Soil Organic Carbon Content and Distribution in a Small Landscape of Dongguan, South China

Su, Zhiyao; Xiong, Yongqiang; Zhang, Jianyun; YongChang, Ye; Ye, Mai

doi:10.1016/s1002-0160(06)60020-9

Cited by 47 publications

(28 citation statements)

References 11 publications

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“…The global effort towards finding sustainable solutions to the greenhouse effect has identified the potential of soils as a carbon sink. However, for an accurate and reliable large-scale determination of soil organic carbon stock, density depends on soil organic carbon density determination at local or small-scale level (Su et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Soil carbon and nitrogen losses following deforestation in Ethiopia

Berihu

Girmay

Sebhatleab

et al. 2016

Agron. Sustain. Dev.

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Ethiopia faces high risk of soil carbon depletion for nearly half of its total land mass largely due to forest clearing and continuous cultivation. Conversion of natural ecosystems to cultivated agriculture resulted in losses of between 20 and 50% of the soil C stocks in the first meter of the soil depth. Dry Afromontane forests of northern Ethiopia have faced vast exploitation, and almost all these forests have been converted to agricultural lands affecting the functionality and stability of agroecosystem. Here, we studied the effect of land use-land cover changes on soil organic C, total N, and soil C sequestration. Specifically, (a) we characterized major soils of the Desa'a Dry Afromontane forest, northern Ethiopia, and (b) we analyzed the organic C and total N contents of soils with varying land use-land cover types of the Desa'a Dry Afromontane forest. Results show that soil organic C (1.9%) and total N (0.3%) were higher for the middle landscape position than that observed for the upper and lower landscape positions. Soil organic C that ranged from 1.2 in farmland to 2.3% in dense forest also varied with land use-land cover types. Concentration of soil organic C was different among dense forest (2.3%), open forest (1.7%), grazing land (1.6%), and farmland (1.2%). Due to the effect of land use-land cover types, soil total N varied from 0.2% in the farmland to 0.3% in the dense forest. The soil organic C and total nitrogen of the top and lower layer soils were 2.0 and 1.5 and 0.2 and 0.3%, respectively. The soil organic C sequestration for dense forest was significantly higher (48.5 t ha ) than the lower soil layer. Thus, the top soil layers of dense forest at the middle landscape positions stored significant amount of soil organic carbon.

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Section: Resultsmentioning

confidence: 99%

Soil carbon and nitrogen losses following deforestation in Ethiopia

Berihu

Girmay

Sebhatleab

et al. 2016

Agron. Sustain. Dev.

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“…The increase in carboncontaining greenhouse gases is presumed to be the basis of current and future climate change (Hansen et al, 2000;Levitus et al, 2001;Schimel et al, 2000;Su et al, 2006). Soil organic carbon (SOC) stock is the largest pool in the terrestrial ecosystem, with a storage of approx.…”

Section: Introductionmentioning

confidence: 99%

Soil organic carbon storage changes in coastal wetlands of the modern Yellow River Delta from 2000 to 2009

Wang

et al. 2012

Biogeosciences

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Abstract. Soil carbon sequestration plays an essential role in mitigating atmospheric CO 2 increases and the subsequently global greenhouse effect. The storages and dynamics of soil organic carbon (SOC) of 0-30 cm soil depth in different landscape types including beaches, reservoir and pond, reed wetland, forest wetland, bush wetland, farmland, building land, bare land (severe saline land) and salt field in the modern Yellow River Delta (YRD) were studied based on the data of the regional survey and laboratory analysis. The landscape types were classified by the interpretation of remote sensing images of 2000 and 2009, which were calibrated by field survey results. The results revealed an increase of 10.59 km 2 in the modem YRD area from 2000 to 2009. The SOC density varied ranging from 0.73 kg m −2 to 4.25 kg m −2 at depth of 0-30 cm. There were approx. 3.559 × 10 6 t and 3.545 × 10 6 t SOC stored in the YRD in 2000 and 2009, respectively. The SOC storages changed greatly in beaches, bush wetland, farm land and salt field which were affected dominantly by anthropogenic activities. The area of the YRD increased greatly within 10 years, however, the small increase of SOC storage in the region was observed due to landscape changes, indicating that the modern YRD was a potential carbon sink and anthropogenic activity was a key factor for SOC change.

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“…For example, in arid and semi-arid regions of the world, the shift from cropland to grassland and then to shrubland has increased (Chen et al, 2006). Clearly, in order to achieve sustainable agricultural development and to alleviate the threats posed by land use changes that could exacerbate environmental problems and endanger human welfare, it is necessary to study the spatial variability of STN and STP under different land use types (Liu et al, 2006;Su et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the studies have revealed that the spatial variability of soil properties across the landscape of an ecosystem may be controlled by the variability in land use (Tan and Lal, 2005), topography (Wang et al, 2002;Su et al, 2006), vegetation types (Xu and Xu, 2003), cultivation (Wiliams et al, 2005), and parent material (Liu et al, 2006). Where the effect of land use type on spatial variation patterns is concerned, efforts have been made to study the spatial variation characteristics of STN and STP under a single land use type only, e.g., grassland (Gallardo and Paramá, 2007;Shorten and Pleasants, 2007), cropland (Liu et al, 2006), and shrubland (Monokrousos et al, 2004).…”

Section: Introductionmentioning

confidence: 99%