Impact of tillage practices on organic carbon and nitrogen storage in cool, humid soils of eastern Canada

Angers, Denis A.; Bolinder, Martin A.; Carter, M.R.; Gregorich, E.G.; Drury, C. F.; Liang, Biqing; Voroney, R. P.; Simard, R. R.; Donald, R. G.; Beyaert, Ronald P.; Martel, Jean-Luc

doi:10.1016/s0167-1987(96)01100-2

Cited by 345 publications

(198 citation statements)

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“…Although no-till resulted in gains in OC on the most eroded sites, the OC content decreased over the 15 yr on the depositional sites. These trends are in contrast to data obtained in comparisons of OC stocks between tillage treatments on level sites on different research stations from eastern Canada (Angers et al 1997;Deen and Kataki 2003) that have shown no differences in OC stocks between conventional tillage and no-till. However, the negative correlation between change in OC and initial OC observed on the four farms in southern Ontario by VandenBygaart et al (2002) was also obtained when data from several long-term field sites in different regions of Canada were considered (VandenBygaart et al 2003).…”

contrasting

confidence: 99%

“…During collection of alkali traps, any sprouts that appeared in the cores were removed. Samples were back titrated using 0.25 M hydrochloric acid (HCl) (Anderson 1982).…”

Section: Carbon Mineralizationmentioning

confidence: 99%

“…During collection of alkali traps, any sprouts that appeared in the cores were removed. Samples were back titrated using 0.25 M hydrochloric acid (HCl) (Anderson 1982).Cumulative C mineralization was calculated by summing up CO 2 -C evolved for each sampling period. In addition, the proportion of whole soil OC mineralized over the 9-wk incubation (mineralizable C) was also determined (expressed as a percent).…”

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confidence: 99%

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Factors influencing mineralizable carbon in a landscape with variable topography

Chan¹,

Gregorich²

2007

Can. J. Soil. Sci.

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. 2007. Factors influencing mineralizable carbon in a landscape with variable topography. Can. J. Soil Sci. 87: 495-509. Management-induced erosion has substantially increased the spatial variability in soil organic carbon (OC) stocks in landscapes with variable topography, but its impact on C dynamics is not well understood. The variability in cumulative C mineralization of samples from five positions in a landscape was examined in an incubation study and the effects of water content and depth within the A horizon were assessed. Mineralization was generally at a maximum at water contents between 80 and 95% water-filled pore space. The amount of C mineralized increased with OC content, but the proportion of the mineralizable OC decreased with increasing OC content. Few significant differences in C mineralization existed between surface and subsurface layers of the A horizon. The spatial patterns in maximum C mineralization were generally indicative of the patterns obtained when mineralization was calculated using spatial patterns of actual seasonal average water contents. This suggests the spatial pattern of maximum mineralization was not strongly influenced by variable hydrologic conditions on this site and reflects the spatial patterns in annual mineralization. The proportion of OC mineralized was not related to the proportion of the OC in particulate organic carbon (POC) or in the silt + clay fractions, but was significantly negatively related to the saturation of the clay + silt fraction with C. We speculate that the decline in the proportion of mineralized OC with increasing OC content reflects an increased proportion of the capacity of the silt + clay fraction to retain and physically protect OC within microaggregates.Key words: Erosion, deposition, mineralizable organic carbon, spatial variability Chan, C., Kay, B. D. et Gregorich, E. G. 2007. Facteurs influençant la minéralisation du carbone dans un paysage à relief variable. Can. J. Soil Sci. 87: 495-509. L'érosion qui résulte de la gestion des terres a sensiblement accru la variabilité spatiale des réserves de carbone organique (CO) du sol dans les paysages à relief variable, mais on comprend mal son incidence sur la dynamique du carbone. Les auteurs ont vérifié la variabilité de la minéralisation cumulative du C dans les échantillons prélevés à cinq endroits, dans un paysage, lors d'une étude d'incubation puis ont évalué les effets de la teneur en eau et de la profondeur dans l'horizon A examiné. En général, la minéralisation atteint un maximum quand la teneur en eau correspond à 80-95 % de l'espace occupé par les pores emplis d'eau. La quantité de C minéralisé s'accroît avec la concentration de CO, mais la proportion de CO minéralisable diminue à mesure qu'augmente la concentration de CO. La minéralisation du C varie peu entre la couche superficielle et les couches inférieures de l'horizon A. Dans l'ensemble, la minéralisation maximale du C suit une tendance spatiale analogue à celle observée quand on calcule la minéralisation à partir des tendances ...

