Influence of soil texture and cultivation on carbon and nitrogen levels in soils of the eastern Indo-Gangetic Plains

Gami, Sanjay K.; Lauren, J. G.; Duxbury, J. M.

doi:10.1016/j.geoderma.2009.08.003

Cited by 47 publications

(19 citation statements)

References 35 publications

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“…The soil C org content tends to decrease with soil depth and ageing in seagrass ecosystems (e.g., Serrano et al, 2012), thereby the persistence of discrete organic detritus within upper soil horizons could lead to organic matter concentrations above those levels explained by the association with clay and silt particles, as previously demonstrated for terrestrial soils (Mayer and Xing, 2001;Gami et al, 2009). The organic matter preserved in most marine sediments is intimately associated with mineral surfaces (i.e., selective preservation by sorption of organic matter into minerals; Keil et al, 1994) and therefore the correlation between soil C org and mud contents in seagrass meadows could vary as a function of soil depth and ageing.…”

Section: Discussionmentioning

confidence: 66%

Can mud (silt and clay) concentration be used to predict soil organic carbon content within seagrass ecosystems?

et al. 2016

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Abstract. The emerging field of blue carbon science is seeking cost-effective ways to estimate the organic carbon content of soils that are bound by coastal vegetated ecosystems. Organic carbon (C org ) content in terrestrial soils and marine sediments has been correlated with mud content (i.e., silt and clay, particle sizes < 63 µm), however, empirical tests of this theory are lacking for coastal vegetated ecosystems. Here, we compiled data (n = 1345) on the relationship between C org and mud contents in seagrass ecosystems (79 cores) and adjacent bare sediments (21 cores) to address whether mud can be used to predict soil C org content. We also combined these data with the δ 13 C signatures of the soil C org to understand the sources of C org stores. The results showed that mud is positively correlated with soil C org content only when the contribution of seagrass-derived C org to the sedimentary C org pool is relatively low, such as in small and fast-growing meadows of the genera Zostera, Halodule and Halophila, and in bare sediments adjacent to seagrass ecosystems. In large and long-living seagrass meadows of the genera Posidonia and Amphibolis there was a lack of, or poor relationship between mud and soil C org content, related to a higher contribution of seagrass-derived C org to the sedimentary C org pool in these meadows. The relatively high soil C org contents with relatively low mud contents (e.g., mud-C org saturation) in bare sediments and Zostera, Halodule and Halophila meadows was related to significant allochthonous inputs of terrestrial organic matter, while higher contribution of seagrass detritus in Amphibolis and Posidonia meadows disrupted the correlation expected between soil C org and mud contents. This study shows that mud is not a universal proxy for blue carbon content in seagrass ecosystems, and therefore should not be applied generally across all seagrass habitats. Mud content can only be used as a proxy to estimate soil C org content for scaling up purposes when opportunistic and/or low biomass seagrass species (i.e., Zostera, Halodule and Halophila) are present (explaining 34 to 91 % of variPublished by Copernicus Publications on behalf of the European Geosciences Union. 4916O. Serrano et al.: Mud content as blue carbon proxy ability), and in bare sediments (explaining 78 % of the variability). The results obtained could enable robust scaling up exercises at a low cost as part of blue carbon stock assessments.

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Section: Discussionmentioning

confidence: 66%

Can mud (silt and clay) concentration be used to predict soil organic carbon content within seagrass ecosystems?

et al. 2016

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“…Shrubs have more tap roots and less fibrous roots, whereas herbs have more shallow fibrous roots. The SOM in woodland is mostly derived from lignified material, which is of low litter quality and has a high C:N ratio (Gami et al, 2009). Lignified litter is incorporated into the soil more slowly than herbaceous litter in the desert and woodland (Post and Kwon, 2000).…”

Section: Influence Of Vegetationmentioning

confidence: 99%

“…Anthropogenic activities have been shown to have profound impacts on soil C and TN status in recent decades . As the repository for approximately 60% of the global terrestrial C pool, soil organic matter (SOM) is sensitive to agricultural management such as tillage (Dikgwatlhe et al, 2014;Urioste et al, 2006), fertilization (Su et al, 2006;Yang et al, 2007), land use change (Gami et al, 2009;Post and Kwon, 2000;Wei et al, 2014aWei et al, , 2014b, grazing (Pringle et al, 2014;Silveira et al, 2013) and afforestation and deforestation Zeng et al, 2014). Contradictory results on the impacts of afforestation and land management change on soil C and TN sequestration have been reported Parras-Alcántara et al, 2014;Perez-Quezada et al, 2011;Zeng et al, 2014) due to the dependence on tree types, stand ages, soil properties and depth and previous land uses (Côté et al, 2000;Wei et al, 2012;Zeng et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Multi-scale variability of soil carbon and nitrogen in the middle reaches of the Heihe River basin, northwestern China

Gao

Lü

et al. 2016

CATENA

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“…In some studies, the effects of application of organic sources on soil physical, chemical, and biological properties (Adesodun and Odejimi, 2010;G³¹b et al, 2009) and CO 2 emissions from soils (Fernandez et al, 2010) have been investigated. SOC sequestration is mainly influenced by such key factors as the amounts of C input (Borzecka-Walker et al, 2008), plant residue management (Thelen et al, 2010), soil depth (BlancoConquie and Lal, 2007), and soil texture (Gami et al, 2009). In agro-ecosystems, various organic matter management practices can have different impacts on SOC sequestration.…”

Section: Introductionmentioning

confidence: 99%

Sequestration of Organic Carbon Influenced by the Application of Straw Residue and Farmyard Manure in Two Different Soils

Mahmoodabadi¹,

Heydarpour²

2014

International Agrophysics

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Soil organic carbon is one of the most important soil components, which acts as a sink for atmospheric CO2. This study focuses on the effect of different methods of organic matter application on the soil organic carbon sequestration in a 4-month experiment under controlled greenhouse conditions. Three rates of straw residue and farmyard manure were added to uncultivated and cropland soils. Two treatments of straw residue and farmyard manure incorporation were used into: a soil surface layer and 0-20 cm soil depth. The result showed that the application of organic matter, especially the farmyard manure incorporation led to a significant increase in the final soil organic carbon content. Higher amounts of soil organic carbon were stored in the cropland soil than in the uncultivated soil. On average, the soil surface layer treatment caused a higher sequestration of soil organic carbon compared to the whole soil depth treatment. If higher rates of organic matter were added to the soils, lower carbon sequestration was observed and vice versa. The result indicated that the carbon sequestration ranged farmyardmanure > strawresidue and cropland soil > uncultivated soil. The findings of this research revealed the necessity of paying more attention to the role of organic residue management in carbon sequestration and prevention of increasing global warming.

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Influence of soil texture and cultivation on carbon and nitrogen levels in soils of the eastern Indo-Gangetic Plains

Cited by 47 publications

References 35 publications

Can mud (silt and clay) concentration be used to predict soil organic carbon content within seagrass ecosystems?

Can mud (silt and clay) concentration be used to predict soil organic carbon content within seagrass ecosystems?

Multi-scale variability of soil carbon and nitrogen in the middle reaches of the Heihe River basin, northwestern China

Sequestration of Organic Carbon Influenced by the Application of Straw Residue and Farmyard Manure in Two Different Soils

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