Carbohydrates in hot water extracts of soil aggregates as influenced by long-term management

Debosz, Kasia; Vognsen, Lene; Labouriau, Rodrigo

doi:10.1081/css-120002768

Cited by 31 publications

(9 citation statements)

References 25 publications

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“…The differences between the soils when dry seem to be related to differences in concentration of dispersible clay, whereas the differences when wet are related to differences in the amount of organic binding and bonding material. Micro-and macroaggregates have higher carbohydrate levels in manured soils than in those receiving chemical fertilizers (Debosz et al, 2002a). Increased ionic concentration can be a concern in manured soil, because of increase in susceptibility to dispersion and decrease in aggregate stability.…”

Section: Manuringmentioning

confidence: 99%

Soil structure and management: a review

2005

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Section: Manuringmentioning

confidence: 99%

Soil structure and management: a review

2005

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“…Monteith et al (2007) supposed that the content of DOC could increase in soil solution with a warmer climate, changes in the amount of precipitation or decline in atmospheric deposition. Debosz et al (2002) found a significantly lower content of DOC in unfertilized soils compared to fertilized arable soils. For labile carbon estimation, the use of microbial biomass carbon was recommended by Degens and Sparling (1996), while Janzen et al (1992) suggested using light-fraction organic carbon.…”

mentioning

confidence: 79%

Effect of organic fertilizers on soil organic carbon and risk trace elements content in soil under permanent grassland

Karabcová¹,

Pospíšilová²,

Fiala³

et al. 2015

Soil & Water Res.

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Karabcová H., Pospíšilová L., Fiala K., Škarpa P., Bjelková M. (2015): Effect of organic fertilizers on soil organic carbon and risk trace elements content in soil under permanent grassland. Soil & Water Res., 10: 228-235.The effect of different kinds of organic matter inputs on elemental composition, content, and quality of humic substances was studied on permanent grassland during 2008-2013. The experiment included two organic fertilizer types -compost and slurry, both with the range of stocking rates 0.9, 1.4, and 2.0 livestock units (LU)/ha (corresponding to 54, 84, and 120 kg N/ha, respectively), and control without any fertilizer. The soil was sandy-loam, of Cambisol type, with semi natural permanent grassland. Labile forms and total contents of selected trace elements (Co, Cu, Zn, Cd) and macroelements (Ca, Mg, K, P, and N) were measured. Soil organic matter parameters such as total organic carbon (C ox ), humic substances (HS), humic acid (HA), fluvic acid (FA), and labile carbon forms (hot-water extractable carbon (C hws ), cold water extractable carbon (C cws )) were determined. Results showed that the greatest content of P, Ca, Mg, and N in the soil was detected by the CO 2.0 treatment. Furthermore, the positive effect of compost on C ox , C hws , HA, FA, HS, N and macronutrients was observed. The elemental analysis of humic acids showed lower carbon content and higher oxygen content in HA molecule, which indicated young humic acids, with a lower condensation degree. The content and quality of humic substances strongly influenced the total and labile trace elements content in the soil. Additionally, hot water soluble carbon significantly correlated with plant available forms of Zn, Cu, and Cd.

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“…As rainfall continues the final infiltration rate is controlled by dispersion processes that depend on rainfall temperature, i.e. the final infiltration rates decrease with increasing temperature, probably due to an increase in thermal motion (Constantz, 1982) and in breakdown of unstable organic matter (Cheshire, 1979;Lavee et al 1991;Debosz et al, 2002). Previous studies (Constantz, 1982;Hopmans & Dane, 1986;Levy et al, 1989) showed increasing in the hydraulic conductivity in hot water; thus, it is expected that runoff will decrease.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%