CHANG Zhing-yong,BAO Wei-kai,HE Qi-hua,et al.Evapotranspiration Simulation of Quercus liaotungensis and Corylus heterophylla var.sutchuenensis.Franch During Rainfall Process in the Upper Reaches of Minjiang River[J].Research of Soil and Water Conservation,2009,16(01):78-83.
岷江上游辽东栎与川榛在模拟降雨过程中蒸散特征研究
- Title:
- Evapotranspiration Simulation of Quercus liaotungensis and Corylus heterophylla var.sutchuenensis.Franch During Rainfall Process in the Upper Reaches of Minjiang River
- Keywords:
- Quercus liaotungensis; Corylus heterophylla var.sutchuenensis.Franch; transpiration rate; water content of branches and leaves; water preserving capability
- 分类号:
- S715.4
- 摘要:
- 采用密封瓶称重的方法分别在2006年6月下旬和8月下旬对灌丛地的辽东栎和川榛两优势种进行了室内枝叶蒸腾模拟实验，分析了解岷江上游次生落叶阔叶灌丛在降雨过程中蒸散量，以了解这些次生灌丛水文生态效益及涵养水源的能力。结果表明：6月辽东栎和川榛枝叶平均蒸腾速率均高于8月枝叶蒸腾速率，分别是8月的1.6倍和1.5倍。两个物种枝叶蒸腾速率均随枝叶含水率的增加而减小，但是辽东栎枝叶蒸腾速率小于相同含水率条件下的川榛的蒸腾速率。两物种枝叶蒸腾速率均与枝叶含水率呈幂函数趋势。枝叶蒸腾速率与周围环境因素和枝叶生物量等特征密切相关，枝叶蒸腾速率随风速的增大而增加；此外叶片数、叶面积、枝条粗细、长短均对枝叶蒸腾速率具有显著影响。
- Abstract:
- In order to explore evapotranspiration of hypo-vegetal defoliate and broad-leaved shrubs during rainfall process in the Upper Reaches of Minjiang River, an experiment had been conducted to investigate transpiration rate of the two preponderant shrub species,Quercus liaotungensis and Corylus heterophylla var.sutchuenensis.Franch both in June and August.The results showed that two species had higher average transpiration rate(Tr) in June than that in August, which was 1.6 and 1.5 fold in Q. liaotungensis and C.heterophylla var.sutchuenensis.Franch respectively. Tr decreased with increasing water content of branches and leaves in two species. However, Q. liaotungensis with a less Tr than that of C.heterophylla var.sutchuenensis at the same level water content of branches and leaves.The relationships of Tr to water content of branches and leaves were fitted with the power regression equations. Additionally,Tr was closely related to microclimatic factors and biomass of branches and leaves. It increased with increases of wind speed.
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备注/Memo
收稿日期:2008-6-25。
基金项目:中国科学院野外台站基金；“西部之光”人才计划共同资助
作者简介:常志勇（1981- ），男，硕士生，从事水土保持、森林水文研究。E-mail：changzy@cib.ac.cn
通讯作者:包维楷（1968- ），男，四川省广汉市人，博士，研究员，主要研究方向为生态恢复理论与技术方法、多样性保育生态学、苔藓生态学等。E-mail：baowk@cib.ac.cn