以中亚热带杉木纯林(Ⅰ)和常绿阔叶林(Ⅴ)为对照，对闽北地区竹杉混交林(Ⅱ)、毛竹纯林(Ⅲ)、竹阔混交林(Ⅳ)冠层降水再分配特征进行了研究。结果表明：各林分穿透雨率为462 %～862 %，平均穿透雨率排序由大到小为Ⅰ(770 %)、Ⅲ(750 %)、Ⅳ(737 %)、Ⅱ(703 %)、Ⅴ(677 %)；各林分树干茎流量排序由大到小为Ⅳ(692 mm)、Ⅲ(520 mm)、Ⅱ(373 mm)、Ⅴ(230 mm)、Ⅰ(176 mm)，树干茎流量随雨量增大而增大，不同类型毛竹林增加的比例大于杉木纯林和阔叶林；各林分产生树干茎流的最小响应雨量排序由小到大为Ⅱ(64 mm)、Ⅳ(69 mm)、Ⅲ(75 mm)、Ⅴ(89 mm)、Ⅰ(104 mm)；各林分林冠截留率为141 %～535 %，平均林冠截留率排序由大到小为Ⅴ(313 %)、Ⅱ(282 %)、Ⅳ(235 %)、Ⅲ(229 %)、Ⅰ(223 %)。5种林分穿透雨、树干茎流和林冠截留均与林外降雨量显著正相关（p＜001），其中穿透雨量和降雨量的关系用模型Y=a+bX拟合较好；林冠截留量和降雨量之间的关系用三次曲线（Y=β0+β1X+β2X2+β3X3）方程较拟合最好。综合分析表明，毛竹纯林对小到中雨的截留能力较好，竹杉、竹阔混交林对大到暴雨的截留能力较好。

The characteristics of rainfall redistribution under the canopy of three typical Phyllostachys edulis forests (Ph. edulis and Cunninghamia lanceolata mixed forest(Ⅱ), Ph. edulis pure forest(Ⅲ) and Ph. edulis and broadleaved tree mixed stands(Ⅳ)) in the Northern of Fujian province were studied in comparison with C. lanceolata forest (Ⅰ) and evergreen broadleaved forest(Ⅴ). The results showed that: Throughfall rates ranged from 46.23 % to 86.22 %, the order of average throughfall rates was:Ⅰ(77.0 %)＞Ⅲ(75.0 %)＞Ⅳ(73.7 %)＞Ⅱ(70.3 %)＞Ⅴ(67.7 %).It was found that, as rainfall depth and intensity increased, the stemflow of three Ph edulis forests increased with a higher proportion than C. lanceolata forest and evergreen broadleaved forest. The order of stemflow rates was Ⅳ(69.2 mm)＞Ⅲ(52.0 mm＞Ⅱ(37.3 mm)＞Ⅴ(23.0 mm)＞Ⅰ(17.6 mm), and the order of least rainfall produced by stemflow in the five forest stands was:Ⅱ(6.4 mm)＜Ⅳ(6.9 mm)＜Ⅲ(7.5 mm)＜Ⅴ(8.9 mm)＜Ⅰ(10.4 mm). Throughfall, stemflow and canopy interception were linearly correlated to rainfall outside the stands at the extremely significant level(p＜0.01),that the equation Y=a+bX could be used to show the relationship between the rainfall and througfall, and three curve equation (Y=β0+β1X+β2X2+β3X3) was applied to explain the relationship between rainfall and canopy interception.The canopy interception rates ranged form 14.1 % to 53.5 %, that the order was:Ⅴ(31.3 %)＞Ⅱ(28.2 %)＞Ⅳ(23.5 %)＞Ⅲ(22.9 %)＞Ⅰ(22.3 %). In summary, Ph. edulis and Cunninghamia lanceolata mixed forest had the highest interception capability among three different types Ph. edulis forest on heavyhard rain condition while the pure Ph. edulis forest performed best with interception capability on light and moderate rain condition.