关 键 字(英文)：Dinghushan Mountain Biosphere Reserve soil respiration Q10 value soil temperature
摘 要(英文)：Field experiment was carried out to examine the soil respiration rate by using static chamber-gas
chromatograph technique in a coniferous and broad-leaved forest in Dinghushan Mountain Biosphere Reserve for
one year. The results show that mean annual soil respiration rate is (400 ±29) mg(CO2 )P(m2·h) , while CO2
from the litter decomposition accounts for 42 % of the total CO2 emission from the soil surface. Significant
relationships are found between soil respiration rate and ambient air temperature , soil temperatures at different
depths(the surface , 5 cm depth , 10 cm depth , 15 cm depth and 20 cm depth) , which could be best
described by exponential equations. The Q10 values based on air temperature and soil temperature at surface ,
5 , 10 , 15 and 20 cm depth vary from 1192 to 21811 The relationships between soil respiration rate and soil
water content in the two observation sites vary with the soil water regime. The diurnal pattern of soil respiration
rate in the rainy season is distinctly different from that in the dry season. Compared with temperate terrestrial
ecosystems , this subtropical forest has a smaller diurnal variation of soil respiration rate.
鼎湖山针阔叶混交林土壤呼吸的研究