±4.1 to 105.8±31.2μg·m^-2·h^-1,with the highest fluxes in summer.The soils absorb N₂O in the air in September,November and December.CH₄ fluxes show no significant changes with the seasons,and they vary from-0.27±0.18 to 0.81±0.26 mg·m^-2·h^-1.The climate conditions have no obvious effects on the fluxes of CO₂ and CH₄.The effects of soil water on N₂O fluxes vary with seasons.The correlation analysis shows that there is significant correlation between soil nitrate content and N₂O/CH₄ fluxes,suggesting nitrate content in soil is the primary driven factor affecting the seasonal change of N₂O and CH₄ fluxes.

Key words： Karst rocky desertification greenhouse gas seasonal variability exchange

Received: 25 August 2009

X511

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Fang
	LIU Cong-qiang
	WANG Shi-lu
	LAN Cui-ling

Cite this article:

LIU Fang,LIU Cong-qiang,WANG Shi-lu, et al. The characteristics of greenhouse flux of soil in Karst rocky desertification regions[J]. , 2009, 28(4): 289-292.

URL:

http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2009/V28/I4/289

[1] Shrestha B M,Sitaula B K,Singh B R,et al.2004.Fluxes of CO₂ and CH₄ in soil profiles of a mountainous watershed of Nepal as influenced by land use,temperature,moisture and substrate addition[J].Nutrient Cycling in Agroecosystems,6g:155-164.
[2] Mosier A R,Duxbury J M,Freney J R,et al.1998.Assessing and mitigating N₂O emissions from agricultural soils[J].Climatic Change,40:7-38.
[3] 徐文彬.1999.箱技术测量土壤痕量气体释放通量的误差因素-以N₂O为例[J].地质地球化学,27(3):111-117.
[4] 刘芳,刘丛强,王仕禄,等.2008.黔中土壤CO₂的释放特征及其影响因素[J].生态环境,17(3):1130-1124.
[5] Cao G M,Tang Y H,Mo W H,et al.2004.Grazing intensity alters soil respiration in an alpine meadow on the Tibetan plateau[J].Soil Biol Biochem,36:237-243.
[6] Liang N S,Nakadai T,Hirano T,et al.2004.In situ comparison of four approach approaches to estimating soil CO₂ efflux in a northern larch (Larix kaempferi Sarg.) forest[J].Agriculture and Forest Meteorol,123:97-117.
[7] Bertrand I,Delfosse O,Mary B.2007.Carbon and nitrogen mineralization in acidic,limed and calcareous agricultural soils:Apparent and actual effects[J].Soil Biol Biochem,39:276-288.
[8] 万国江,王仕禄.2000.我国南方岩溶区和北方黄土区的大气CO₂效应[J].第四纪研究,20(4):305-315.
[9] 刘杏认,董云社,齐玉春.2005.土壤N₂O排放研究进展[J].地理科学进展,24(6):50-58.
[10] 徐文彬,刘广深,刘委屏.2002.降雨和土壤湿度对贵州旱田土壤N₂O释放的影响[J].应用生态学报,13(1):67-70.
[11] 刘广深,徐文彬,洪业汤,等.2002.土壤N₂O释放通量季节变化的主要环境驱动因素的研究[J].矿物学报,22(3):230-234.
[12] Adamsen A P S,King G M.1993.Methane consumption in ternperaturate and subarctic forest soils:Rates,vertical zonation and response to water and nitrogen[J].Applied Environmental Microbiology,59:485-490.
[13] Reay D S,Radajewski S,Murrell J C.2001.Effects of land-use on the activity and diversity of methane oxidizing bacteria in forest soils[J].Soil Biol Biochem,33:1613-1623.
[14] Hütsch B W.1998.Methane oxidation in arable soil as inhibited by ammonium,nitrate,and organic manure with respect to soil pH[J].Soil Biol Biochem,28:27-35.

[1]	. [J]. Ecological Science, 2020, 39(3): 9-.