Soil organic carbon change relating to the prevention and control of rocky desertification in Guizhou Province, SW China

Huang, Xianfei; Wang, Shijie; Zhou, Yunchao

doi:10.1504/ijgw.2018.093123

Cited by 11 publications

(17 citation statements)

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“…The SOC contents in different karst landforms can be compared with those in karst basins. The regular spatial distribution of the SOC in different soil horizons in different karst landforms is similar to that in the Houzhai River Basin, and the spatial heterogeneity of SOC in the upper soil layers is higher than that in the lower soil layers [27]. The SOC content gradually decreases with increasing soil depth under different land use types and vegetation types.…”

Section: Comparison With Other Karst Mountainous Areasmentioning

confidence: 55%

“…The soil bulk density (SBD) of each soil layer was determined via the cutting ring method [17]. The rock exposure rates around the sampling sites were assessed by the line-transect method, and the line length was set to 10 m [24,27]. Soil samples were packed into sealed bags and numbered, and the weight of each sample was approximately 1 kg.…”

Section: Soil Sample Collection and Testmentioning

confidence: 99%

“…The main soil properties in karst mountainous areas include SBD, rock exposure and rock content, which are three important factors that affect SOC in karst areas [18,24,27]. The spatial distribution characteristics of SBD, rock exposure and rock content are shown in Figure 2.…”

Section: The Spatial Distribution Characteristics Of Soil Propertiesmentioning

confidence: 99%

“…The correlation information among the SOC content and SBD, rock exposure rate and rock content are listed in Figure 4. In the topsoil, land use is a determining factor of the effects on SOC [27]. SBD, rock exposure and rock content are important factors affecting land, resulting in land being used for different functions.…”

Section: The Spatial Distribution Characteristics Of Soc In Differentmentioning

confidence: 99%

“…The content of SOC is influenced by multiple environmental factors and its high spatial heterogeneity in karst mountainous areas, so sensitive methods to calculate SOC content are essential [26]. Obviously, many scholars have researched the diversity in the spatial distribution of the SOC content and its impact factors in karst mountainous areas [27][28][29]. However, there are few reports about the spatial heterogeneity of the SOC distribution and its impact factors in topsoil under different karst landforms.…”

Section: Introductionmentioning

confidence: 99%

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The Spatial Distribution Characteristics of Soil Organic Carbon and Its Effects on Topsoil under Different Karst Landforms

Wang

Huang

Ji-wei

et al. 2020

IJERPH

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Karst landforms are widely distributed in Guizhou Province, and the karst terrain is complex. To investigate the spatial distribution characteristics of soil organic carbon (SOC) in topsoil in different karst landforms, a total of 920 samples were taken from different karst landforms. The study areas, Puding, Xingyi, Guanling, Libo and Yinjiang in Guizhou Province, represent the karst plateau (KP), karst peak-cluster depression (KPCD), karst canyon (KC), karst virgin forest (KVF) and karst trough valley (KTV) landforms, respectively. The characteristics of the SOC contents in areas with different vegetation, land use and soil types under different karst landforms were analyzed. The dimensionality of the factors was reduced via principal component analysis, the relationships among SOC content and different factors were subjected to redundancy analysis, and the effects of the main impact factors on SOC were discussed. The results showed that there was a large discrepancy in the SOC contents in the topsoil layers among different types of karst landforms, the changes in the SOC content in the topsoil layer were highly variable, and the discrepancy in the upper soil layer was higher than that in the lower soil layer. The SOC contents in the 0–50 cm topsoil layers in different karst landforms were between 7.76 and 38.29 g·kg−1, the SOC content gradually decreased with increasing soil depth, and the descending order of the SOC contents in different karst landforms was KTV > KVF > KC > KPCD > KP.

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Section: Comparison With Other Karst Mountainous Areasmentioning

confidence: 55%

Section: Soil Sample Collection and Testmentioning

confidence: 99%

Section: The Spatial Distribution Characteristics Of Soil Propertiesmentioning

confidence: 99%

Section: The Spatial Distribution Characteristics Of Soc In Differentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Spatial Distribution Characteristics of Soil Organic Carbon and Its Effects on Topsoil under Different Karst Landforms

Wang

Huang

Ji-wei

et al. 2020

IJERPH

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Factors influencing the evolution of human‐driven rocky desertification in karst areas

2020

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Karst rocky desertification has become one of the most important e‐environmental problems in China. The mechanisms of rocky desertification caused by land resources use, settlement expansion, population growth, and corresponding ecological responses are unclear. High‐resolution images of a typical karst plateau (Houzhai River Basin) acquired in 1978, 2005, and 2010 and data samples collected in the field in 2015 were used to quantitatively study the factors governing the evolution of rocky desertification driven by human activities. They comprehensively reveal its causes and influencing factors. Results suggest that the rocky desertification in the eastern and southern parts was, generally, more severe than in the western and northern parts of the study region. In the period from 1978 to 2015, no significant changes in the degree of (moderate) rocky desertification were observed. However, decreasing trends were observed for the no‐rocky areas, and slight decrease in rocky areas. The comprehensive indices of rocky desertification in 1978, 2005, 2010, and 2015 were 1.33, 1.24, 1.22, and 1.24, respectively. The rock outcrops in the no‐rocky desertification and potential rocky desertification areas were closely associated with the gravel content, slope gradient, and soil thickness, whereas those in the slight, moderate, and severe rocky desertification areas were primarily associated with the land use, gravel content, and slope gradient. The results suggest that the land use and human settlement were important factors determining the rocky desertification. The rocky desertification in the study area has improved during the period from 1978 to 2015. The main contribution to this improvement originated from the change in land use patterns. Therefore, reasonable management of land use and human settlement distribution can effectively reduce the rocky desertification in a karst area.

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Effect of land cover change on total SOC and soil PhytOC accumulation in the karst subtropical forest ecosystem, SW China

Sheng

Yuan

et al. 2021

J Soils Sediments

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Soil organic carbon change relating to the prevention and control of rocky desertification in Guizhou Province, SW China

Cited by 11 publications

References 0 publications

The Spatial Distribution Characteristics of Soil Organic Carbon and Its Effects on Topsoil under Different Karst Landforms

The Spatial Distribution Characteristics of Soil Organic Carbon and Its Effects on Topsoil under Different Karst Landforms

Factors influencing the evolution of human‐driven rocky desertification in karst areas

Effect of land cover change on total SOC and soil PhytOC accumulation in the karst subtropical forest ecosystem, SW China

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