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本文通过室内90天培养实验,研究了不同温度(15℃、25℃和35℃)对福建南平88年生杉木林(Cunninghamia lanceolata)土壤(0-10cm)呼吸的影响。结果表明,土壤CO,释放速率随培养时间和培养温度发生明显变化。在15℃,25℃,35℃下,土壤平均呼吸速率和累积呼吸量逐渐增高,在35℃达到最高。培养初期(第2天)和末期(第90天),土壤Q10值(温度系数)差异明显。培养期温度范围为15-25℃时土壤Q10平均值为2.0,而当温度范围为25～35℃时,Q10平均值为1.2。整个培养过程中土壤呼吸速率一般随培养时间延长而递减。培养90天后土壤累积呼吸释放的碳量较低,它与培养前土壤初始碳量的比值小于10%。
In this study, the effect of different temperature (15 ℃, 25 ℃ and 35 ℃) on the respiration of Cunninghamia lanceolata soil (0-10cm) in Nanping, Fujian Province was studied in a 90-day indoor culture experiment. The results showed that soil CO and release rate changed obviously with the incubation time and culture temperature. At 15 ℃, 25 ℃, 35 ℃, the average soil respiration rate and cumulative respiration increased gradually and reached the highest at 35 ℃. The soil Q10 value (temperature coefficient) differed significantly in the early (day 2) and end (day 90) cultivation. Soil Q10 averaged 2.0 at the incubation temperature range of 15-25 ° C, while the Q10 averaged 1.2 at 25-35 ° C. Soil respiration rates generally decrease with incubation time throughout the incubation period. After 90 days of cultivation, the cumulative carbon released by the soil was lower and the ratio of the initial carbon to soil before cultivation was less than 10%.