華南丘陵區(qū)典型土地利用類型土壤呼吸日變化-資料下載頁
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【正文】 . Vegetation and soil respiration: Correlations and controls[J]. Biogeochemistry, 2000, 48:7191.[19] 吳建國, 張小全, 徐德應. 土地利用變化對土壤有機碳貯量的影響[J]. 應用生態(tài)學報, 2004,15(4): 593599.Wu Jianguo, Zhang Xiaoquan, Xu Deying. Impact of landuse change on soil carbon storage[J]. Chinese Journal of Applied Ecology, 2004,15(4): 593599.[20] ARNOLD K, NILSSON M, H229。NELL B, et al. Fluxes of CO2, CH4 and N2O from drained organic soils in deciduous forests[J]. Soil Biology amp。 Biochemistry, 2005, 37:10591071.[21] LI Y Q, XU M, SUN O J, et al. Effects of root and litter exclusion on soil CO2 efflux and microbial biomass in wet tropical forests[J]. Soil Biology amp。 Biochemistry, 2004, 36:21112114.Diurnal variations of soil respiration of typical landuse types in a hilly area of South China.Liu 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 soil respiration was measured using dark static chambers for two consecutive 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 the diurnal range of soil respiration rate at both sites was small but larger in the rainy season (AprilSeptember) than that in the dry season (OctoberMarch). There was no obvious rule of the peak value of soil respiration rate in the day and night. The average monthly soil respiration rate was in the range of ~ mgm2h1 in the pine plantation and ~ mgm2h1 in the orchard. The lowest value of soil respiration rate appeared in December or January and the highest value appeared in June, July, August or October. It was proved that selecting 9:0011:00 as sampling time for each sampling day was suitable in Heshan hilly area according to the diurnal variation measurement．The effect of soil temperature to the diurnal variation of soil respiration rate was not obvious. Precipitation had great effect on soil respiration with higher value in rainy season than that in dry season. Vegetation types were another factor affecting soil respiration with higher value in the orchard than that in the pine plantation. The effect of litter to soil respiration was also not obvious. Key words: soil respiration。 land use。 litter。 diurnal variation.
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