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应用生态学报 ›› 2010, Vol. 21 ›› Issue (12): 3015-3020.

• 研究报告 • 上一篇    下一篇

积雪对长白山阔叶红松林土壤温度的影响

于小舟1,2,袁凤辉1,王安志1,吴家兵1,关德新1**   

  1. 1中国科学院沈阳应用生态研究所,沈阳 110016;2中国科学院研究生院,北京 100049
  • 出版日期:2010-12-18 发布日期:2010-12-18

Effects of snow cover on soil temperature in broad-leaved Korean pine forest in Changbai Mountains.

YU Xiao-zhou1,2, YUAN Feng-hui1, WANG An-zhi1, WU Jia-bing1, GUAN De-xin1   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2010-12-18 Published:2010-12-18

摘要: 2004—2007年对长白山阔叶红松林林地进行遮雪试验,观测了有雪、无雪覆盖的森林土壤温度和气温.结果表明:积雪对土壤温度变化有明显的缓冲作用,有雪覆盖减缓了土壤温度的变化; 积雪对浅层(0~20 cm)土壤有较好的保温作用,随雪深的增加,保温作用增大,雪深从10 cm 增至20 cm时保温作用的增幅最大,当雪深超过30 cm时,保温作用的增幅不明显; 融雪期土温经历0 ℃左右的恒温期后缓慢上升,恒温期的持续时间主要由冬季的雪深及其时间分布所决定.

关键词: 阔叶红松林, 雪, 土壤温度, 长白山, 森林土壤, 潜在可矿化碳, 易矿化碳, 碳水化合物, 季节变化

Abstract: A snow-shading experiment was conducted in a broad-leaved Korean pine forest in Changbai Mountains from 2004 to 2007 to observe the soil temperature with and without snow cover. Snow cover played an important buffering role in the change of soil temperature, namely, slowed down the change process of soil temperature. The effect of snow cover on preserving soil heat was quite obvious in shallow soil layer (0-20 cm), and enhanced with increasing snow depth. When the snow depth increased from 10 to 20 cm, the effect enhanced significantly. However, when the snow depth exceeded 30 cm, the increasing trend turned to indistinctive. In the period of snow-melting, soil temperature kept around 0 ℃ for some time, and after then, increased gradually. The length of the period keeping soil temperature around 0 ℃ was determined by snow depth and the duration of snow cover.

Key words: broad-leaved Korean pine forest, snow, soil temperature, Changbai Mountains, forest soil, potentially mineralizable carbon, easily mineralizable carbon, carbohydrate, seasonal dynamics.