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contrasting

confidence: 99%

“…During collection of alkali traps, any sprouts that appeared in the cores were removed. Samples were back titrated using 0.25 M hydrochloric acid (HCl) (Anderson 1982).…”

Section: Carbon Mineralizationmentioning

confidence: 99%

mentioning

confidence: 99%

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Factors influencing mineralizable carbon in a landscape with variable topography

Chan¹,

Gregorich²

2007

Can. J. Soil. Sci.

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“…Apesar de a matéria orgânica do solo aumentar sob o sistema plantio direto e apresentar elevado aporte de resíduos, deve-se considerar que este aumento também depende de outros fatores, tais como: clima, principalmente temperatura, precipitação, textura e mineralogia do solo (Alvarez & Lavado, 1998). O aumento no conteúdo de C pode ser limitado em solos de textura fina e mal drenados e em locais onde baixas temperaturas dificultem a decomposição da matéria orgânica (Angers et al, 1997;Paustian et al, 1997).…”

Section: Introductionunclassified

Formas de carbono em Latossolo Vermelho Eutroférrico sob plantio direto no sistema biogeográfico do cerrado

Rosa

Olszevski

Mendonça

et al. 2003

Rev. Bras. Ciênc. Solo

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RESUMOEste trabalho teve por objetivo avaliar aspectos da física, química e da dinâmica de carbono de um Latossolo Vermelho Eutroférrico, sob diferentes condições de uso. Foram utilizados materiais de solo cultivado com plantio direto, irrigado e sequeiro, e sob floresta nativa, na região de Santa Helena de Goiás (GO). As amostras foram coletadas de camadas de 0,00-0,05, 0,05-0,10, 0,10-0,20, 0,20-0,30 e 0,30-0,40 m e separadas em agregados maiores e menores que 0,25 mm. Foram realizadas análises químicas e físicas para caracterização do solo e determinados o carbono orgânico total, o carbono mineralizável, o carbono da biomassa microbiana, o carbono solúvel em água e a matéria orgânica lábil. Os resultados, indicaram que o plantio direto não foi capaz de manter os níveis de carbono nos agregados, quando comparado ao solo sob floresta nativa; a matéria orgânica desempenhou papel relevante na formação e estabilização de agregados maiores que 0,25 mm; a porosidade, resistência ao penetrômetro e densidade do solo demonstraram que houve aumento da compactação do solo no sistema plantio direto, quando comparado ao solo sob floresta nativa, tendo a densidade se mostrado uma variável satisfatória para a avaliação de compactação no Latossolo Vermelho Eutroférrico; a matéria orgânica lábil apresentou potencial para ser utilizada em estudos de ciclagem de nutrientes e fenômenos de dispersão e floculação de argila.Termos de indexação: cerrado; plantio direto; matéria orgânica do solo.

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“…Conventional tillage increases the CO 2 in the atmosphere by promoting the loss of soil organic matter, while instead of conventional tillage, conservation tillage increases soil organic matter (SOM) with the passage of time (Dao, 1998) and available water content and soil aggregation (Pare etal.,1999) The way by which Conventional Tillage (CT) might store more carbon than No Tillage (NT) is not clear (Angers et al, 1997). Conventional tillage increases CO 2 respiration as the soil is plowed (Lupwayi et al, 1999), but it appears that due to plowing organic matter is pushed more deeply in to the soil, which in future facilitates the adsorption and stabilization of more organic material into the soil, as compared to the way in which straw and residue remain concentrated on top of the ground (Paustian et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Tillage Methods, Nitrogen Fertilizer and Stubble Mulching on Soil Carbon, Emission of CO2, N2O and Future Strategies

Tanveer¹,

Wen²,

Asif³

et al. 2013

Crop Production

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Impact of tillage practices on organic carbon and nitrogen storage in cool, humid soils of eastern Canada

Cited by 345 publications

References 16 publications

Factors influencing mineralizable carbon in a landscape with variable topography

Factors influencing mineralizable carbon in a landscape with variable topography

Formas de carbono em Latossolo Vermelho Eutroférrico sob plantio direto no sistema biogeográfico do cerrado

Effects of Different Tillage Methods, Nitrogen Fertilizer and Stubble Mulching on Soil Carbon, Emission of CO2, N2O and Future Strategies

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