Insights into the isotopic mismatch between bulk soil water and Salix matsudana Koidz trunk water from root water stable isotope measurements
Ying Zhaoand Li Wang
Ying Zhao
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess
Plateau, Institute of Soil and Water Conservation, Chinese Academy of
Sciences and the Ministry of Water Resources, Yangling 712100, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess
Plateau, Institute of Soil and Water Conservation, Chinese Academy of
Sciences and the Ministry of Water Resources, Yangling 712100, China
College of Natural Resources and Environment, Northwest A&F
University, Yangling 712100, China
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At our study site during the experimental period, trunk water was only isotopically similar to root water at 100–160 cm depths. The isotopic composition of root water deviated from that of bulk soil water but overlapped with the composition derived for less mobile water. These findings suggest that the isotopic offset between bulk soil water and trunk water was due to the isotopic mismatch between root water and bulk soil water associated with soil water heterogeneity.
At our study site during the experimental period, trunk water was only isotopically similar to...
