摘要
应用稳定碳同位素法测定福建长汀水土流失区马尾松与木荷的叶片稳定碳同位素组成(δ^(13)C)值,以指示两种植物的长期水分利用效率(WUE),从而探究了生态恢复过程中优势树种的水分利用效率特征、策略及竞争能力。结果表明:马尾松叶片的碳同位素组成(δ^(13)C)和水分利用效率(WUE)随着生境生态恢复程度的提高显著增大,且在其生长发育过程中具有相对稳定性;木荷叶片δ^(13)C值和WUE随着生境生态恢复程度的提高显著降低,且在时间尺度上具有更大的可塑性。马尾松与木荷种间水分利用策略的不同,可能来源于针叶树种和阔叶树种在生物学特征方面的差异。
The stable carbon isotope composition(δ^(13)C)of the leaves of Pinus massoniana and Schima superba in the soil and water loss area of Changting,Fujian Province was determined by using the stable carbon isotope method to indicate the long-term water use efficiency(WUE)of the two plants,in order to explore the water use efficiency characteristics,strategies and competitiveness of the dominant tree species in the process of ecological restoration.The results showed that:the carbon isotope composition(δ^(13)C)and water use efficiency(WUE)of the leaves of Pinus massoniana increased significantly with the improvement of ecological restoration degree,and were relatively stable during its growth and development.Theδ^(13)C value and WUE of the leaves of Schima superba decreased significantly with the improvement of ecological restoration degree,and had greater plasticity on the ime scale.The difference of water use strategy between Pinus massoniana and Schima superba might be resulted from the difference of biological characteristics between coniferous tree species and broadleaved tree species.
作者
傅贺菁
FU He-jing(National Demonstration Center for Experimental Geography Education,Fujian Normal University,Fuzhou,Fujian 350007,China;College of Geographical Science,Fujian Normal University,Fuzhou,Fujian 350007,China)
出处
《福建农业科技》
CAS
2022年第6期59-63,共5页
Fujian Agricultural Science and Technology
基金
福建师范大学2021年大学生创新训练计划项目(cxxl-2021440)。
