Differentiated responses of daytime and nighttime sap flow to soil water deficit in a larch plantation in Northwest China

Liu, Zebin; Yu, Songping; Xu, Lihong; Wang, Yanhui; Yu, Pengtao; Chao, Yang

doi:10.1016/j.agwat.2023.108540

Cited by 6 publications

(3 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, while many studies have demonstrated the importance of soil water stress on V [25,39,[63][64][65][66], the influence of other soil factors (such as soil temperature) on V cannot be ignored. The present study found that soil temperature had a greater impact on V than the other two factors, which was consistent with the results of Sun et al (2022).…”

Section: Responds To Environmental Factorsmentioning

confidence: 99%

“…The physiological structure of plants (such as leaf area index, sapwood, crown width, and phenology) determines their potential for transpiration [15][16][17][18]. Environmental factors that impact V include meteorological factors, such as temperature (Ta), total solar irradiance (TSI), relative humidity (RH), vapour pressure deficit (VPD), wind speed (WS), and precipitation (P), which determine the instantaneous changes in transpiration and are the main driving force of canopy transpiration [19][20][21][22][23][24], and soil factors, such as soil moisture content and soil temperature, which determine the peak and total transpiration of plants [25][26][27]. In particular, when soil moisture is limited, the hydraulic resistance of the soil and roots increases, leading to delayed water transport and stomatal closure [28,29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Response of Typical Tree Species Sap Flow to Environmental Factors in the Hilly Areas of Haihe River Basin, China

Han,

Wang,

Zhao

et al. 2024

Forests

View full text Add to dashboard Cite

Understanding developments in the trunk sap flow of prevalent tree species within the hilly areas of the Haihe River basin is imperative for ecosystem conservation. Nevertheless, the changes in sap flow of local trees and their response to environmental factors remain elusive. This study focuses on seven dominant tree species in the hilly area of the Haihe River basin and analyzed the relationship between tree sap flow rate and environmental factors at different time scales (hourly and daily). Our findings suggested: (1) Regardless of the time scale, total solar irradiance played a primary role in influencing sap flow rate. Conversely, as the time scale grew, the associations between most soil factors and sap flow rate enhanced, while those with meteorological factors declined. Notably, soil temperature exerted a more profound influence on sap flow rate than soil moisture and conductivity. (2) At the hourly scale, the sap flow rate of each species had a lag effect of 1–2 h with vapour pressure deficit, relative humidity and temperature, and 1 h or no lag effect with total solar irradiance and wind speed. (3) The response model of sap flow rate and environmental factors showed that, except for Pinus tabuliformis Carr., other tree species fit well at various time scales (R2 ≥ 0.59). As the time scale of most tree species increased from hourly scale to daily scale, the fit gradually weakened. Concurrently, considering the time-lag effect, the accuracy of the model has been improved, and the fitting accuracy of Koelreuteria paniculata Laxm. and Pinus tabuliformis Carr. has been significantly improved.

show abstract

Section: Responds To Environmental Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of Typical Tree Species Sap Flow to Environmental Factors in the Hilly Areas of Haihe River Basin, China

Han,

Wang,

Zhao

et al. 2024

Forests

View full text Add to dashboard Cite

show abstract

“…Because of the different physiological significance of Qn and Rn on plant survival, studies have quantified and analyzed the influencing factors of these two components. According to the positive relationship between the VPD and En ( Fuentes et al., 2013 ; Yu et al., 2018 ; Liu et al., 2023b ), the relationship between VPD and En could determine the proportions of Qn and Rn. When VPD was low or close to zero, the values of En were almost the same as those of Rn.…”

Section: Introductionmentioning

confidence: 99%

The dynamics of nocturnal sap flow components of a typical revegetation shrub species on the semiarid Loess Plateau, China

Fang,

Liu,

et al. 2024

Front. Plant Sci.

View full text Add to dashboard Cite

IntroductionThe components of nighttime sap flux (En), which include transpiration (Qn) and stem water recharge (Rn), play important roles in water balance and drought adaptation in plant communities in water-limited regions. However, the quantitative and controlling factors of En components are unclear.MethodsThis study used the heat balance method to measure sap flow density in Vitex negundo on the Loess Plateau for a normal precipitation year (2021) and a wetter year (2022).ResultsThe results showed that the mean values were 1.04 and 2.34 g h-1 cm-2 for Qn, 0.19 and 0.45 g h-1 cm-2 for Rn in 2021 and 2022, respectively, and both variables were greater in the wetter year. The mean contributions of Qn to En were 79.76% and 83.91% in 2021 and 2022, respectively, indicating that the En was mostly used for Qn. Although the vapor pressure deficit (VPD), air temperature (Ta) and soil water content (SWC) were significantly correlated with Qn and Rn on an hourly time scale, they explained a small fraction of the variance in Qn on a daily time scale. The main driving factor was SWC between 40-200 cm on a monthly time scale for the Qn and Rn variations. Rn was little affected by meteorological and SWC factors on a daily scale. During the diurnal course, Qn and Rn initially both declined after sundown because of decreasing VPD and Ta, and Qn was significantly greater than Rn, whereas the two variables increased when VPD was nearly zero and Ta decreased, and Rn was greater than Qn.DiscussionThese results provided a new understanding of ecophysiological responses and adaptation of V. negundo plantations to increasing drought severity and duration under climate changes.

show abstract

Spatiotemporal variations in sap flow in a larch plantation: sampling size for stand scale estimates

Liu,

Yu,

et al. 2024

J. For. Res.

View full text Add to dashboard Cite

Differentiated responses of daytime and nighttime sap flow to soil water deficit in a larch plantation in Northwest China

Cited by 6 publications

References 74 publications

Response of Typical Tree Species Sap Flow to Environmental Factors in the Hilly Areas of Haihe River Basin, China

Response of Typical Tree Species Sap Flow to Environmental Factors in the Hilly Areas of Haihe River Basin, China

The dynamics of nocturnal sap flow components of a typical revegetation shrub species on the semiarid Loess Plateau, China

Spatiotemporal variations in sap flow in a larch plantation: sampling size for stand scale estimates

Contact Info

Product

Resources

About