摘要
本文对鼎湖山南亚热带季风常绿阔叶林—黄果厚壳桂（Ｃｒｙｐｔｏｃａｒｙａｃｏｎｅｉｎｎａ）、鼎湖钓樟（Ｌｉｎｄｅｒａｃｈｕｎｉｉ）群落的水文学过程以及水系统中的氮素动态特征进行了初步研究。结果显示：所研究的群落中雨水输入的氮量较高，达３５．５７ｋｇ·ｈａ￣（－１·－１），但渗入土壤及地表径流输出的氮也多，分别为１８．２８和９．２５ｋｇ·ｈａ￣（－１）·ｙｒ￣（－１），输入输出之差为８．０４ｋｇ·ｈａ￣（－１）·ｙｒ￣（－１）。雨水对林冠的氮素淋溶量为４．７２ｋｇ·ｈａ￣（－１）·ｙｒ￣（－１）。通过回归分析，发现各类型水中含氮量与降雨量之间存在较显著的直线相关关系。不同树种的树干茎流中氮浓度存有差别。
The hydrological processes and nitrogen dynamics of a small watershed were studied in a monsoon evergreen broad-leafed forest of Dinghu Shan Biosphere Reserve. The results showed that the hydrology of this forest had distinct characteristics.The nitrogen input by rainfall was 35.57kg.ha￣(-1) and the output in surface runoff was 9.25kg·ha￣(-1) in a year.4.72kg·ha￣(-1)·yr￣(-1) of nitrogen was leached out from the canopy by rain. The nitrogen concentra-tions in stemflow of different species were different.The regression equations of nitrogen contents in each component of the hydrological cycle and the monthly rainfall were set up.
出处
《植物生态学报》
CAS
CSCD
北大核心
1994年第2期194-199,共6页
Chinese Journal of Plant Ecology
关键词
季风
常绿阔叶林
水文学
氮
Monsoon forest
Hydrological processes
Nitrogen
