Effects of Land Use and Topographic Position on Soil Organic Carbon and Total Nitrogen Stocks in Different Agro-Ecosystems of the Upper Blue Nile Basin

Abebe, Getu; Tsunekawa, Atsushi; Haregeweyn, Nigussie; Taniguchi, Tadatsugu; Wondie, Menale; Adgo, Enyew; Masunaga, Tsugiyuki; Tsubo, Mitsuru; Ebabu, Kindiye; Berihun, Mulatu Liyew; Tassew, Asaminew

doi:10.3390/su12062425

Cited by 47 publications

(39 citation statements)

References 70 publications

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“…In the examination by Fang et al [64], SOC in forest land increased with altitude and levels were significantly different at 0-200 and 400-800 m in the 10-30 cm soil layer. Similar results were obtained by Abebe et al [65], where SOC stock in bushland was the highest (166.22 Mg ha −1 ) in the upper position.…”

Section: Effect Of Topographic Position and Soil Depth On Soc Contentsupporting

confidence: 90%

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Topographic Position, Land Use and Soil Management Effects on Soil Organic Carbon (Vineyard Region of Niš, Serbia)

et al. 2021

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Spatial distribution of soil organic carbon (SOC) is the result of a combination of various factors related to both the natural environment and anthropogenic activities. The aim of this study was to examine (i) the state of SOC in topsoil and subsoil of vineyards compared to the nearest forest, (ii) the influence of soil management on SOC, (iii) the variation in SOC content with topographic position, (iv) the intensity of soil erosion in order to estimate the leaching of SOC from upper to lower topographic positions, and (v) the significance of SOC for the reduction of soil’s susceptibility to compaction. The study area was the vineyard region of Niš, which represents a medium-sized vineyard region in Serbia. About 32% of the total land area is affected, to some degree, by soil erosion. However, according to the mean annual soil loss rate, the total area is classified as having tolerable erosion risk. Land use was shown to be an important factor that controls SOC content. The vineyards contained less SOC than forest land. The SOC content was affected by topographic position. The interactive effect of topographic position and land use on SOC was significant. The SOC of forest land was significantly higher at the upper position than at the middle and lower positions. Spatial distribution of organic carbon in vineyards was not influenced by altitude, but occurred as a consequence of different soil management practices. The deep tillage at 60–80 cm, along with application of organic amendments, showed the potential to preserve SOC in the subsoil and prevent carbon loss from the surface layer. Penetrometric resistance values indicated optimum soil compaction in the surface layer of the soil, while low permeability was observed in deeper layers. Increases in SOC content reduce soil compaction and thus the risk of erosion and landslides. Knowledge of soil carbon distribution as a function of topographic position, land use and soil management is important for sustainable production and climate change mitigation.

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Section: Effect Of Topographic Position and Soil Depth On Soc Contentsupporting

confidence: 90%

“…In contrast, numerous studies have confirmed carbon leaching through erosion related to topography [65][66][67][68]. With increasing slope, infiltration decreases because the increasing slope area and the velocity of the water flow lead to increasing runoff.…”

Section: Effect Of Topographic Position and Soil Depth On Soc Contentmentioning

confidence: 99%

Topographic Position, Land Use and Soil Management Effects on Soil Organic Carbon (Vineyard Region of Niš, Serbia)

et al. 2021

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“…Compared to the use of DEM in the above-mentioned studies, the effects of the terrain features on the spatial patterns of grassland soil respiration were scarcely studied. Cultivated areas, grazed or restored grassland vegetation types with different aspects and slope positions have mostly been analysed for soil organic carbon, total nitrogen or other nutrient distribution/accumulation/erosion as well as patterns of above and belowground biomass [36][37][38][39][40] . These studies provided evidence for the effects of these terrain features on the differences in the spatial patterns of the soil nutrients or plant biomass, both influencing R s spatio-temporally.…”

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confidence: 99%

Two potential equilibrium states in long-term soil respiration activity of dry grasslands are maintained by local topographic features

