Soil water resources use limit in the loess plateau of China

Ning, Ting; Guo, Zhongsheng; Guo, Mancai; Han, Bing

doi:10.4236/as.2013.45b019

Cited by 10 publications

(7 citation statements)

References 11 publications

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“…Most commonly, the dominant species of natural restored grassland (from abandoned slope farmland) are forage grasses, and artificial shrubland restoration uses Caragana korshinskii (Wang et al, 2009b;Yao et al, 2012). Precipitation is the only source of soil water that can be used by plants in this area (Jiao et al, 2006;Ning et al, 2013;Yan et al, 2015;Yu et al, 2015b). Due to the close relationship between plant growth and soil water content (Wang et al 2012), studies of soil water under typical vegetation types in this region have changed from focusing on water content to water movement and hydraulic characteristics (Lü et al, 2014a;Shao et al, 2006).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year

Zhang

Zhao

Wang

et al. 2019

Science of The Total Environment

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In the context of global climate change as well as local climate warming and drying on the Loess Plateau of China, understanding the relationship between soil particle size and soil water distribution during years of atypical precipitation is important. In this study, fractal geometry theory is used to describe the mechanical composition and texture of soils to improve our understanding of hydropedology and ecohydrology in the critical zone on the Loess Plateau. One grassland slope and two shrubland slopes were selected in the hilly and gully region of the Loess Plateau, and soils were sampled along hillslope transects at depths of 0-500 cm. Fractal theory and redundancy analysis (RDA) were used to identify relationships between the fractal dimension of soil particle-size distributions and the corresponding van Genuchten parameters for the soil-water-characteristic curves. The oven-drying method was used to measure soil water content, and the high-speed centrifugation method was used to generate soil-water-characteristic curves. The results show that (1) the soil water that can be used by Caragana korshinskii during a drought year is distributed below 2 m from the surface, whereas the soil water that can be used by grass is below 1.2 m; (2) Caragana korshinskii promotes the conservation of fine soil particles more than does natural restored grass, and the soil particle-size distribution fractal dimension changes with depth and position; and (3) soil hydraulic properties correlate strongly with soil pedological properties such as bulk density and the soil particle-size distribution fractal dimension. These results provide a case study of the relationships among soil distributions, hydrologic and geomorphic processes for vegetation restoration in drylands with a thick vadose zone. More studies on soil property changes are needed to provide case studies and empirical support for ecological restoration in the Loess Plateau of China.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year

Zhang

Zhao

Wang

et al. 2019

Science of The Total Environment

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“…In Loess Hilly region of China, soil moisture is one of the most limiting factors that determine plant growth and productivity [16] . In most cases, soil moisture is in a water-deficit stress for plant growth in this area.…”

Section: Introductionmentioning

confidence: 99%

Responses of Reactive Oxygen Scavenging Enzymes, Proline and Malondialdehyde to Water Deficits among Six Secondary Successional Seral Species in Loess Plateau

Shi

Zhang

et al. 2014

PLoS ONE

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Drought can impact local vegetation dynamics in a long term. In order to predict the possible successional pathway of local community under drought, the responses of some drought resistance indices of six successional seral species in the semi-arid Loss Hilly Region of China were illustrated and compared on three levels of soil water deficits along three growing months (7, 8 and 9). The results showed that: 1) the six species had significant differences in SOD, POD activities and MDA content. The rank correlations between SOD, POD activities and the successional niche positions of the six species were positive, and the correlation between MDA content and the niche positions was negative; 2) activities of SOD, CAT and POD, and content of proline and MDA had significant differences among the three months; 3) there existed significant interactions of SOD, CAT, POD activities and MDA content between months and species. With an exception, no interaction of proline was found. Proline in leaves had a general decline in reproductive month; 4) SOD, CAT, POD activities and proline content had negative correlations with MDA content. Among which, the correlation between SOD activity and MDA content was significant. The results implied that, in arid or semiarid region, the species at later successional stage tend to have strong drought resistance than those at early stage. Anti-drought indices can partially interpret the pathway of community succession in the drought impacted area. SOD activity is more distinct and important on the scope of protecting membrane damage through the scavenging of ROS on exposure to drought.

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“…The combination of excessive evapotranspiration and an inadequate water supply has caused large-scale soil degradation and reductions in vegetation in perennial forestlands, which can subsequently influence the land-water cycle. Using soil moisture resources sustainably is crucial for the sustainable management of forests and vegetation in water-limited areas [4][5][6].…”

Section: Forewordmentioning

confidence: 99%

One-Compartment Soil Water Model for Forestlands in Water-Limited Regions

Saike¹,

Guo²,

Guo³

2019

Insights For Res

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Understanding the vertical distribution dynamics of soil moisture is essential for estimating soil water resources, controlling soil degradation and regulating the relationship between soil water and plant growth in water-limited regions. There have been a few studies of the vertical change of soil moisture in forestlands, but there are few models that can suitably describe the vertical change of soil moisture under different conditions. In this study, a one-compartment soil water model (OCSWM) was developed, and soil moisture data collected in a shrub forest were used to test the model. The results showed that the OCSWM can better express the vertical change of soil moisture under different conditions compared with the two-compartment soil water model (TCSWM) in terms of describing the vertical change of soil moisture under different situations in the shrub forest. The OCSWM has good application value in estimating some important parameters of soil water management for the sustainable management of forests in water-limited regions.

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Soil water resources use limit in the loess plateau of China

Cited by 10 publications

References 11 publications

Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year

Relationship between soil water content and soil particle size on typical slopes of the Loess Plateau during a drought year

Responses of Reactive Oxygen Scavenging Enzymes, Proline and Malondialdehyde to Water Deficits among Six Secondary Successional Seral Species in Loess Plateau

One-Compartment Soil Water Model for Forestlands in Water-Limited Regions

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