南京林业大学学报(自然科学版) ›› 2011, Vol. 35 ›› Issue (04): 63-66.doi: 10.3969/j.jssn.1000-2006.2011.04.013

• 研究论文 • 上一篇    下一篇

闽北不同类型毛竹林冠层降水再分配特征

刘蔚漪1,范少辉1*,刘广路1,郭宝华1,余林1,陈孝丑2   

  1. 1.国际竹藤网络中心,竹藤科学与技术重点实验室,北京100102;2.福建洋口国有林场,福建顺昌353211
  • 出版日期:2011-08-13 发布日期:2011-08-13
  • 基金资助:
    收稿日期:2010-12-06修回日期:2011-04-11 基金项目:“十一五”国家科技支撑计划(2006BAD19B0103);国际竹藤网络中心专项资金项目作者简介:刘蔚漪(1982—),博士生。*范少辉(通信作者),研究员。Email: fansh@icbr.ac.cn。

Characteristics of rainfall redistribution under the canopy of different types Phyllostachys edulis forests in Northern Fujian province

LIU Weiyi1, FAN Shaohui1*, LIU Guanglu1, GUO Baohua1, YU Lin1, CHEN Xiaochou2   

  1. 1.International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, Beijing 100102,China;2.Yangkou National Forest Farm of Fujian Province, Shunchang 353211, China
  • Online:2011-08-13 Published:2011-08-13

摘要: 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。

Abstract: 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.

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