Evaluation of soil fertility in the succession of karst rocky desertification using principal component analysis

Xie, Lianwu; Zhong, Jie; Chen, F. F.; Cao, Fuxiang; Li, J. J.; Wu, Lichao

doi:10.5194/se-6-515-2015

Cited by 98 publications

(56 citation statements)

References 59 publications

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“…Xie et al (2015) highlighted that the degradation trend of soil fertility was almost parallel to the aggravation of karst rocky desertification. Thus, how to conserve and restore the degraded karst areas is promoted by Chinese central and local governments (Hu et al, 2008;Zhao et al, 2014).…”

Section: Implications For Future Land-use Managementmentioning

confidence: 99%

“…We hypothesized that the ecological resettlement program may deplete SOM stocks, and thus cause soil degradation. Recently, some researchers have paid more attention about the effect of land use change on the soil physicochemical properties and soil quality in this karst region (Fu et al, 2015;Hu et al, 2014;Xie et al, 2015;Xu et al, 2008). However, studies on soil C dynamics were mainly focused on the surface layers (e.g., ≤ 30 cm), and the FD method is utilized to assess SOC stocks Fu et al, 2015;Liu et al, 2015b;Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Combined deep sampling and mass-based approaches to assess soil carbon and nitrogen losses due to land-use changes in karst area of southwestern China

Wang

et al. 2016

Solid Earth

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Abstract. The conversion of natural vegetation to humanmanaged ecosystems, especially the agricultural systems, may decrease soil organic carbon (SOC) and total nitrogen (TN) stocks. The objective of present study was to assess SOC and TN stocks losses by combining deep sampling with mass-based calculations upon land-use changes in a typical karst area of southwestern China. We quantified the changes from native forest to grassland, secondary shrub, eucalyptus plantation, sugarcane and corn fields (both defined as croplands), on the SOC and TN stocks down to 100 cm depth using fixed-depth (FD) and equivalent soil mass (ESM) approaches. The results showed that converting forest to cropland and other types significantly led to SOC and TN losses, but the extent depended on both sampling depths and calculation methods selected (i.e., FD or ESM). On average, the shifting from native forest to cropland led to SOC losses by 19.1, 25.1, 30.6, 36.8 and 37.9 % for the soil depths of 0-10, 0-20, 0-40, 0-60 and 0-100 cm, respectively, which highlighted that shallow sampling underestimated SOC losses. Moreover, the FD method underestimated SOC and TN losses for the upper 40 cm layer, but overestimated the losses in the deeper layers. We suggest that the ESM together with deep sampling should be encouraged to detect the differences in SOC stocks. In conclusion, the conversion of forest to managed systems, in particular croplands significantly decreased in SOC and TN stocks, although the effect magnitude to some extent depended on sampling depth and calculation approach selected.

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Section: Implications For Future Land-use Managementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combined deep sampling and mass-based approaches to assess soil carbon and nitrogen losses due to land-use changes in karst area of southwestern China

Wang

et al. 2016

Solid Earth

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“…Research contributions to biophysical degradation assessments (e.g. Cerdà and Lavee, 1999;Cerdà, 2002;Xie et al, 2015;Vieira et al, 2015) and monitoring of desertification processes (e.g. Wang et al, 2013;Bai et al, 2013;Xu and Zhang, 2014) date back to recent decades.…”

Section: Desertification As a Complex Social-ecological Problemmentioning

confidence: 99%

Zero net livelihood degradation – the quest for a multidimensional protocol to combat desertification

Easdale¹

2016

SOIL

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Abstract. The concept of Zero Net Land Degradation was recently proposed as the basis for a future protocol for the United Nations Convention to Combat Desertification to reduce global dryland degradation. It aims at reducing the rate of land degradation and increasing the rate of restoration of already degraded land. Whereas there is recognition of the socio-economic contexts that underlie degradation processes, there is a narrow focus on land and soil as the end core that needs to be protected. In particular, there is an essential human dimension to the sustainability of drylands that should be adequately tackled. In order to provide a wider perspective of the zero net degradation in drylands, I suggest considering the different livelihoods of rural households as a framework that encompasses the multidimensional perspective of desertification as a complex social-ecological problem. The scientific community must develop and apply the zero net livelihood degradation as an enhanced protocol to combat desertification that should foster sustainable livelihood outcomes rather than only sustainable land practices or soil management.

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“…At present, the assessment of rocky desertification control and restoration has focused on the economic benefits of governance models and technologies, as well as changes in soil erosion and the physicochemical properties of the soil (Tang et al, 2013;Xie et al, 2015), overlooking an assessment of governance efficiency. Moreover, there has been considerable arbitrariness in establishing evaluation systems and applying evaluation methods, which may consequently have led to the great range of evaluation results in the same area .…”

Section: The Challenges That Are Confronted With In Rocky Desertificamentioning

confidence: 99%

The challenge and future of rocky desertification control in karst areas in southwest China

et al. 2016

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Abstract. Karst rocky desertification occurs after vegetation deteriorates as a result of intensive land use, which leads to severe water loss and soil erosion and exposes basement rocks, creating a rocky landscape. Karst rocky desertification is found in humid areas in southwest China, the region most seriously affected by rocky desertification in the world. In order to promote ecological restoration and help peasants out of poverty, the Chinese government carried out the first phase of a rocky desertification control project from 2006 to 2015, which initially contained the expansion of rocky desertification. Currently, the Chinese government is prepared to implement the second phase of the rocky desertification control project, and therefore it is essential to summarise the lessons learned over the last 10 years of the first phase. In this paper, we analyse the driving social and economic factors behind rocky desertification, summarise the scientific research on rocky desertification in the region, and finally identify the main problems facing rocky desertification control. In addition, we put forward several policy suggestions that take into account the perspective of local peasants, scientific research, and China's economic development and urbanisation process. These suggestions include promoting the non-agriculturalization of household livelihoods, improving ecological compensation, strengthening the evaluation of rocky desertification control and dynamic monitoring, and strengthening research on key ecological function recovery technologies and supporting technologies.

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Evaluation of soil fertility in the succession of karst rocky desertification using principal component analysis

Cited by 98 publications

References 59 publications

Combined deep sampling and mass-based approaches to assess soil carbon and nitrogen losses due to land-use changes in karst area of southwestern China

Combined deep sampling and mass-based approaches to assess soil carbon and nitrogen losses due to land-use changes in karst area of southwestern China

Zero net livelihood degradation – the quest for a multidimensional protocol to combat desertification

The challenge and future of rocky desertification control in karst areas in southwest China

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