Soil organic carbon in density fractions of tropical soils under forest – pasture – secondary forest land use changes

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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Effects of land use changes and conservation measures on land degradation under a Mediterranean climate

Solid Earth Discussions ◽

10.5194/sed-7-115-2015 ◽

2015 ◽

Vol 7 (1) ◽

pp. 115-145 ◽

Cited By ~ 4

Author(s):

Y. Mohawesh ◽

A. Taimeh ◽

F. Ziadat

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Land Degradation ◽

Soil Conservation ◽

Land Use Changes ◽

Conservation Measures ◽

Stone Walls ◽

Effects Of Land Use ◽

Soil Conservation Measures

Abstract. Land degradation resulting from improper land use and management is a major cause of declined productivity in the arid environment. The objectives of this study were to examine the effects of a sequence of land use changes, soil conservation measures, and the time since their implementation on the degradation of selected soil properties. The climate for the selected 105 km2 watershed varies from semi-arid sub-tropical to Mediterranean sub-humid. Land use changes were detected using aerial photographs acquired in 1953, 1978, and 2008. A total of 218 samples were collected from 40 sites in three different rainfall zones to represent different land use changes and different lengths of time since the construction of stone walls. Analyses of variance were used to test the differences between the sequences of land use changes (interchangeable sequences of forest, orchards, field crops, and range), the time since the implementation of soil conservation measures, and rainfall on the thickness of the A-horizon, soil organic carbon content, and texture. Soil organic carbon reacts actively with different combinations and sequences of land use changes. The time since stone walls were constructed showed significant impacts on soil organic carbon and the thickness of the surface horizon. The effects of changing the land use and whether the changes were associated with the construction of stone walls, varied according to the annual rainfall. The results help in understanding the effects of land use changes on land degradation processes and carbon sequestration potential and in formulating sound soil conservation plans.

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Climate and land use changes effects on soil organic carbon stocks in a Mediterranean semi-natural area

The Science of The Total Environment ◽

10.1016/j.scitotenv.2016.11.111 ◽

2017 ◽

Vol 579 ◽

pp. 1249-1259 ◽

Cited By ~ 32

Author(s):

Beatriz Lozano-García ◽

Miriam Muñoz-Rojas ◽

Luis Parras-Alcántara

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Land Use Changes ◽

Carbon Stocks ◽

Natural Area ◽

Soil Organic Carbon Stocks

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Soil organic carbon dynamics: Impact of land use changes and management practices: A review

Advances in Agronomy ◽

10.1016/bs.agron.2019.02.001 ◽

2019 ◽

pp. 1-107 ◽

Cited By ~ 22

Author(s):

Thangavel Ramesh ◽

Nanthi S. Bolan ◽

Mary Beth Kirkham ◽

Hasintha Wijesekara ◽

Manjaiah Kanchikerimath ◽

...

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Management Practices ◽

Land Use Changes ◽

Carbon Dynamics ◽

Soil Organic Carbon Dynamics

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A Markov Model Projection of Soil Organic Carbon Stores Following Land Use Changes

Journal of Environmental Management ◽

10.1006/jema.1995.0076 ◽

1995 ◽

Vol 45 (3) ◽

pp. 287-302 ◽

Cited By ~ 21

Author(s):

D.M. Howard ◽

P.J.A. Howard ◽

D.C. Howard

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Markov Model ◽

Land Use Changes ◽

Model Projection ◽

Carbon Stores

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Effects of land use changes and soil conservation intervention on soil properties as indicators for land degradation under a Mediterranean climate

Solid Earth ◽

10.5194/se-6-857-2015 ◽

2015 ◽

Vol 6 (3) ◽

pp. 857-868 ◽

Cited By ~ 32

Author(s):

Y. Mohawesh ◽

A. Taimeh ◽

F. Ziadat

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Properties ◽

Land Degradation ◽

Soil Conservation ◽

Land Use Changes ◽

Stone Walls ◽

Effects Of Land Use ◽

Soil Conservation Measures

Abstract. Land degradation resulting from improper land use and management is a major cause of declined productivity in the arid environment. The objectives of this study were to examine the effects of a sequence of land use changes, soil conservation measures, and the time since their implementation on the degradation of selected soil properties. The climate for the selected 105 km2 watershed varies from semi-arid sub-tropical to Mediterranean sub-humid. Land use changes were detected using aerial photographs acquired in 1953, 1978, and 2008. A total of 218 samples were collected from 40 sites in three different rainfall zones to represent different land use changes and variable lengths of time since the construction of stone walls. Analyses of variance were used to test the differences between the sequences of land use changes (interchangeable sequences of forest, orchards, field crops, and range), the time since the implementation of soil conservation measures, rainfall on the thickness of the A-horizon, soil organic carbon content, and texture. Soil organic carbon reacts actively with different combinations and sequences of land use changes. The time since stone walls were constructed showed significant impacts on soil organic carbon and the thickness of the surface horizon. The effects of changing the land use and whether the changes were associated with the construction of stone walls varied according to the annual rainfall. The changes in soil properties could be used as indicators of land degradation and to assess the impact of soil conservation programs. The results help in understanding the effects of land use changes on land degradation processes and carbon sequestration potential and in formulating sound soil conservation plans.

