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RESEARCH PAPER
Prediction of wheat grain yield by measuring root electrical capacitance at anthesis
1
Department of Soil Physics and Water Management, Institute for Soil Sciences, Centre for Agricultural Research, ELKH, Herman Ottó út 15., H-1022 Budapest, Hungary
2
Depatment of Cereal Breeding, Agricultural Institute, Centre for Africultural Research, ELKH, Herman Ottó út 15., H-1022 Budapest, Hungary
3
Department of Soil Biology, Institute for Soil Sciences, Centre for Agricultural Research, ELKH, Herman Ottó út 15., H-1022 Budapest, Hungary
Final revision date: 2021-05-12
Acceptance date: 2021-05-12
Publication date: 2021-06-10
Corresponding author
Imre Cseresnyés
Department of Soil Physics and Water Management, Institute for Soil Sciences, Centre for Agricultural Research, ELKH, Herman Ottó út 15., H-1022 Budapest, Hungary
Department of Soil Physics and Water Management, Institute for Soil Sciences, Centre for Agricultural Research, ELKH, Herman Ottó út 15., H-1022 Budapest, Hungary
Péter Mikó
Depatment of Cereal Breeding, Agricultural Institute, Centre for Africultural Research, ELKH, Brunszvik u. 2., H-2462, Martonvásár, Hungary
Depatment of Cereal Breeding, Agricultural Institute, Centre for Africultural Research, ELKH, Brunszvik u. 2., H-2462, Martonvásár, Hungary
Int. Agrophys. 2021, 35(2): 159-165
HIGHLIGHTS
- Root electrical capacitance was measured in field-grown wheat at anthesis.
- Three wheat cultivars were sown as sole crops and wheat–pea intercrops.
- Root capacitance was highly correlated with grain yield.
- Root capacitance and grain yield similarly varied among years, and was higher the intercrops.
- Root capacitance at anthesis predicted grain yield and cultivar responses to the environment.
KEYWORDS
aboveground biomassintercroppingnonintrusive root methodssaturation electrical capacitanceroot system size
TOPICS
ABSTRACT
This methodological study evaluated the efficiency of predicting aboveground biomass and grain yield in field-grown winter wheat by measuring the saturation root electrical capacitance at anthesis. Three cultivars were grown over a three-year period as sole crops and intercropped with winter pea at halved wheat density. The root capacitance readings were converted into saturation root electrical capacitance using the relevant soil water content, according to an empirical function. At plant scale, saturation root electrical capacitance at anthesis showed a significant (p < 0.001) linear regression with the total aboveground biomass (R2: 0.653-0.765) and grain yield (R2: 0.585-0.686) at maturity for each cultivar. At stand scale, both the mean saturation root electrical capacitance and shoot dry mass at anthesis and grain yield varied over the years, and were consistently higher for the intercrops compared to the sole crops. The relative increase in saturation root electrical capacitance due to intercropping corresponded with the changes in shoot dry mass and grain yield, especially in dry years. Saturation root electrical capacitance was significantly correlated with shoot dry mass (R2: 0.714-0.899) and grain yield (R2: 0.742-0.877) for each cultivar across all cropping systems and years. In conclusion, by mitigating the soil water content effect, the measurement of saturation root electrical capacitance at anthesis is adequate to forecast grain yield and cultivar response to a changing environment.
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| eISSN: | 2300-8725 |
| ISSN: | 0236-8722 |
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