Water uptake from different soil depths for halophytic shrubs grown in Northern area of Ningxia plain (China) in contrasted water regimes

Zhu, Lin; Wang, Zheng Hong; Mao, Gui Lian; Zheng, S.; Xu, Xiuhong

doi:10.1080/17429145.2012.751139

Cited by 13 publications

(12 citation statements)

References 31 publications

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“…Xylem water in the arid and cold zones had lower d‐excess values (Table ). This is consistent with Bertrand et al (), Yang and Fu (), and Zhu, Wang, Mao, Zheng, and Xu () and values reported for the tropical and temperate zone (Goldsmith et al, ; Hervé‐Fernández et al, ; Rosado, De Mattos, & Sternberg, ). The patterns between climate zones largely reflect those found in the soil water and indicate more fractionation with aridity.…”

Section: Discussionsupporting

confidence: 91%

Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach

et al. 2020

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The depth distribution of soil water contributions to plant water uptake is poorly known. Here we evaluate the main water sources used by plants at the global scale and the effect of climate and plant groups on water uptake variability and depth distribution. The global meta‐analysis is based on isotope data (δ2H and δ18O) extracted from 65 peer‐reviewed papers published between 1990 and 2017. We applied a new direct inference method to quantify the overlap between xylem water and soil water sources used by plants. The median overlap between xylem water and soil water at different depths varied between 28% and 100%, but they were generally >50%. The shallow (0‐10 cm) soil water overlap with xylem water was largest in cold regions (100% ± 0%) and lowest at tropical sites (about 28%). Conversely, the median overlap between xylem water and deep soil water was largest in the arid and the tropical zones (>75%) and much smaller in the temperate and cold zones. Our results suggest that the isotopic composition of xylem water reflects mostly the signature of shallow soil water (<30 cm) in the cold and the temperate zones, whereas in the arid and the tropical zones, plants appear to exploit water in deeper soil layers. Our novel, simple statistically‐based direct inference method performed well in determining these differences in water sources, and can be applied more widely to isotope‐based plant water uptake studies.

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Section: Discussionsupporting

confidence: 91%

Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach

et al. 2020

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“…As shown in this result, there is an isotopic enrichment (i.e. enriched in heavy isotopes, 18 O and 2 H) of soil water from the surface layer due to evaporation, which is consistent with other reports (Eggemeyer et al, 2009;Saha et al, 2009;Zhu et al, 2014). The values of groundwater isotopic compositions were relatively low and varied insignificantly during the study period, implying the groundwater experienced less evaporation, with δD and δ 18 O plotted closed to the LMWL in arid region of Northwest China.…”

Section: Sources Of Soil Watersupporting

confidence: 91%

“…6). The movement of soil water vertically would recompose the soil isotopic profile by replacement of "old soil water" with new infiltrating water (Tang and Feng, 2001;Eggemeyer et al, 2009;Zhu et al, 2014), resulting in abrupt changes in isotopic compositions in some layers. Presumably, the isotopic-enriched rainwater precipitated during the late May would move from upper layers downwards, which resulted in an increase in the isotopic compositions in a certain soil layer.…”

Section: Sources Of Soil Watermentioning

confidence: 99%

Seasonal patterns in water uptake for Medicago sativa grown along an elevation gradient with shallow groundwater table in Yanchi county of Ningxia, Northwest China

et al. 2016

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Lucerne (Medicago sativa L.) is a deep-rooted perennial leguminous forage with high evapo-transpiration rate exceeding the annual precipitation in semi-arid areas of Northwest China. Groundwater might be the potential water sources of lucerne in the area with shallow groundwater table. In this study, stable isotopic compositions of oxygen and hydrogen (δ 18 O and δD) of different water sources and xylem sap were analyzed to determine the seasonal (April, June, July and August) and topographic (three slope positions) variations in water sources for lucerne growing in Ningxia eastern semi-arid area adjacent to Mu Us Desert characterized by shallow groundwater table. IsoSource software was used to calculate the probable contribution of different water sources to the total plant water uptake. Stomatal conductance, stem water potential, carbon isotope discrimination (∆ 13 C) of whole plant were also determined for evaluating the water status of lucerne growing at different slope positions. The results showed that soil water content increased as the elevation decreased. Oxygen compositions of soil water in the 0-40 cm profile fluctuated considerably. Soil water δ 18 O values in deep profile (>3.5 m) were similar to those in groundwater, implying the recharge of groundwater to this soil layer. Highest water utilization rate from deep soil profile (below 350 cm) was recorded for lucerne grown at the slope position 1 (groundwater table depth of 3.5-3.9 m) in April, June and July. The lucernes at slope position 2 (groundwater table depth of 5.8-6.4 m) and slope position 3 (groundwater table depth 7.1-8.3 m) mostly used water from deep soil layers (below 350 cm) during dry period, and turned to use water from superficial soil layer in wet period. Higher yield, ∆ 13 C value of whole plant and stomatal conductance were observed for lucerne grown at the slope position 1 than those at other slope positions. These results indicated that groundwater is a significant water source for transpiration of lucerne grown in Ningxia semi-arid area with shallow groundwater table where lucerne grassland is suggested to be established so as to obtain better yield performance.

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“…Intense evaporation made the classification of data for the soil surface fragmented. A series of studies were conducted on a small scale and provided references for soil classification [13,25,[48][49][50][51][52][53][54][55][56][57]. Combing previous studies and the results of cluster analysis allowed for valid and reliable soil classification (Table 2).…”

Section: Meteoric Water Linementioning

confidence: 99%

Plant Water Use Strategy in Response to Spatial and Temporal Variation in Precipitation Patterns in China: A Stable Isotope Analysis

Zhao

Wang

2018

Forests

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Spatial and temporal variation in precipitation patterns can directly alter the survival and growth of plants, yet in China there is no comprehensive and systematic strategy for plant use based on the effects of precipitation patterns. Here, we examined information from 93 published papers (368 plant species) on plant xylem water stable isotopes (δD and δ 18 O) in China. The results showed that: (1) The slope of the local meteoric water line (LMWL) gradually increased from inland areas to the coast, as a result of continental and seasonal effects. The correlation between δD and δ 18 O in plant stem water is also well fitted and the correlation coefficients range from 0.78 to 0.89. With respect to the soil water line, the δ 18 O values in relation to depth (0-100 cm) varied over time; (2) Plants' main water sources are largely affected by precipitation patterns. In general, plants prioritize the use of stable and continuous water sources, while they have a more variable water uptake strategy under drought conditions; (3) There are no spatial and temporal variations in the contribution of the main water source (p > 0.05) because plants maintain growth by shifting their use of water sources when resources are unreliable.Keywords: stable isotope; local meteoric water line (LMWL); plant main water source (PMWS); contribution of plant main water source (CPMWS); China

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Water uptake from different soil depths for halophytic shrubs grown in Northern area of Ningxia plain (China) in contrasted water regimes

Cited by 13 publications

References 31 publications

Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach

Depth distribution of soil water sourced by plants at the global scale: A new direct inference approach

Seasonal patterns in water uptake for Medicago sativa grown along an elevation gradient with shallow groundwater table in Yanchi county of Ningxia, Northwest China

Plant Water Use Strategy in Response to Spatial and Temporal Variation in Precipitation Patterns in China: A Stable Isotope Analysis

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