基于碳氢氧同位素的桉树人工林水循环过程研究进展  

Advances on the Water Cycle Process of Eucalyptus Plantation Based on Carbon,Hydrogen and Oxygen Isotopes

作　　者：左海军 徐庆[1] 高德强 张蓓蓓 许文斌 Zuo Haijun;Xu Qing;Gao Deqiang;Zhang Beibei;Xu Wenbin(Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091)

机构地区：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091

出　　处：《陆地生态系统与保护学报》2024年第2期71-77,共7页Terrestrial Ecosystem and Conservation

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020SY025,CAFYBB2017ZB003)。

摘　　要：桉树是我国南方地区重要的速生用材树种,在我国人工林资源中具有十分重要的地位。然而,桉树种植带来的生态环境问题日益受到关注,尤其在对桉树是否为“抽水机”、桉树大面积种植是否导致土壤干旱和地下水位下降等问题上一直存在诸多争议。碳氢氧稳定同位素为陆地生态系统水循环过程定量研究提供了有效和便捷的方法,能系统和定量地阐明桉树人工林生态系统水文过程、不同水体转化关系和桉树水分利用效率等。系统归纳了碳氢氧同位素在桉树人工林生态系统水循环过程(包括大气降水、林冠穿透水、地表水、土壤水、植物水、地下水及蒸发水等)和植物水分利用效率中的应用研究进展,指出了当前研究中存在的不足,展望了其未来研究和应用前景。研究结果可为我国桉树人工林可持续经营理念下的水资源优化管理提供科学依据。Eucalyptus,an important tree species for establishing fast-growing timber forest in the southern region of China,plays a crucial role in plantation resource of China.However,the ecological and environmental issues induced by Eucalyptus planting have been attracted more attentions.Especially,it remains controversial in some issues,such as whether Eucalyptus plantation is a"water pump",whether large-scale development of Eucalyptus plantations leads to soil drought and groundwater level decrease.Carbon,hydrogen,and oxygen stable isotopes technology can be used as a more effective and convenient method for quantitatively studying the water cycle process of terrestrial ecosystem.Specifically,this technology can systematically clarify the hydrological process,transformation relationship of various water bodies and plant water use efficiency in Eucalyptus plantation ecosystems.This paper systematically summarized the main research progress on the applications of carbon,hydrogen,and oxygen stable isotopes in water cycle processes(including precipitation,canopy throughfall,surface water,soil water,plant xylem water,groundwater,and evaporated water)and plant water use efficiency in Eucalyptus plantation ecosystems.Furthermore,this paper pointed out the shortcomings of the current researches on water cycle processes in Eucalyptus plantations based on stable isotope and looked forward to its future studies and application prospects.The results can provide a scientific basis for the optimized management of water resources in the Eucalyptus plantations under the context of sustainable management in China.

关 键 词：桉树人工林 氢氧稳定同位素 碳稳定同位素 水循环过程 植物水分利用 

分 类 号：S715[农业科学—林学]