Effect of temperature on soil respiration in a Chinese fir forest  

作　　者：GUO Jian-fen YANG Yu-sheng LIU Le-zhong ZHAO Yue-cai CHEN Zeng-wen MAO Yan-ling 

机构地区：[1]Key Laboratory of Humid Subtropical Eco-geographical Process of the Ministry of Education, College of Geographical Sciences Fujian Normal University, Fuzhou 350007, P. R. China [2]Post-doctoral Research Station of Geography, Fujian Normal University, Fuzhou 350007, P. R. China [3]College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China

出　　处：《Journal of Forestry Research》2009年第1期49-53,共5页林业研究（英文版）

基　　金：Foundation project： This study was supported by China Postdoctoral Science Foundation （20070410226） and the Special Foundation for Youn Scientists of Fu＇ian Province （2006F3038）Acknowledgement This research was sponsored by China Postdoctoral Science Foundation （20070410226） and the Special Foundation for Young Scientists of Fujian Province （2006F3038）. The authors are grateful to Dr. Chen Guang-shui and Xie Jin-sheng for their valuable advice and to Qian Wei and Sun Jie for their help in the laboratory analyses.

摘　　要：Soil samples collected from the surface soil （0-10 cm） in an 88-year-old Chinese fir （Cunninghamia lanceolata） forest in Nanping Fujian, China were incubated for 90 days at the temperatures of 15℃, 25℃ and 35℃ in laboratory. The soil CO2 evolution rates were measured at the incubation time of 2, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80 and 90 days. The results showed that CO2 evolution rates of soil samples varied significantly with incubation time and temperature during the incubation period. Mean CO2 evolution rate and cumulative amount of CO2 evolution from soil were highest at 35℃, followed by those at 25℃, and 15℃. Substantial differences in CO2 evolution rate were found in Q10 values calculated for the 2nd and 90th day of incubation. The Q10 value for the average CO2 evolution rate was 2.0 at the temperature range of 15-25℃, but it decreased to 1.2 at 25 35℃. Soil CO2 evolution rates decreased with the incubation time. The cumulative mineralized C at the end of incubation period （on the 90th day） was less than 10% of the initial C amounts prior to incubation.在 88 岁的中国冷杉木(Cunninghamia lanceolata ) 从表土(0 10 厘米) 收集的土壤样品在 Nanping 的森林，福建，中国在实验室在 15 ° C， 25 ° C 和 35 ° C 的温度被孵化 90 天。土壤公司 <SUB>2</SUB> 进化率在 2， 5， 10， 15， 20， 25， 30， 35， 40， 50， 60， 70， 80 和 90 天的孵化时间被测量。结果证明土壤样品的公司 <SUB>2</SUB> 进化率在孵化期期间与孵化时间和温度显著地变化了。吝啬的公司 <SUB>2</SUB> 进化率和从土壤的公司 <SUB>2</SUB> 进化的累积数量在 35 ° C 是最高的，在 25 ° C，和 15 ° C 由那些列在后面。在进化率在 Q <SUB>10</SUB> 价值被发现的公司 <SUB>2</SUB> 的实质的差别为第二 and 计算了第 90 天孵化。为平均公司 <SUB>2</SUB> 进化率的 Q <SUB>10</SUB> 价值在 15 25 ° C 的温度范围是 2.0，但是它在 25 35 ° C 减少了到 1.2。土壤公司 <SUB>2</SUB> 进化率与孵化时间减少了。在孵化期的结束的累积使矿物化的 C (在第 90 天) 是在孵化以前的不到 10% 起始的 C 数量。

关 键 词：forest soil Chinese fir RESPIRATION TEMPERATURE 

分 类 号：S79[农业科学—林木遗传育种]