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以小集水区定位测定方法，系统地测定了海南尖峰岭热带山地雨林更新林系统水文分量及水化学组成，分析比较了热带林生态系统降水化学含量及冠层的淋溶效应；其本实验区年降水量在１８２２．２ｍｍ～３２２５．８ｍｍ，林冠层年均截留率为１４．３％，年径流系数在０．３３～０．７１之间，降水养分元素输入总量均值为８５．８１ｋｇ／ｈｍ２．ａ，林层的淋溶效应使养分元素增加５７．０４ｋｇ／ｈｍ２．ａ。５～１０月是降水、水化学物主要输入以及林层淋溶率颇高的季节，降水占年总量８５．４％、水体各元素量占相应年总量在５８．１％～９０．０％，淋溶量在７２．２％～８９．２％；系统具有良好的化学调节能力和化学贮滤机制，有效地抑制了水及化学组成物质的流失，仅以Ｋ、Ｓｉ、Ａｌ和有机Ｃ流失量大于输入量，表现出良好的生态效益。水化学林溶量与降水量间，以灰色关联动态方法建立的动态模式ＧＭ（１，２），精度较高，宜于系统水化学淋溶量的动态估算。
In this paper, the hydrological components and water chemistry of the reforestation system of tropical montane rain forest in Jianfengling of Hainan Province were systematically determined by using the method of small catchment location. The chemical composition of precipitation and the leaching effect of canopy in tropical forest ecosystem were analyzed and compared. The annual precipitation is 1822.2mm ~ 3225.8mm, the annual average canopy interception rate is 14.3% and the annual runoff coefficient is between 0.33 ~ 0.71. The total input of precipitation nutrient elements is 85.81kg / Hm2. a, the leaching effect of forest layer increased the nutrient element by 57.04kg / hm2. a. From May to October, it is the season of precipitation, water chemical input and leaching rate of forest layer. Precipitation accounts for 85.4% of the total annual volume, and the amount of each element in water body accounts for 58.1% ~ 90% of the total. 0% and the leaching amount is 72.2% ~ 89.2%. The system has good chemical regulation ability and chemical storage filtration mechanism, which effectively restrain the loss of water and chemical composition materials. Only K, Si, Al and Organic C loss is greater than the input, showing good ecological benefits. The dynamic model GM (1, 2) established by the gray correlation dynamic method is more accurate than that of the hydrochemistry forest, and is suitable for the dynamic estimation of the chemical water leaching of the system.