Wang Chao, Huang Rong, Yang Zhi-Jie, Liu Qiang, Chen Guang-Shui, Wan Xiao-Hua
Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China.
Ying Yong Sheng Tai Xue Bao. 2012 Jun;23(6):1469-75.
From January 2009 to December 2009, the soil respiration in the Citrus reticulata and Castanea henryi orchards in Wanmulin Nature Reserve was measured with Li-8100, aimed to characterize the dynamic changes of the soil respiration and its relationships with soil temperature and moisture in the two orchards. The monthly variation of the soil respiration in the orchards was single-peaked, with the peak appeared in July (3.76 micromol x m(-2) x s(-1)) ) and August (2.69 micromol x m(-2) x s(-1)). Soil temperature was the main factor affecting the soil respiration, and explained 73%-86% of the monthly variation of soil respiration. The average annual soil respiration rate was significantly higher in Citrus reticulata orchard than in Castanea henryi orchard, with the mean value being 2.68 and 1.55 micromol x m(-2) x s(-1), respectively. There was a significant positive correlation between the soil respiration rate and soil moisture content in Castanea henryi orchard, but less correlation in Citrus reticulata orchard. The Q10 value of the soil respiration in Citrus reticulata and Castanea henryi orchards was 1.58 and 1.75, and the annual CO2 flux was 10.01 and 5.77 t C x hm(-2) x a(-1), respectively.
2009年1月至2009年12月，利用Li-8100对万木林自然保护区的柑橘园和锥栗园土壤呼吸进行测定，旨在研究这两种果园土壤呼吸的动态变化及其与土壤温度和湿度的关系。果园土壤呼吸的月变化呈单峰型，峰值出现在7月（3.76 μmol·m⁻²·s⁻¹）和8月（2.69 μmol·m⁻²·s⁻¹）。土壤温度是影响土壤呼吸的主要因素，解释了土壤呼吸月变化的73%-86%。柑橘园年平均土壤呼吸速率显著高于锥栗园，平均值分别为2.68和1.55 μmol·m⁻²·s⁻¹。锥栗园土壤呼吸速率与土壤含水量呈显著正相关，而柑橘园相关性较弱。柑橘园和锥栗园土壤呼吸的Q10值分别为1.58和1.75，年CO₂通量分别为10.01和5.77 t C·hm⁻²·a⁻¹。
