欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用静态箱-气相色谱法对寒温带大兴安岭兴安落叶松渐伐林生长盛季的地表CH4通量进行原位观测和研究。结果表明：在生长盛季该地区森林土壤总体表现为大气CH4的吸收汇,CH4日平均通量为（Mean±SE）-0.05±0.01 mg.m-2.h-1,且峰值出现在0：00和16：00左右。在生长盛季整体上原状林地土壤和无凋落物覆盖不同处理对土壤CH4通量的影响无显著差异,但在变化幅度和时间分布上有一定差异,无凋落物处理下土壤的CH4吸收通量变化幅度大于原状林地土壤。观测期间土壤CH4通量与温度具有一定的正相关关系,但线性相关系数较小,而与湿度相关性不显著,表明该地区在生长盛季土壤温度在控制土壤CH4通量中表现出重要性。
英文摘要：
Flux of soil CH4 was measured by closed static chamber-gas chromatograph technique in larix gmelinii successive cutting forest of Great Hingan mountains in cold temperate zone.The results showed that the soil of this region was a sink of CH4 to the atmosphere as a whole during the growing season,the daily mean soil CH4 flux（mean±SE） was-0.05±0.01 mg·m-2·h-1 during the observation period and the peak values appeared at about 0：00 and 16：00 respectively.Removal of surface litter had no significant effect on CH4 flux during the observation period,but there are some differences in the scale and time distribution.The plot with Iitters has larger scale than the Iitter-free plot.CH4 flux was obviously correlated with soil temperature,but the liner correlation coefficient is relatively small.However,CH4 flux was not correlated with soil moisture,which indicated that soil temperature was a main factor to control the CH4 flux during the growing season in this region.
同期刊论文项目
同项目期刊论文
Foliar and soil N-15 natural abundances provide field evidence on nitrogen dynamics in temperate and
CO2 Flux Estimation by Different Regression Methods from an Alpine Meadow on the Qinghai-Tibetan Pla
Rice to vegetables: short versus long-term impact of land use change on the indigenous soil microbia
C-13 abundance, water-soluble and microbial biomass carbon as potential indicators of soil organic c
Spatiotemporal dynamics of aboveground primary productivity along a precipitation gradient in Chines
Mechanism and bio-environmental controls of ecosystem respiration in a cropland in the North China P
Litter production, leaf litter decomposition and nutrient return in Cunninghamia lanceolata plantati
Responses to N and P fertilization in a young Eucalyptus dunnii plantation: Microbial properties, en
Effects of vegetation control on ecosystem water use efficiency within and among four grassland ecos
期刊信息
位置：