The oxygen isotopic signature of soil- and plant-derived sulphate is controlled by fertilizer type and water source
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The oxygen isotopic signature of soil- and plant-derived sulphate is controlled by fertilizer type and water source. / Novak, Vlastimil; Khatri, Purna Kumar; Laursen, Kristian Holst.
In: Plant, Cell and Environment, Vol. 44, No. 1, 2021, p. 203-215.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The oxygen isotopic signature of soil- and plant-derived sulphate is controlled by fertilizer type and water source
AU - Novak, Vlastimil
AU - Khatri, Purna Kumar
AU - Laursen, Kristian Holst
PY - 2021
Y1 - 2021
N2 - The oxygen isotope signature of sulphate (delta O-18(sulphate)) is increasingly used to study nutritional fluxes and sulphur transformation processes in a variety of natural environments. However, mechanisms controlling the delta(18)O(sulphate)signature in soil-plant systems are largely unknown. The objective of this study was to determine key factors, which affect delta(18)O(sulphate)values in soil and plants. The impact of an(18)O-water isotopic gradient and different types of fertilizers was investigated in a soil incubation study and a radish (Raphanus sativusL.) greenhouse growth experiment. Water provided 31-64% of oxygen atoms in soil sulphate formed via mineralization of organic residues (green and chicken manures) while 49% of oxygen atoms were derived from water during oxidation of elemental sulphur. In contrast,delta(18)O(sulphate)values of synthetic fertilizer were not affected by soil water. Correlations between soil and plant delta(18)O(sulphate)values were controlled by water delta O-18 values and fertilizer treatments. Additionally, plant delta S-34 data showed that the sulphate isotopic composition of plants is a function of S assimilation. This study documents the potential of using compound-specific isotope ratio analysis for investigating and tracing fertilization strategies in agricultural and environmental studies.
AB - The oxygen isotope signature of sulphate (delta O-18(sulphate)) is increasingly used to study nutritional fluxes and sulphur transformation processes in a variety of natural environments. However, mechanisms controlling the delta(18)O(sulphate)signature in soil-plant systems are largely unknown. The objective of this study was to determine key factors, which affect delta(18)O(sulphate)values in soil and plants. The impact of an(18)O-water isotopic gradient and different types of fertilizers was investigated in a soil incubation study and a radish (Raphanus sativusL.) greenhouse growth experiment. Water provided 31-64% of oxygen atoms in soil sulphate formed via mineralization of organic residues (green and chicken manures) while 49% of oxygen atoms were derived from water during oxidation of elemental sulphur. In contrast,delta(18)O(sulphate)values of synthetic fertilizer were not affected by soil water. Correlations between soil and plant delta(18)O(sulphate)values were controlled by water delta O-18 values and fertilizer treatments. Additionally, plant delta S-34 data showed that the sulphate isotopic composition of plants is a function of S assimilation. This study documents the potential of using compound-specific isotope ratio analysis for investigating and tracing fertilization strategies in agricultural and environmental studies.
KW - compound-specific
KW - fertilizer
KW - isotopes
KW - mineralization
KW - plant
KW - soil
KW - sulphate
KW - sulphur
KW - SULFUR
KW - FRACTIONATION
KW - DELTA-O-18
KW - EXCHANGE
KW - RATIO
KW - BIOGEOCHEMISTRY
KW - PHOSPHORUS
KW - MECHANISMS
KW - PHOSPHATE
KW - NITROGEN
U2 - 10.1111/pce.13877
DO - 10.1111/pce.13877
M3 - Journal article
C2 - 32844439
VL - 44
SP - 203
EP - 215
JO - Plant, Cell and Environment
JF - Plant, Cell and Environment
SN - 0140-7791
IS - 1
ER -
ID: 249858637