TY - JOUR
T1 - Distinct transpiration characteristics of black locust plantations acclimated to semiarid and subhumid sites in the Loess Plateau, China
AU - Lyu, Jinlin
AU - He, Qiu Yue
AU - Chen, Qiu Wen
AU - Cheng, Ran Ran
AU - Li, Guoqing
AU - Otsuki, Kyoichi
AU - Yamanaka, Norikazu
AU - Du, Sheng
N1 - Funding Information:
This study was supported by the National Key R&D Program of China ( 2017YFC0504601 ), the National Natural Science Foundation of China ( 41471440 , 41411140035 ), and Japan Society for the Promotion of Science for a NSFC-JSPS joint research project.
Funding Information:
The authors declare the following financial interests/personal relationships which may be considered as potential competing interests, Sheng Du reports financial support was provided by National Key Research and Development Program of China. Sheng Du reports financial support was provided by National Natural Science Foundation of China. Norikazu Yamanaka reports financial support was provided by Japan Society for the Promotion of Science.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3/31
Y1 - 2022/3/31
N2 - Black locust (Robinia pseudoacacia) is widely planted throughout semiarid and subhumid regions of the Loess Plateau of China. Determining the changes in transpiration of this species in different climatic areas is important for revealing the acclimation mechanism of black locust and developing suitable forest management practices, particularly in the context of global climate change. Here, sap flow and canopy conductance of black locust plantation trees in semiarid (Yan'an) and subhumid (Yongshou) sites were quantified using Granier-type thermal dissipation probes and concurrent environmental observations from 2012 to 2017. Several physiological parameters were measured throughout the growing season. The results showed that sap flow was correlated with phenological factors across seasons within a year. However, interannual changes in sap flow were affected mainly by the reference evapotranspiration (ET0) at the Yongshou site, and jointly by precipitation (P), soil water content, and P/ET0 at the Yan'an site. Sap flow response to meteorological factors showed less discrepancy between pre- and post-rainfall periods at the Yan'an site. Moreover, canopy conductance fluctuated less with a wider range of vapor pressure deficit (VPD) and the slope of canopy resistance as a function of VPD was lower, indicating relatively lower sensitivity of stomatal conductance to environmental factors in Yan'an site. Physiological parameters, except for predawn leaf water potential, were significantly different between the two sites. The results suggested that black locust tended to reduce transpiration, modify leaf morphology, and improve water use efficiency to enhance its adaptability to the dryer site. The species changes stomatal regulation characteristics and general growth rate to acclimatize to distinct water habitats.
AB - Black locust (Robinia pseudoacacia) is widely planted throughout semiarid and subhumid regions of the Loess Plateau of China. Determining the changes in transpiration of this species in different climatic areas is important for revealing the acclimation mechanism of black locust and developing suitable forest management practices, particularly in the context of global climate change. Here, sap flow and canopy conductance of black locust plantation trees in semiarid (Yan'an) and subhumid (Yongshou) sites were quantified using Granier-type thermal dissipation probes and concurrent environmental observations from 2012 to 2017. Several physiological parameters were measured throughout the growing season. The results showed that sap flow was correlated with phenological factors across seasons within a year. However, interannual changes in sap flow were affected mainly by the reference evapotranspiration (ET0) at the Yongshou site, and jointly by precipitation (P), soil water content, and P/ET0 at the Yan'an site. Sap flow response to meteorological factors showed less discrepancy between pre- and post-rainfall periods at the Yan'an site. Moreover, canopy conductance fluctuated less with a wider range of vapor pressure deficit (VPD) and the slope of canopy resistance as a function of VPD was lower, indicating relatively lower sensitivity of stomatal conductance to environmental factors in Yan'an site. Physiological parameters, except for predawn leaf water potential, were significantly different between the two sites. The results suggested that black locust tended to reduce transpiration, modify leaf morphology, and improve water use efficiency to enhance its adaptability to the dryer site. The species changes stomatal regulation characteristics and general growth rate to acclimatize to distinct water habitats.
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U2 - 10.1016/j.agwat.2021.107402
DO - 10.1016/j.agwat.2021.107402
M3 - Article
AN - SCOPUS:85121269601
VL - 262
JO - Agricultural Water Management
JF - Agricultural Water Management
SN - 0378-3774
M1 - 107402
ER -