Fóti

Balogh

Gecse

et al. 2020

Sci Rep

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Soil respiration of grasslands is spatio-temporally variable reflecting the changing biological activities of the soil. in our study we analysed how the long-term soil respiration activities of dry grasslands would perform in terms of resistance and resilience. We also investigated how terrain features are responsible for response stability. We conducted a 7-year-long spatial study in a Hungarian dry grassland, measuring soil respiration (R s), soil temperature (T s) and soil water content (SWC) along 15 measuring campaigns in 80 × 60 m grids and soil organic carbon content in 6 of the occasions. two proxy variables were introduced to grasp the overall R s activity, as well as its temporal stability: average rankR s , the temporal average R s rank of a measuring position from the campaigns revealed the persistent spatial pattern of R s , while rangeR s , the range of ranks of the positions from the campaigns described the amplitude of the R s response in time, referring to the response stability in terms of resistance or resilience. We formulated a hypothetic concept of a two-state equilibrium to describe the performance of the long-term R s activity: R s activity with smaller rangeR s , that is both the lower elevation positions with larger rankR s ("state I") and the higher elevation positions with smaller rankR s ("state II") correspond to an equilibrium state with several terrain attributes being responsible for the equilibrium responses. Majority of the measuring positions was belonging to none of these equilibrium states. these positions showed higher rangeR s for medium rankR s , suggesting resilience (not resistance) as a major strategy for this ecosystem. Grasslands exchange large quantities of greenhouse gases between the soil and the atmosphere. Uncertainties related to greenhouse gas flux estimates originate partly from the fact that these fluxes are spatio-temporally highly variable 1-5. Seasonal and diurnal fluctuations of these fluxes, e.g., soil respiration (R s) and its components are partly temperature (T s) driven 6 but temporal changes in soil moisture (SWC 7), plant biomass, photosynthetic performance 8 and litterfall also play a significant role in modifying the overall picture. Also, R s and its main abiotic drivers, T s and SWC, show substantial horizontal heterogeneity at different spatial scales 4,9-13 , which is made even more complex by the interaction of the explanatory variables (e.g., cooling effect of soil moisture 4,11,14). These point to the relevance of spatial studies with temporal replicates 14. Although the actual value and spatial distribution of the pattern-generating factors are responsible for the observed spatial pattern of R s , the functioning of ecosystems takes place through dynamically changing, forming and transforming spatial patterns 13,15-19 , which are worth further investigations. Furthermore, the stability of ecosystem functions and the existence of persistent patterns are of high significance as these patterns are sustained by long-term climatic, surface rel...

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“…Empirically, this is true that SOC stocks generally increase as the mean annual temperature decreases (Stockmann et al, 2013). It has also been shown that less soil disturbance, greater vegetation cover, and organic input from grazing animals would improve the SOC in the highland areas (Abebe et al, 2020). The ndings show the need for climate-smart land management practices that contribute to soil organic carbon stock and at the same time reducing its emission from croplands and grasslands of the study area.…”

Section: Resultsmentioning

confidence: 67%

“…The show that soil carbon sequestration in croplands is small, which is also true in this study. Particularly in the highland areas, the SOC content in cropland was signi cantly increased from the upper to lower topographic positions (Abebe et al, 2020). This is because the upper lands are often exposed to soil erosion, serving as a source of runoff and sediment for the lower positions .…”

Section: Resultsmentioning

confidence: 99%

Land Degradation Neutrality Assessment Using Geospatial Techniques in North Wello Zone, Northern Ethiopia

Tessera

Zeleke

Mersha

2021

Preprint

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Background: Land degradation is increasingly recognized as a serious, nationwide environmental concern in Ethiopia. The key concern is the iterative relationship between land degradation, climate change and agriculture, exacerbating one another via negative and positive feedback loops. Due to the need for an efficient response to land degradation in the country, different sustainable land management practices have been implemented since the late 1980s. In Ethiopia, most of the previous researches were conducted on analyzing the determinants of decisions to implement land management practices. The objective of this study was to analyze land degradation neutrality status using remote sensing data in the study area. Results: We have studied the land degradation neutrality conditions of North Wello Zone by using indicators data, namely land cover change, land productivity dynamics and soil organic carbon stock. The areas of settlement consistently expanded at the fifth speed (2010-2018) from 1995 to 2010. Between 1995 and 2010, forestland declined by 18 percent, while it indicated an increasing trend of 26.8 percent from 2010 to 2018. The wetlands declined by 21.98 percent from 1995 to 2010; whereas zero net degradation was observed from 2010 to 2020. In addition, between 1995 and 2010, cropland and grassland showed an increasing trend but decreasing trends were detected between 2010 and 2018. Land productivity potential assessment results indicate that 52.8 percent of the total area is stable and characterized by a less stressed land productivity status. Approximately 22.7 percent of the land showed an increase in land productivity status from 2001 to 2018. The results also indicated that 19.64 percent of the land shows an early sign of decline or actual land productivity decline. 3.5 percent of land also shows a decline in productivity. The soil organic carbon is comparatively abundant in the high and midland vegetation areas but very thin in lowland areas.Conclusion: Most of the highland and midland parts of the study areas are stable and increasing land productivity condition with high biomass and soil organic content. However, most lowland areas showed a decline land productivity condition.

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Effects of Land Use and Topographic Position on Soil Organic Carbon and Total Nitrogen Stocks in Different Agro-Ecosystems of the Upper Blue Nile Basin

Cited by 47 publications

References 70 publications

Topographic Position, Land Use and Soil Management Effects on Soil Organic Carbon (Vineyard Region of Niš, Serbia)

Topographic Position, Land Use and Soil Management Effects on Soil Organic Carbon (Vineyard Region of Niš, Serbia)

Two potential equilibrium states in long-term soil respiration activity of dry grasslands are maintained by local topographic features

Land Degradation Neutrality Assessment Using Geospatial Techniques in North Wello Zone, Northern Ethiopia

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