The effect of drought and intercropping on chicory nutrient uptake from below 2 m studied in a multiple tracer setup
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The effect of drought and intercropping on chicory nutrient uptake from below 2 m studied in a multiple tracer setup. / Rasmussen, Camilla Ruø; Thorup-Kristensen, Kristian; Dresbøll, Dorte Bodin.
In: Plant and Soil, Vol. 446, 2020, p. 543–561.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - The effect of drought and intercropping on chicory nutrient uptake from below 2 m studied in a multiple tracer setup
AU - Rasmussen, Camilla Ruø
AU - Thorup-Kristensen, Kristian
AU - Dresbøll, Dorte Bodin
PY - 2020
Y1 - 2020
N2 - Aims: We tested if chicory acquires nutrients from soil layers down to 3.5 m depth and whether the deep nutrient uptake increases as a result of drought or intercropping with ryegrass and black medic. We also tested whether application of the trace elements Cs, Li, Rb, Sr and Se, as tracers, result in similar uptake rates. Methods: The methodological tests were carried out in a pilot experiment where the tracers were applied to 1 m depth in lucerne and red beet grown in tube rhizotrons. The dynamics of deep nutrient uptake in chicory was studied in large 4 m deep rhizoboxes. A drought was induced when roots had reached around 2 m depth. Results: Chicory acquired 15N from 3.5 m depth and trace element tracers from 2.3 m depth. We found no compensatory tracer uptake with depth during drought. We found some indications of a compensatory tracer uptake from 2.3 and 2.9 m depth in intercropped chicory. Application of equimolar amounts of trace elements resulted in similar excess tracer concentrations within species. Conclusion: Chicory demonstrates nutrient uptake from below 3 m but does not increase deep nutrient uptake as a response to limited topsoil nutrient availability induced by drought or intercropping.
AB - Aims: We tested if chicory acquires nutrients from soil layers down to 3.5 m depth and whether the deep nutrient uptake increases as a result of drought or intercropping with ryegrass and black medic. We also tested whether application of the trace elements Cs, Li, Rb, Sr and Se, as tracers, result in similar uptake rates. Methods: The methodological tests were carried out in a pilot experiment where the tracers were applied to 1 m depth in lucerne and red beet grown in tube rhizotrons. The dynamics of deep nutrient uptake in chicory was studied in large 4 m deep rhizoboxes. A drought was induced when roots had reached around 2 m depth. Results: Chicory acquired 15N from 3.5 m depth and trace element tracers from 2.3 m depth. We found no compensatory tracer uptake with depth during drought. We found some indications of a compensatory tracer uptake from 2.3 and 2.9 m depth in intercropped chicory. Application of equimolar amounts of trace elements resulted in similar excess tracer concentrations within species. Conclusion: Chicory demonstrates nutrient uptake from below 3 m but does not increase deep nutrient uptake as a response to limited topsoil nutrient availability induced by drought or intercropping.
KW - Cichorium intybus L
KW - Deep nutrient uptake
KW - Deep root growth
KW - Drought resistance
KW - Intercropping
KW - Trace element tracer
U2 - 10.1007/s11104-019-04348-8
DO - 10.1007/s11104-019-04348-8
M3 - Journal article
AN - SCOPUS:85075365052
VL - 446
SP - 543
EP - 561
JO - Plant and Soil
JF - Plant and Soil
SN - 0032-079X
ER -
ID: 234453284