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Soil organic carbon assessment under different land uses in Cauvery delta zone of Tamil Nadu, India

Journal of Applied and Natural Science ◽

10.31018/jans.v12i4.2372 ◽

2020 ◽

Vol 12 (4) ◽

pp. 478-483

Author(s):

Surya Prabha A.C. ◽

Velumani R. ◽

Senthivelu M. ◽

Arulmani K. ◽

Pragadeesh S.

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Tamil Nadu ◽

Soil Samples ◽

Land Uses ◽

Forest Land ◽

Size Fractions ◽

Soc Stock ◽

Cauvery Delta

Soil organic carbon (SOC) plays a vital role in soil fertility and is important for its contributions to mitigation and adaptation to climate change. The present study was undertaken to estimate the SOC stock in soils under different land uses of Cauvery Delta zone of Tamil Nadu. Four different land uses were selected for the study viz, Forests, Agriculture, Agro-forestry and Plantations. Soil samples were collected from Madukkur and Kalathur soil series of Cauvery Delta zone for soil carbon analysis. The soil samples were fractionated into three aggregate size classes viz., macro-aggregates (250-2000µm), micro-aggregates (53-250 µm) and silt and clay sized fraction (<53 µm). At 0-30 cm depth, the forest land use stored the maximum SOC stock in the different size fractions viz. macro-sized fraction (73.0 Mg ha-1), a micro-sized fraction (76.0 Mg ha-1) and silt+clay sized fraction (77.0 Mg ha-1) in Madukkur series. Agriculture land use registered the lowest SOC stock. Among the different size fractions, silt+clay sized fraction (< 53 µm) retained the maximum SOC in all the land uses. In Kalathur series also, maximum soil organic carbon stock was recorded in forest land use. The data generated in the study will be beneficial to the user groups viz., farmers in identifying the most suitable land use for enhancing the storage of soil organic carbon thereby improving yields of crops and trees.

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Natural reforestation effect on soil organic carbon and СО2 flux dynamics in southern taiga ecosystems with Albeluvisols

10.5194/egusphere-egu2020-13507 ◽

2020 ◽

Author(s):

Ivan Vasenev ◽

Tatyana Komarova ◽

Solomon Melese

Keyword(s):

Land Use ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Air Temperature ◽

Natural Regeneration ◽

Land Use Changes ◽

Southern Taiga ◽

Maximum Intensity ◽

Taiga Zone ◽

Southern Taiga Zone

Introduction. Natural reforestation is the widespread trend in the modern land-use changes in the southern taiga zone at the European territory of Russia after 1990s. Its total area is more than 10 million ha. At the same time forest natural regeneration is mutual usual process in the long-term land-use changes in this part of Russia with complex history of its development during millennium. It plays crucial role in soil successions, their fertility and environmental function dynamics including bio productivity support and carbon sequestration, which is given special attention against the background of global climate change challenges in the twenty-first century. This paper presents the results of a round-the-year monitoring of soil CO2 emission in comparable sites of the fallow lands chrono sequences in conditions of a representative area of the Central Forest Reserve with background wood-sorrel spruce forests which are typical for the southern taiga zone of Central Russia.Objects and methods. The dominant soil type is sandy-loam Albeluvisols (by WRB, or Orthopodzolic soil by Russia Taxonomy, or Alfisols by Soil Taxonomy, or Podzoluvisols by FAO). The studies have been done in the representative 5 sites at different age of natural reforestation: (1) Fallow meadow grassland &#8211; &#8220;0-moment&#8221;; (2) Forest-fallow birch domination stage of 10-15 year; (3) Birch domination stage of 20-30 year with young spruce participation; (4) Birch-forest stage of 50-60 year with spruce participation; (5) Spruce-forest after fallow stage of more than 100 year with birch participation. CO2 fluxes seasonal and diurnal dynamics measuring were carried out in situ using a mobile gas analyzer Li-820 and soil exposure chambers with parallel measurements of air temperature, soil temperature and moisture. Also, biomass, soil organic carbon and bulk density were analyzed in their topsoil and subsoil horizons with C stock calculation.Results and discussion. Analysis of the successional dynamics of the topsoil organic carbon stock showed the maximum rate of their increasing in the first stages of natural reforestation by a thick undergrowth of birch (more than 30 g m-2&#8729;year-1) that agrees well with the maximum intensity of the woody biomass growth in case of dominant birch forest up to 50-60 years (more than 100 g m-2&#8729;year-1). Research revealed the maximum intensity of soil CO2 emission (up to 11-12 g C-CO2 m-2&#8729;day-1) in the meadow fallow land and its gradual decreasing in process of reforestation down to values close to background ecosystems in 4-5 g C-CO2 m-2&#8729;day-1 in the last investigated succession study with wood-sorrel spruce older than 100 years, which is in good correlation with the gradual humus accumulation in topsoil due to reduced mineralization of organic compounds from dying vegetation. The seasonal and daily dynamics of soil CO2 emissions are determined by soil temperature (KTS 0.77 - 0.99), air temperature (KTA 0.42 - 0.99), and soil moisture in spring and fall (KWS -0.55 - -0.98).Conclusions. Investigation of forest natural regeneration impacts on the level of soil organic carbon accumulation and CO2 fluxes in the representative southern taiga ecosystems is important element of their soil environmental monitoring and management.

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