杜仲人工林降水再分配特征研究  

Studies on the Precipitation Redistribution of Eucommia ulmoides Plantation

作　　者：欧阳泽怡[1] 周小玲[2] 罗佳[1] 田育新[2] 闫文德[1] 欧阳硕龙[1] 易浩宇 

机构地区：[1]中南林业科技大学,长沙410004 [2]湖南省林业科学院,长沙410004

出　　处：《中国农学通报》2014年第16期41-47,共7页Chinese Agricultural Science Bulletin

基　　金："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)

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。In order to analyze the method of positioned testing, the interception of the Eucommia ulmo precipitation redistribution in Eucommia ulmoides plantation, using the author made a study on the precipitation, throughfall, stemflow and /des plantation in Wulingshan District in 2012. The results demonstrated that throughfall, stemflow and interception accounted for 80.98%, 17.92% and 1.10% of the precipitation, respectively. The results 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 results indicated that, under different phenological stages, the average precipitation decreased observing 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 occurred at the growing stage. It could be seen that redistribution was different under different phenological stages in spite of the same precipitation. In conclusion, the phenological stage played an important role in precipitation redistribution.

关 键 词：降水再分配 物候期 杜仲人工林 

分 类 号：S715.2[农业科学—林学]