林窗对川西亚高山云杉人工林土壤呼吸的影响

发布时间：2018-03-15 12:07

本文选题：川西亚高山　切入点：林窗　出处：《应用与环境生物学报》2016年03期 　论文类型：期刊论文

【摘要】：为了解林窗对川西亚高山粗枝云杉(Picea asperata)人工林土壤呼吸的影响,采用CO2通量全自动监测系统对川西亚高山粗枝云杉人工林林窗和林内土壤呼吸及土壤温度、水分进行为期两年的连续观测,比较分析林窗和林内环境因子和土壤呼吸速率的变化.结果表明:川西亚高山粗枝云杉人工林林窗和林内的土壤温度、土壤水分和土壤呼吸速率均具有显著的季节动态.在生长季节(4-10月),林窗效应使土壤温度、土壤水分和土壤呼吸速率较林内分别增加了48.8%、19.3%和18.6%;而冬季(11月-翌年3月)两种环境之间并无显著差异.林窗和林内土壤呼吸速率和土壤温度均呈显著指数相关(P0.01),与土壤水分呈显著线性相关(P0.05).林窗和林内的土壤呼吸温度敏感性(Q_(10))分别为2.46和3.01.综上所述,林窗效应对川西亚高山森林土壤呼吸具有显著刺激作用,且有明显的季节动态特征.(图3表1参33)
[Abstract]:In order to understand the effect of forest gap on soil respiration of Picea asperata plantation in western Sichuan, soil respiration and soil temperature in the canopy and forest of Picea asperata plantation in western Sichuan were studied by CO2 flux automatic monitoring system. The changes of environmental factors and soil respiration rate in forest gap and forest were compared and analyzed for two years. The results showed that the soil temperature in the canopy and forest of Picea alpine plantations in West Sichuan was studied. Both soil moisture and soil respiration rate have significant seasonal dynamics. Soil moisture and soil respiration rate increased by 48.3% and 18.6%, respectively, but there was no significant difference between the two environments in winter (November-March). There was a significant exponential correlation between canopy and forest soil respiration rate and soil temperature. There was a significant linear correlation between soil moisture and soil moisture. The sensitivity of soil respiration temperature to forest gap and forest was 2.46 and 3.01, respectively. The canopy effect has a significant stimulating effect on the soil respiration of mountain forest in western Sichuan, and has obvious seasonal dynamic characteristics. (fig. 3, table 1, refs. 33)
【作者单位】：四川农业大学生态林业研究所四川省林业生态工程重点实验室;四川农业大学高山森林生态系统定位研究站长江上游生态安全协同创新中心;
【基金】：国家自然科学基金项目(31570445,31570601和31500509) 中国博士后科学基金项目(2013M540714,2014T70880)资助~~
【分类号】：S714

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