Xylem sap flows of irrigated <i>Tamarix elongata Ledeb</i> and the influence of environmental factors in the desert region of Northwest China

Qu, Yanping; Kang, Shaozhong; Li, Fusheng; Zhang, Jianhua; Xia, Guimin; Li, Wangcheng

doi:10.1002/hyp.6314

Cited by 23 publications

(28 citation statements)

References 20 publications

(27 reference statements)

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“…Sap flow measurements have been widely used to study plant response to environment factors (Cermak et al, 2004;Bai et al, 2005;Chabot et al, 2005;Qu et al, 2007;Chen et al, 2008;Xia et al, 2008). In our experiment, the diurnal stem sap flux of Artemisia ordosica varied regularly and showed consistent patterns of day and night cycles with different stem diameters.…”

Section: Discussionsupporting

confidence: 49%

“…In our study, sap flow rate had similar tendency with different diameters as shown in Figure 1; therefore, sapwood area could be used as a reasonable scalar for upscaling in Artemisia ordosica. During the entire experimental period, the mean trunk sap flux of Artemisia ordosica was 190Ð175 g/day, and decreased from May to October mainly due to the low temperature and photosynthesis (Qu et al, 2007). There was a significant linear relationship between sap velocity and the evapotranspiration rate ET 0 , with a correlation coefficient of R 2 D 0Ð6368 in the daily time scale.…”

Section: Discussionmentioning

confidence: 98%

“…Rates of plant response to rainfall pulses could potentially differ depending on species or plant functional types; if the size of the pulse was below a threshold, there would be no response evident (Morgan and Barton, 2008;Zeppel et al, 2008). The variation of sap flow in tree species was related not only to their biological and physiological characteristics, such as canopy structure, stomatal closure and root hydraulic conductance, but also to environmental factors (Qu et al, 2007). Chen et al (2008) found that air temperature, relative humidity and solar radiation were the principal impact factors of the sap flow of Salix matsudana.…”

Section: Discussionmentioning

confidence: 98%

“…Chen et al (2008) found that air temperature, relative humidity and solar radiation were the principal impact factors of the sap flow of Salix matsudana. In other studies, the order of the most significant environmental factors affecting the sap flux of H. ammodendron was as follows: air temperature > solar radiation > soil moisture content ; T. elongata Ledeb trees: solar radiation > air temperature > vapour pressure deficit > RH > wind speed (Qu et al, 2007); and Caragana korshinskii were: VPD > solar radiation > air temperature > wind speed (Xia et al, 2008). In our study, environmental factors that determined the daily sap flow rate of Artemisia ordosica were in the following order: solar radiation > VPD > RH > air temperature > wind speed.…”

Section: Discussionmentioning

confidence: 98%

“…Sap flow of some typical desert pants such as Caragana korshinski, Tamarix elongate Ledeb, Populus euphrtaicr, Elaeag nusangastif olia were analysed using the heat pulse method (Zhang et al, 2003;Qu et al, 2007;Xia et al, 2008), but there is little information about Artemisia ordosica mainly due to its tiny branches. Wang et al (2004) have studied the evapotranspiration of Artemisia ordosica using the auto-weighing lysimeters in stabilized arid desert dune; it was not accurate because it failed to separate plants' transpiration from soil evaporation.…”

Section: Introductionmentioning

confidence: 99%

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Sap flow of Artemisia ordosica and the influence of environmental factors in a revegetated desert area: Tengger Desert, China

Huang¹,

Zhang²,

Li³

2010

Hydrological Processes

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Abstract:Artemisia ordosica is considered as an excellent sand-fixing plant in revegetated desert areas, which plays a pertinent role in stabilizing the mobile dunes and sustaining the desert ecosystems. Stem sap flows of about 10-year-old Artemisia ordosica plants were monitored continuously with heat balance method for the entire growing season in order to understand the water requirement and the effects of environmental factors on its transpiration and growth. Environment factors such as solar radiation, air temperatures, relative humidity, wind speed and precipitation were measured by the eddy covariance. Diurnal and seasonal variations of sap flow rate with different stem diameters and their correlation with meteorological factors and reference evapotranspiration were analysed. At the daily time scale, there was a significantly linear relationship between sap flow rate and reference evapotranspiration with a correlation coefficient of R 2 D 0Ð6368. But at the hourly time scale, the relationship of measured sap flow rate and calculated reference evapotranspiration (ET 0 ) was affected by the precipitation. A small precipitation would increase the sap flow and the ET 0 ; however, when the precipitation is large, the sap flow and ET 0 decrease. Leaf area index had a coincident variation with soil water content; both were determined by the precipitation, and meteorological factors were the most significant factors that affected the sap flow of Artemisia ordosica in the following order: solar radiation > vapour pressure deficit > relative humidity > air temperature > wind speed. The close correlation between daily sap flow rate and meteorological factors in the whole growing season would provide us an accurate estimation of the transpiration of Artemisia ordosica and rational water-carrying capacity of sand dunes in the revegetated desert areas.

