| 武夷山甜槠生态系统的养分平衡研究（英文） |
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| 引用本文： | 李凌浩.武夷山甜槠生态系统的养分平衡研究（英文）[J].植物生态学报,1998,22(3):193-201. |
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| 作者姓名： | 李凌浩 |
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| 摘 要： | 本文通过比较大气降水的养分输入与由地表径流和地下渗流的养分输出，对武夷山甜槠林生态系统的养分平衡进行了研究。结果表明：在1993年4月至1994年4月期间，通过大气降水进入甜槠林的养分元素以N最高，为34.207kg·hm-2，其余依次为Ca(22.99kg·hm-2)、S(12.722kg·hm-2)、Na(6.679kg·hm-2)、K(3.558kg·hm-2)和Mg(2.057kg·hm-2)，以P的输入最低，仅1.779kg·hm-2；由地表径流和地下渗流的养分输出总量N、P、K、Ca、Mg、S、Na分别为5.68、1.016、7.345、3.430、0.620、0.534、0.576kg·hm-2，以K的输出量最高，S的输出最少。其中，通过地下渗流的养分损失占输出总量的85.97％～96.38％，而地表径流的养分输出仅占总输出的3.62％～14.03％；在该系统中，N、Ca和S有大量的积累(分别为28.527、19.560和12.188kg·hm-2)，Mg和Na有少量积累(分别为 1.437和6.103kg·hm-2)，P基本上处于平衡状态(0.763kg·hm-2)，而K则为净的输出损失(-3.787kg·hm-2)。岩石风化对于该生态系统K的补偿可能起重要作用，而其他养分元素仅通过降水输入即可得到补充。
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| 关 键 词： | 养分平衡 降水 径流 甜槠林 武夷山 |
The Nutrient Balance of the Castanopsis eyrei Forest Ecosystem in the Wuyi Mountains |
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| Li Linghao.The Nutrient Balance of the Castanopsis eyrei Forest Ecosystem in the Wuyi Mountains[J].Acta Phytoecologica Sinica,1998,22(3):193-201. |
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| Authors: | Li Linghao |
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| Abstract: | The nutrient balance was determined in a subtropical evergreen broad-leaved forest ecosystem in the Wuyi Mountains from the difference between the precipitation input Of nutrients per hectare and the nutrient output via runoff and drainage per hectare. The results showed that there were large apparent accumulations of nitrogen, calcium, and sulphur, and inputs of magnesium and sodium from the atmospheric precipitation were slightly higher than losses through leaching. Phosphorus appeared to be in close balance in the forest, but there was a net loss of potassium during the period of the study.The weathering of parent material may have played an important role in the potassium economy of the forest. For other nutrients, the forest could maintain itself on nutrient input from the atmosphere. |
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| Keywords: | Nutrient balance Precipitation Run off leaching Leaching Wuyi Mountains Castanopsis eyrei |
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