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本文对杉木和马尾松林内、外雨树干茎流及迳流所含各种养分物质量进行了测定,其结果表明:林内雨的各种养分物质浓度显著地高于林外雨。林外雨的各养分物质含量是 N>Ca>K>Mg>P,杉木林内雨的各种养分物质量是 K>N>Ca>Mg>P。皆伐迹地迳流中养分流失量显著地高于林地的流失量。雨水养分含量与降雨量存在着半对数函数关系。由降雨输入的养分量显著地大于迳流输出的养分量。林内雨和树干茎流淋溶的养分量占还原养分总量的 48—53％。林内雨和树干淋溶的K、Mg、N的养分量超过凋落物归还的养分量。
In this paper, the contents of various nutrients contained in the stems and streams of the stems and leaves of the Chinese fir and Pinus massoniana forest were measured. The results showed that the concentrations of various nutrients in the rainy forest were significantly higher than those outside the forest. The contents of nutrients in the rain outside the forest were N> Ca> K> Mg> P. The contents of various nutrients in the rain forest were K> N> Ca> Mg> P. The amount of nutrient loss in the stream of catchment was significantly higher than that of the forestland. Rainwater nutrient content and rainfall exist semi-logarithmic function. The amount of nutrients input by rainfall is significantly greater than the amount of nutrients output by the effluent. The amount of leached nutrients in the forest rain and the trunk stem flow accounts for 48-53% of the total amount of reduced nutrients. Rainfall in the forest and trunk leached K, Mg, N exceed the amount of nutrients returned by the litter.