Using a Tri-Isotope (13C, 15N, 33P) Labelling Method to Quantify Rhizodeposition

Stevenel, Pierre; Frossard, Emmanuel; Abiven, Samuel; Rao, Idupulapati M.; Tamburini, F.; Oberson, Astrid

doi:10.1007/978-981-13-5767-1_10

Cited by 5 publications

(3 citation statements)

References 96 publications

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“…4). This simplification is made because of the difficulties in measuring quantitative characteristics of rhizodeposits in a soil medium (Oburger and Jones, 2018) but leads to erroneous calculations of the amount of carbon rhizodeposition when this assumption is violated (Stevenel et al, 2019). To assess the uncertainty of calculated values of subsoil carbon sequestration, we calculated how these values differ when the value of root δ 13 C is varied with ±25 % (Fig.…”

Section: Rates Of Net Carbon Rhizodepositionmentioning

confidence: 99%

The soil organic carbon stabilization potential of old and new wheat cultivars: a 13CO2-labeling study

Broek¹,

Ghiasi²,

Decock

et al. 2020

Biogeosciences

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Abstract. Over the past decades, average global wheat yields have increased by about 250 %, mainly due to the cultivation of high-yielding wheat cultivars. This selection process not only affected aboveground parts of plants, but in some cases also reduced root biomass, with potentially large consequences for the amount of organic carbon (OC) transferred to the soil. To study the effect of wheat breeding for high-yielding cultivars on subsoil OC dynamics, two old and two new wheat cultivars from the Swiss wheat breeding program were grown for one growing season in 1.5 m deep lysimeters and pulse labeled with 13CO2 to quantify the amount of assimilated carbon that was transferred belowground and can potentially be stabilized in the soil. The results show that although the old wheat cultivars with higher root biomass transferred more assimilated carbon belowground compared to more recent cultivars, no significant differences in net rhizodeposition were found between the different cultivars. As a consequence, the long-term effect of wheat cultivar selection on soil organic carbon (SOC) stocks will depend on the amount of root biomass that is stabilized in the soil. Our results suggest that the process of wheat selection for high-yielding cultivars resulted in lower amounts of belowground carbon translocation, with potentially important effects on SOC stocks. Further research is necessary to quantify the long-term importance of this effect.

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Section: Rates Of Net Carbon Rhizodepositionmentioning

confidence: 99%

The soil organic carbon stabilization potential of old and new wheat cultivars: a 13CO2-labeling study

Broek¹,

Ghiasi²,

Decock

et al. 2020

Biogeosciences

View full text Add to dashboard Cite

show abstract

“…calculations of the amount of carbon rhizodeposition when this assumption is violated (Stevenel et al, 2019). The latter is likely to be the case for two main reasons.…”

Section: Rates Of Net Carbon Rhizodepositionmentioning

confidence: 99%

“…Second, the fact that most carbon is allocated to belowground plant parts during the first 1 to months after growth initiation (Pausch and Kuzyakov, 2018) likely causes an important temporal variation in the 13 C enrichment of roots. Recently, Stevenel et al (2019) have shown that the δ 13 C value of roots of isotopically labeled Canavalia brasiliensis differed both temporally and spatially, as different parts of the root had a different isotopic value at the end of their 22-day experiment.…”

Section: Rates Of Net Carbon Rhizodepositionmentioning

confidence: 99%

The soil organic carbon stabilization potential of old and new wheat cultivars: a 13CO2 labelling study

Broek¹,

Ghiasi²,

Decock³

et al. 2020

Preprint

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Abstract. Over the past decades, average global wheat yields have increased by about 250 %, mainly due to the cultivation of high-yielding wheat cultivars. This selection process not only affected aboveground parts of plants, but in some cases also reduced the root biomass, with potentially large consequences for the amount of organic carbon (OC) transferred to the soil. To study the effect of wheat breeding for high-yielding cultivars on subsoil OC dynamics, two old and two new wheat cultivars from the Swiss wheat breeding program were grown for one growing season in 1.5 m-deep lysimeters and pulse-labelled with 13CO2, to quantify the amount of assimilated carbon that was transferred belowground and potentially stabilized in the soil. The results show that although the old wheat cultivars with higher root biomass transferred more assimilated carbon belowground compared to more recent cultivars, no significant differences in net soil organic carbon (SOC) stabilization were found between the different cultivars. As a consequence, the long-term effect of wheat cultivar selection on SOC stocks will depend on the amount of root biomass that is stabilized in the soil. Our results suggest that the process of wheat selection for high-yielding cultivars resulted in lower amounts of belowground carbon translocation, with potentially important effects on SOC stocks. Further research is necessary to quantify the long-term importance of this effect.

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Rhizodeposition: An Unseen Teaser of Nature and Its Prospects in Nutrients Dynamics

Patra

Sharma

Chattopadhyay

et al. 2021

Soil Science: Fundamentals to Recent Advances

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Using a Tri-Isotope (13C, 15N, 33P) Labelling Method to Quantify Rhizodeposition

Cited by 5 publications

References 96 publications

The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub>-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub>-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub> labelling study

Rhizodeposition: An Unseen Teaser of Nature and Its Prospects in Nutrients Dynamics

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Using a Tri-Isotope (13C, 15N, 33P) Labelling Method to Quantify Rhizodeposition

Cited by 5 publications

References 96 publications

The soil organic carbon stabilization potential of old and new wheat cultivars: a &lt;sup&gt;13&lt;/sup&gt;CO&lt;sub&gt;2&lt;/sub&gt;-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a &lt;sup&gt;13&lt;/sup&gt;CO&lt;sub&gt;2&lt;/sub&gt;-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a &lt;sup&gt;13&lt;/sup&gt;CO&lt;sub&gt;2&lt;/sub&gt; labelling study

Rhizodeposition: An Unseen Teaser of Nature and Its Prospects in Nutrients Dynamics

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The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub>-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub>-labeling study

The soil organic carbon stabilization potential of old and new wheat cultivars: a <sup>13</sup>CO<sub>2</sub> labelling study