ZHANG Jianguo,Yan Meijie,Du Sheng.Characteristics of Rainfall Partitioning in Two Typical Forests Under Continuous Rainfall in the Loess Hilly Region[J].Research of Soil and Water Conservation,2016,23(05):158-163,168.
连续降雨条件下黄土丘陵区两典型林分降雨分配特征研究
- Title:
- Characteristics of Rainfall Partitioning in Two Typical Forests Under Continuous Rainfall in the Loess Hilly Region
- Keywords:
- continuous rainfall; stem flow; throughfall; canopy interception; Quercus liaotungensis; Robinia pseudoacacia
- 分类号:
- S715.2
- 摘要:
- 植被的降雨分配是重要的水文过程和生态功能。基于连续降雨条件下，采用雨量筒收集法，实地观测了黄土丘陵区两典型森林群落——辽东栎次生林和刺槐人工林的树干流和穿透雨。结果表明：连续降雨条件下，两典型森林群落穿透雨与降雨量之间存在极显著的相关关系，辽东栎林分穿透雨占降雨量的86%，刺槐林分穿透雨占降雨量的89%；辽东栎单株树干流与胸径之间呈显著正相关线性关系；辽东栎林分树干流和刺槐林分树干流与降雨量之间均存在极显著线性相关，两林分树干流分别占降雨量的14%和6%，辽东栎林树干流和穿透雨之和与降雨量相等，表明该林分在连续降雨条件下，该林分树冠截流等于0；刺槐树干流和穿透雨之和与降雨量相比，相差5%，这可能与该林分灌木层的二次分配有关。
- Abstract:
- Rainfall partitioning by vegetation is important hydrological process and functions of ecosystems. We investigated the stem flow and throughfall in two typical forests: a natural Quercus liaotungensis dominated forest and a pure Robinia pseudoacacia plantation under continuous rainfall events by field observation using the rainfall collector. The results showed that there was significant linear relation between throughfall and gross precipitation in two typical forests for continuous rainfall events. Throughfall accounted for 86% and 89% of total rainfall in Quercus liaotungensis forest and in Robinia pseudoacacia plantation, respectively. Stem flow of individual trees of Quercus liaotungensis was positively linearly correlated with DBH (Diameter at breast height); stem flow of individuals of Robinia pseudoacacia was negatively linearly correlated with DBH. The proportions of stand stem flows in gross rainfall of two typical forests were 14% and 6%, respectively. The sum of stem flow and throughfall was equal to the gross rainfall in Quercus liaotungensis forest, indicating that there was no canopy interception for continuous rainfall events in this forest. The difference between the sum of stem flow and throughfall with the gross rainfall was 5% in Robinia pseudoacacia plantation, and maybe it was related with the redistribution of throughfall in the shrub layer in this plantation.
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备注/Memo
收稿日期:2014-11-11;改回日期:2015-11-15。
基金项目:国家自然科学基金（41171419，41411140035，41471440）；中国科学院知识创新工程“百人计划”项目（kzcx2-yw-BR-02）
作者简介:张建国(1986-),男,山东肥城人,博士,主要从事流域生态与管理研究。E-mail:zhangjidezs@163.com
通讯作者:杜盛(1965-),男,内蒙古鄂尔多斯人,博士,研究员,主要从事半干旱地区植被恢复生态学、群落生态水文过程等研究。E-mail:shengdu@ms.iswc.ac.cn