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Position: Home > Articles > Respiration Dynamics of Coarse Woody Debris of Larix gmelini at North Slope of Daxing'an Mountain Journal of Northeast Forestry University 2014 (6) 29-33

大兴安岭北坡兴安落叶松粗木质残体呼吸动态

作  者:
矫海洋;王顺忠;王曼霖;谷会岩
单  位:
植被与环境变化国家重点实验室(中国科学院植物研究所);东北林业大学
关键词:
择伐;兴安落叶松;粗木质残体;温度系数;季节动态
摘  要:
以采伐强度为25%和50%伐后5、10、20和30 a的兴安落叶松林为研究对象,利用红外气体分析法研究分解初期兴安落叶松呼吸季节动态变化。结果表明:采伐对粗木质残体呼吸具有加强效果。同时采伐强度为50%的各个试验样地呼吸值均较高。采伐强度50%伐后10 a的兴安落叶松林呼吸强度最大5.75μmol·m-2·s-1,而强度50%伐后30 a的兴安落叶松林呼吸强度最小是0.33μmol·m-2·s-1。在季节动态中各强度的干扰下基本上保持相同的季节动态,呈单峰曲线格局,波峰7—8月。Q10值波动在3.97(强度25%,伐后10 a)~1.70(强度25%伐后20 a),平均值2.52。
译  名:
Respiration Dynamics of Coarse Woody Debris of Larix gmelini at North Slope of Daxing'an Mountain
作  者:
Jiao Haiy-ang;Wang Shunzhong;Wang Manlin;Gu Huiyan;Northeast Forestry University;State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of Sciences;
关键词:
Selective cutting;;Coarse woody debris;;Temperature coefficient;;Seasonal dynamics
摘  要:
With the cutting Larix gmelinii from harvesting intensity in 25% and 50% after 10,20 and 30 years,we used the infrared gas analysis method to study the early seasonal respiration dynamics of coarse woody debris of Larix gmelini.The cutting can strengthen the respiration.But the respiration in the forest with logging intensity of 50% are higher.The respiration in the forest with logging intensity of 50% cut before 10 years is the maximum of 5.75 μmol·m-2·s-1,and the respiration in the forest with 50% cutting intensity cut before 30 years is the minimum of 0.33 μmol·m-2·s-1.The respiration shows unimodal curve pattern and peaks from July to August.Q10 value varies from 3.97( longing intensity of25%,10 years after cutting) to 1.70( logging intensity of 25%,10 years after cutting) with the average of 2.52.

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