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探讨了福建和溪亚热带雨林主要营养元素通过凋落物的归还动态．结果表明，该森林一年中凋落物不同组分各元素的含量具有波动性，加权平均含量为Ｎ＞Ｋ＞Ｃａ＞Ｍｇ＞Ｐ（落果Ｃａ＝Ｍｇ、落枝Ｃａ＞Ｋ）。通过凋落物归还Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ元素的年库流量，分别为８７．４１、３．８２、４０．８０、２８．８１和１５．３２ｋｇｈｍ（－２），灰分量为２８４．５７ｋｇｈｍ（－２），其中以落叶形式居最大，分别各占总量的７３．４％、６８．１％、．７７．２％、７２．９％、７４．５％和７９．９％；各元素的年库流量与年凋落物量的月分布相一致，有明显的季节性．森林地表残留物Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ元素的累积储量．分别为５４．８３、２．４５、９．６９、１７．０和９．２５ｋｇｈｍ（－２）．五种元素在林下地表的滞留时间，分别为Ｎ０．６１、Ｐ０．６１、Ｋ０．２３、Ｃａ０．５６和Ｍｇ０．５３年．
The dynamics of the return of the main nutrient elements in littoral and forest in Fujian and Xixia subtropical forests were discussed. The results showed that the contents of different elements of litter in the forest fluctuated with N> K> Ca> Mg> P (Ca = Mg and Ca> K). The annual flow of N, P, K, Ca and Mg elements returned by litter were 87.41, 3.82, 40.80, 28.81 and 15.32 kghm (-2) respectively, and the ash content was 284. 57kghm (-2), of which the largest deciduous form, accounting for 73.4% and 68.1% of the total respectively. 77.2%, 72.9%, 74.5% and 79.9%, respectively. The annual flow of each element was consistent with the monthly distribution of annual litterfall, with obvious seasonal variations. Cumulative reserves of N, P, K, Ca, Mg elements in forest surface residues. 54.83, 2.45, 9.69, 17.0 and 9.25 kghm (-2), respectively. Five elements in the forest surface dwell time, respectively N0.61, P0.61, K0.23, Ca0.56 and Mg0.53 years.