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中国农学通报 ›› 2014, Vol. 30 ›› Issue (16): 41-47.doi: 10.11924/j.issn.1000-6850.2014-0367

• 林学 园艺 园林 • 上一篇    下一篇

杜仲人工林降水再分配特征研究

欧阳泽怡 周小玲 罗佳 田育新 闫文德 欧阳硕龙 易浩宇   

  • 收稿日期:2014-02-18 修回日期:2014-03-20 出版日期:2014-06-05 发布日期:2014-06-05
  • 基金资助:
    “十二五” 国家科技支撑计划(2011BAD38B0405);“湖南近自然森林经营试验与示范” (2012-HNLYKY-01);

Studies on the Precipitation Redistribution of Eucommia ulmoides Plantation

  • Received:2014-02-18 Revised:2014-03-20 Online:2014-06-05 Published:2014-06-05

摘要: 为了分析杜仲人工林降水再分配过程,采用定位研究方法,对武陵山区女儿寨小流域杜种人工林2012年的降水量、穿透水量、林冠截留量、树干茎流量进行观测。结果表明:该杜仲人工林全年穿透水量、林冠截留量、树干茎流量分别占全年降水量的80.98%、17.92%,1.10%。杜仲人工林穿透降水量、林冠截留量与林外降水量呈明显的线性关系(R2分别为0.9971、0.897),树干茎流量与林外降水呈指数关系(R2=0.469)。树干茎流量与降水量呈显著性正相关(r=0.642, N=141, P<0.01),树干茎流率与降水量呈显著性负相关(r=-0.384, N=141, P<0.01)。不同物候期下发生等量降水,降水再分配结果不一定相同,物候期对降水再分配结果有着重要影响。不同物候期各水文分量与林外降水关系表现存在差异,单个物候期水文分量与林外降水的关系与全年相比也可能存在差异。

关键词: 气相色谱-质谱, 气相色谱-质谱

Abstract: In order to analyze the precipitation redistribution in Eucommia ulmoides plantation, using the method of positioned testing, the author made a study on the precipitation, throughfall, stemflow and interception of the Eucommia ulmoides plantation in Wulingshan District in 2012, and. The results demonstrated that throughfall, stemflow and interception accounted for 80.98%, 17.92% and 1.10% of the precipitation, respectively. The study also showed a clear linear relationship between the throughfall and the precipitation, the same to the relationship between the interception and the precipitation. However, there was an exponential relationship between the stemflow and the precipitation, and the stemflow rate presented significant negative correlation with the precipitation (r=-0.384, N=141, P<0.01). In addition, the study indicated that, under different phenological stages, the average precipitation decreased followed the sequence of dormancy stage, germination stage, abscission stage, and growing stage. While the stemflow rate fell according to the sequence of abscission stage, dormancy stage, germination stage, and growing stage. Both of the minimum value of stemflow and throughfall occurs at the growing stage. It could be seen that redistribution might not be the same under different phenological stages in spite of same precipitation. In conclusion, the phenological stage played an important role in precipitation redistribution.