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Section: Discussionsupporting

confidence: 49%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sap flow of Artemisia ordosica and the influence of environmental factors in a revegetated desert area: Tengger Desert, China

Huang¹,

Zhang²,

Li³

2010

Hydrological Processes

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The response of sap flow in desert shrubs to environmental variables in an arid region of China

2011

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A case study was conducted in a desert-oasis ecotone in the middle of China's Heihe River basin to reveal the response of sap velocity to environmental variables. We measured sap flow in the branches and stems of desert shrubs (Nitraria sphaerocarpa and Elaeagnus angustifolia) using sap-flow gauges, and simultaneously measured environmental variables at the study site. The relationships between sap velocity and the environmental variables were analysed using redundancy analysis. The diurnal variation in sap velocity was best described by a bimodal curve, except for the branches of N. sphaerocarpa, which followed a unimodal curve. Sap flow began about 1 h earlier in the branches than in the stems. The dynamic variations in sap velocity were remarkably similar for the two species at a given position (stem vs branch) but differed between the two positions for each species. Redundancy analysis and Kendall's tau analysis indicated that precipitation had the greatest influence on sap velocity in the stem, whereas precipitation duration significantly affected sap velocity in the branches of the desert shrubs (R 2 D 0Ð85 and 0Ð73, respectively). The variation in sap velocity could be described by a multiple linear regression against the meteorological variables, and the simulated value was significantly linearly correlated with the measured value (0Ð861 Ä R 2 Ä 0Ð938, P < 0Ð0001).

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Sap flow and plant water sources for typical vegetation in a subtropical humid karst area of southwest China

Zeng

et al. 2021

Hydrological Processes

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Plant water use plays a crucial part in the soil-plant-atmosphere continuum. However, in karst regions, plants frequently suffer from water shortages due to low soil water storage capacity. Therefore, it is necessary to understand plant water consumption (as determined by sap flow) and seasonal variation of water sources to improve water management in karst catchments. In this study, thermal dissipation probes (TDP), calibrated using empirical equations, were used to measure the sap flow of three typical woody vegetations, including Coriaria nepalensis (sparse-shrub), Toona sinensis (secondary forest) and Populus adenopoda (shrub-grass). Oxygen and hydrogen stable isotopes were used to analyze seasonal variation of plant water sources. The results showed that: (1) T. Sinensis (3.89 ± 3.87 LÁday −1) had significantly higher daily sap flow than C. nepalensis (0.33 ± 0.37 LÁday −1) and P. adenopoda (0.09 ± 0.12 LÁday −1); (2) daily sap flow was closely correlated to photosynthetically active radiation (PAR) and vapour pressure deficit (VPD); (3) over the entire study period, plants mainly used water from the surface soil horizons; and (4) a greater proportion of epikarst water was used for C. nepalensis than by T. sinensis and P. adenopoda over the whole growth stage, and more epikarst water was used in early and mid-growth stages compared to the late stage for the three species. This study contributes to a deeper understanding of the plant water use strategies in karst regions, and is helpful for ecosystem management.

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Xylem sap flows of irrigated Tamarix elongata Ledeb and the influence of environmental factors in the desert region of Northwest China

Cited by 23 publications

References 20 publications

Sap flow of Artemisia ordosica and the influence of environmental factors in a revegetated desert area: Tengger Desert, China

Sap flow of Artemisia ordosica and the influence of environmental factors in a revegetated desert area: Tengger Desert, China

The response of sap flow in desert shrubs to environmental variables in an arid region of China

Sap flow and plant water sources for typical vegetation in a subtropical humid karst area of southwest China

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