| 长白山高山苔原雪斑大白花地榆群落土壤氮素动态与生产力的关系 |
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| 引用本文： | 徐倩倩,刘琪璟,张国春.长白山高山苔原雪斑大白花地榆群落土壤氮素动态与生产力的关系[J].植物生态学报,2011,35(2):159-166. |
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| 作者姓名： | 徐倩倩 刘琪璟 张国春 |
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| 作者单位： | 北京林业大学林学院省部共建森林培育与保护教育部重点实验室, 北京 100083 |
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| 基金项目： | 致谢国家自然科学基金(40671098)资助 |
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| 摘 要： | 在高山苔原冬季积雪覆盖的群落生长季短, 但明显比周围群落生长茂盛。为了说明雪斑地段群落生长机理, 对长白山苔原雪斑土壤氮素动态以及大白花地榆(Sanguisorba sitchensis)群落生产力进行了连续测定。雪斑群落土壤冬季相对温暖, 最低日平均温度-1.4 ℃, 裸露地段-16.9 ℃, 全年水分条件充足; 积雪期凋落物分解和氮矿化均在进行, 土壤具有很高的氮素含量及矿化速率。大白花地榆地上部分净初级生产力为4 046 kg·hm-2·a-1。正是独特的水热条件和养分条件, 以及具有很大的叶面积同化器官, 高山苔原雪斑地段的大白花地榆群落才得以维持生存并表现出很高的生产力水平。
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| 关 键 词： | 群落生产力 水解氮 养分循环 积雪 |
| 收稿时间： | 2010-01-28 |
Soil nitrogen dynamics and productivity of snowpack Sanguisorba sitchensis community in alpine tundra of Changbai Mountain, China |
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| XU Qian-Qian,LIU Qi-Jing,ZHANG Guo-Chun.Soil nitrogen dynamics and productivity of snowpack Sanguisorba sitchensis community in alpine tundra of Changbai Mountain, China[J].Acta Phytoecologica Sinica,2011,35(2):159-166. |
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| Authors: | XU Qian-Qian LIU Qi-Jing ZHANG Guo-Chun |
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| Institution: | Key Laboratory for Silviculture and Conservation of Ministry of Education, Department of Forest Sciences, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | Aims Snowpack plant communities in alpine tundra are active in comparison with surrounding vegetation, despite the short growing season due to thick snow cover. Our objective was to understand the growth mechanism of snowpack communities. Methods The nutrient dynamics and primary productivity of snowpack Sanguisorba sitchensis community in alpine tundra of Changbai Mountain was investigated in different seasons. Important findings Soil temperature under snowpack during winter was warmer than snow-free areas... |
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| Keywords: | community productivity hydrolysable nitrogen nutrient cycling snow cover |
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