Comparison of deep soil moisture in two re-vegetation watersheds in semi-arid regions

Yang, Lei; Chen, Liding; Wei, Wei; Yu, Yang; Zhang, Handan

doi:10.1016/j.jhydrol.2014.03.049

Cited by 83 publications

(62 citation statements)

References 34 publications

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“…Introduced shrubs lead to dried soil in the deep profile (100-340 cm depth) during their growing seasons, compared with abandoned lands (Figure 2). Previous studies also reported that introduced shrub, forest, and grass had consistently lower SWCs than farmland and abandoned land [27,36]. This might be due to higher potential evapotranspiration under introduced vegetation [36].…”

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 76%

“…Previous studies also reported that introduced shrub, forest, and grass had consistently lower SWCs than farmland and abandoned land [27,36]. This might be due to higher potential evapotranspiration under introduced vegetation [36]. However, the degree of drought varied with the different shrubs.…”

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 81%

“…A negative relationship between deep soil moisture and the age of plants has been found in a recent study [35]. In many parts of semiarid regions, introduced shrubs cannot obtain sufficient water for their growth due to limited rainfall [36]. These shrubs are forced to develop deep root systems to utilize deep soil moisture [6,37].…”

Section: Introductionmentioning

confidence: 91%

“…In the Loess Plateau, most rainfall occurs during the periods from July to September [36]. Introduced shrubs lead to dried soil in the deep profile (100-340 cm depth) during their growing seasons, compared with abandoned lands (Figure 2).…”

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 99%

“…The soil under CK was drier than that under HR (Figure 2). The roots of the introduced vegetation (CK and HR) selected in this study were mainly distributed in the 0-100 cm layer; however, these species have deep root systems below the rainfall infiltration depth and absorbed more deep soil water than the abandoned land [36]. Different plant functional types allocate roots to different soil depths to obtain access to water [52].…”

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 99%

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Soil Water Storage Changes within Deep Profiles under Introduced Shrubs during the Growing Season: Evidence from Semiarid Loess Plateau, China

Liu

Zhao

Zhang

et al. 2016

Water

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Water stored deep in the soil profile is the primary bio-available reservoir for regional vegetation in the semiarid Loess Plateau of China. However, the planting of introduced shrubs over many years as part of the "Grain to Green Program (GGP)" has consistently lead to dried soil in areas with severe water scarcity. Knowledge of soil water storage (SWS) changes within deep profiles in water-deficient regions is critical for the sustainable development of vegetation restoration. Caragana korshinskii K. (CK) and Hippophae rhamnoides L. (HR) are widely planted in the Loess Plateau to control soil erosion. We selected these two shrubs for a study on variations in deep soil water (100-500 cm) and identified the main factors affecting deep soil water storage replenishment (SWSR) during their growing seasons. The results indicated that the mean SWS at 100-500 cm depth under HR was significantly higher than that under CK at both the beginning (352.74 mm for CK and 644.79 mm for HR) and end of the growing season (311.95 mm for CK and 529.05 mm for HR) (p < 0.01). In these ecosystems, SWS was only recharged below 340 cm under CK, which was due to vegetation characteristics. Under HR, however, soil water consumption exceeded recharge throughout the whole 100-500 cm profile. The SWSR at the 100-340 cm depth was mainly affected by sand content, which explained 28% of the variability of SWSR. At the 340-500 cm depth, the variability in SWSR was due to vegetation type. Therefore, expansion of the GGP should pay more attention to both soil water conditions and influencing factors, including appropriate vegetation selection and the altering of the microtopography.

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Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 76%

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 81%

Section: Introductionmentioning

confidence: 91%

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 99%

Section: Relationships Between Introduced Vegetation and Dried Soil Imentioning

confidence: 99%

See 3 more Smart Citations

Soil Water Storage Changes within Deep Profiles under Introduced Shrubs during the Growing Season: Evidence from Semiarid Loess Plateau, China

Liu

Zhao

Zhang

et al. 2016

Water

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Soil water depletion and recharge under different land cover in China's Loess Plateau

et al. 2015

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Vegetation restoration can greatly influence water infiltration and root water uptake depths in semi-arid regions. Soil water dynamics within different vegetated/non-vegetated land cover patterns were studied over time from 2008 to 2013 in an erodible small watershed on the Loess Plateau of China. Results showed that distinct differences in soil water dynamics and water balances existed among different vegetation types. Soil water recharge depths extended deeper than 5 m under bare land and farmland, but introduced forage (alfalfa) and shrub (caragana) species depleted the soil water stores in the 0-to 6-m layers within a few years, prevented deep soil water recharge and exhibited negative water balances. Local food crops can maintain a sustainable soil water balance although there was low productivity. Native grasses should be the best land use type for this region based on the soil water balances observed in this short field study. Because it was difficult to avoid soil desiccation under introduced vegetation, vegetation with high water demands should be combined with shallow rooting plants, and water-saving methods should be taken into account.

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Soil moisture variations in response to precipitation in different vegetation types: A multi‐year study in the loess hilly region in China

et al. 2020

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Vegetation restoration has been widely implemented as an effective approach to the control of soil erosion. However, severe soil desiccation is likely to occur if vegetation types and local precipitation conditions are not accounted for. In this study, an abandoned farmland and three typical vegetation types, including a natural shrubland, a plantation of black locust, and a natural oak secondary forest, were investigated to determine the characteristics of soil moisture in different hydrological years. The responses of soil moisture to precipitation were analysed at different timescales. Higher soil water contents were observed either in wet years or for natural vegetation types. The temporal response of soil moisture to precipitation was largely dependent on the timescale. At monthly scale, shallow soil moisture (0–100 cm) varied consistently with precipitation, whereas on interannual scale, precipitation is positively related to soil moisture along the whole profiles. Black locust and oak lands consumed more soil moisture than the shrubland, and severe soil desiccation developed in deep soil layers in the black locust plantation. The shrubland showed steeper regression slopes than other types for both the changes in soil water storage over time (ΔSWSt) versus the growing season precipitation and the difference in soil water storage with the abandoned farmland (ΔSWSv) versus the growing season precipitation, suggesting its higher adaptability to precipitation changes in this region. The results indicate that the shrubland develops optimal water use strategies through coevolution with local conditions and should be given precedence in vegetation restoration initiatives in this region.

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Comparison of deep soil moisture in two re-vegetation watersheds in semi-arid regions

Cited by 83 publications

References 34 publications

Soil Water Storage Changes within Deep Profiles under Introduced Shrubs during the Growing Season: Evidence from Semiarid Loess Plateau, China

Soil Water Storage Changes within Deep Profiles under Introduced Shrubs during the Growing Season: Evidence from Semiarid Loess Plateau, China

Soil water depletion and recharge under different land cover in China's Loess Plateau

Soil moisture variations in response to precipitation in different vegetation types: A multi‐year study in the loess hilly region in China

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