華南丘陵區(qū)針葉林和果園地表ch4通量的日變化-資料下載頁(yè)
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【正文】 any [J]. Soil Biology and Biochemistry, 2001, 33:145153.[17] PRICE S J, SHERLOCK R R, KELLIHER F M, et al. Pristine New Zealand forest soil is a strong methane sink[J]. Global Change Biology, 2003,10:1626[18] BORKEN W, BEESE F. Methane and nitrous oxide fluxes of soils in pure and mixed stands of European beech and Norway spruce [J]. European Journal of Soil Science, 2006, 57:617625.Diurnal variations of CH4 fluxes from soil surface of plantation and orchard in a hilly area of south ChinaLiu Hui1, 2, Zhao Ping21. School of Tourism and Environment, Guangdong University of Business Studies, Guangzhou 510320, China。 2. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, ChinaAbstract: Diurnal variation of CH4 flux was measured using dark static chambers for 21 month in two typical landuse types in a hilly area of South China: plantation dominated by Pinus massoniana and orchard dominated by Dimocarpus longan Lour. There were two plots at both sites respectively: one was covered with litters on the surface soil and the other had no litters. The result showed that these two landuse types were sinks of CH4 to the atmosphere as a whole, but were the sources of CH4 occasionally in rainy season. Diurnal variations of CH4 fluctuated with no rule. Strong CH4 sink appeared in October and November and weak from June to September. The average diurnal CH4 flux ranged from ~ mgm2h1 in the pine plantation and ~ mgm2h1 in the orchard. CH4 flux had no clear correlation with temperature. Precipitation affected CH4 flux greatly with higher flux in dry season (October—March) and lower in rainy season (April—September). Litter layer and vegetation types had no distinct impact on CH4 uptake by soil. Key words: Land use。 CH4 flux。 Litter。 Diurnal variation
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