華南丘陵區(qū)針葉林和果園地表n2o通量的日變化-資料下載頁
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【正文】 ain forest ecosystems in Dinghushan[J]. China Environmental Science, 2004, 24(6):688691.[16] 李志安, 鄒碧, 丁永禎, 等. 森林凋落物分解重要影響因子及其研究進展[J]. 生態(tài)學(xué)雜志, 2004, 23(6):7783.Li Zhian, Zou Bi, Ding Yongzhen, et al. Key factors of forest litter deposition and research progress[J]. Chinese Journal of Ecology, 2004, 23(6):7783.[17] M220。LLER C, STEVENS R, LAUGHLIN R, et al. Microbial processes and the site of N2O production in a temperate grassland soil[J]. Soil Biology and Biochemistry, 2004, 36: 453 4611.Diurnal variations of N2O 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 N2O flux was measured using dark static chambers for 2 years 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 source of N2O to the atmospheren. Diurnal variations of N2O fluctuated with no rule. The average diurnal N2O flux ranged from ~ mgm2h1 in the pine plantation and ~ mgm2h1 in the orchard. Generally, strong N2O source appeared from June to August. Diurnal variation of N2O flux had no clear correlation with temperature. Precipitation affected N2O flux greatly with higher flux in rainy season (AprilSeptember) and lower in dry season (OctoberMarch). Land use types had great effect on N2O flux with higher value in the pine plantation than that in the orchard. Litter layer had no distinct impact on N2O flux in this study. Key words: land use。 N2O flux。 litter。 diurnal variatio
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