Management-induced change in labile soil organic matter under continuous corn in eastern Canadian soils

Liang, Biqing; MacKenzie, A. F.; Schnitzer, M.; Monreal, Carlos M.; Voroney, Paul; Beyaert, Ronald P.

doi:10.1007/s003740050348

Cited by 133 publications

(77 citation statements)

References 20 publications

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“…These include cropping frequency, tillage intensity and soil texture. While reduced tillage has been shown to sequester more SOC compared to conventional tillage systems in the Canadian prairie soils (Liang et al 1999), its influence on LFOC is less certain. Larney et al (1997) reported that after 16 yr of a spring wheat-fallow rotation, no-till management significantly increased SOC by 8% compared with conventional tillage, but LFOC increased by 15%.…”

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confidence: 97%

“…Campbell et al (1996a) showed greater increase in SOC for fine-textured than coarse-textured soils as a result of adopting no-tillage management. Liang et al (1998) reported that LFOC/SOC was greater in coarse-textured soils than in fine-textured soils.…”

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confidence: 98%

“…This pool of soil organic matter is several times greater than that of soil microbial biomass (Liang et al 1998), and is of importance in the turnover of organic matter in agricultural soils because it serves as a readily mineralizable substrate for soil microorganisms (Gregorich et al 1994).…”

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Effect of tillage and crop rotations on the light fraction organic carbon and carbon mineralization in Chernozemic soils of Saskatchewan

Liang¹,

McConkey²,

Schoenau³

et al. 2003

Can. J. Soil. Sci.

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H. 2003. Effect of tillage and crop rotations on the light fraction organic carbon and carbon mineralization in Chernozemic soils of Saskatchewan. Can J. Soil Sci. 83: 65-72. Light fraction of soil organic C (LFOC) represents a major portion of labile soil organic C (SOC) and is a key attribute of soil quality. Soil respiration (C min ) is an important index depicting the potential activity of the labile SOC. Six field experiments, varying in duration (8 to 25 yr), in location (Brown, Dark Brown and Black Chernozemic soil zones of Saskatchewan) and soil texture, were conducted to evaluate the impact of tillage and crop rotations on crop production and soil quality. We sampled the 0-7.5-cm depth of soil in these experiments to determine the treatment effects on LFOC, the proportion of LFOC in the SOC (LFOC/SOC) and C min . Increasing the frequency of summer fallow in cropping systems decreased the LFOC in all soil zones; it also decreased the proportion of LFOC in SOC and C min . Tillage had little impact on LFOC in the Brown and Dark Brown Chernozemic soil zones, although it significantly decreased LFOC in the Black Chernozemic soil zone. Thus, crop rotation had a greater impact on LFOC than tillage. Tillage did not influence C min in any soil zone. Because adoption of no-till management increased SOC in all soil zones, we concluded that LFOC was not a sensitive indicator of the impact of tillage on this soil quality attribute for these Chernozemic soils in Saskatchewan. We also found that LFOC/SOC is directly proportional to sand content. This relationship may assist us in partitioning SOC pools with differing turnover times when modeling SOC dynamics.Key words: Soil organic C, light fraction organic C, tillage, crop rotations, texture, mineralizable C Liang, B. C., McConkey, B. G., Schoenau, J., Curtin, D., Campbell, C. A., Moulin, A. P., Lafond, G. P., Brandt, S. A. et Wang, H. 2003. Incidence du travail du sol et de l'assolement sur la fraction légère du carbone organique et sur la minéralisation du carbone dans les sols tchernozémiques de la Saskatchewan. Can. J. Soil Sci. 83: 65-72. La fraction légère du C organique du sol (FLCO) constitue une part importante du C organique du sol (COS) labile et elle figure parmi les principaux paramètres qualitatifs du sol. La respiration (C min ) est un indice important caractérisant l'activité potentielle du COS labile. Les auteurs ont entrepris six expériences d'une durée variable (de 8 à 25 ans), à divers endroits (zones de sols bruns, de sols brun foncé et de sols noirs tchernozémiques de la Saskatchewan) et sur des sols de texture différente, afin d'évaluer l'incidence du travail du sol et de l'assolement sur la production végétale et la qualité du sol. Ils ont prélevé des échantillons de sol à une profondeur de 0 à 7,5 cm et déterminé l'effet des traitements sur la FLCO, la proportion de FLCO dans le COS (FLCO/COS) et la C min . Des jachères d'été plus fréquentes réduisent la FLCO dans toutes les zones de sols; elles diminuent aussi le rapport FLCO/COS et la C m...

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confidence: 98%

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Effect of tillage and crop rotations on the light fraction organic carbon and carbon mineralization in Chernozemic soils of Saskatchewan

Liang¹,

McConkey²,

Schoenau³

et al. 2003

Can. J. Soil. Sci.

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“…The concentration of EOC was determined by the method described in Liang et al (1998). Briefly, soil EOC was extracted from 10 g moist soil with an addition of 20 ml distilled water.…”

Section: Soil Property Measurementmentioning

confidence: 99%

Effect of thinning-induced gap size on soil CO2 efflux in a reforested spruce forest in the eastern Tibetan Plateau

Pang

Bao

et al. 2016

Agricultural and Forest Meteorology

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“…It has been pointed out that land use changes can affect soil microbial activity and the chemical nature of SOC through changing the rates of aromatization or humification (Fontaine et al 2007). A higher ETC may be indicative of higher humification rate and microbial activity in forest soils (Liang et al 1998). The ability of soil DOM to shuttle electrons from donors to acceptors was mainly due to the electroactive moieties (Scott et al 1998), which are ubiquitous in living cells, extracellular material, humic substances, and dissolved organic matter (Cory and Mcknight 2005).…”

Section: Etc Of Soil Dommentioning

confidence: 99%

Electron transfer capacity of soil dissolved organic matter and its potential impact on soil respiration

et al. 2013

J Soils Sediments

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Management-induced change in labile soil organic matter under continuous corn in eastern Canadian soils

Cited by 133 publications

References 20 publications

Effect of tillage and crop rotations on the light fraction organic carbon and carbon mineralization in Chernozemic soils of Saskatchewan

Effect of tillage and crop rotations on the light fraction organic carbon and carbon mineralization in Chernozemic soils of Saskatchewan

Effect of thinning-induced gap size on soil CO2 efflux in a reforested spruce forest in the eastern Tibetan Plateau

Electron transfer capacity of soil dissolved organic matter and its potential impact on soil respiration

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