Responses of soil water storage and crop water use efficiency to changing climatic conditions: a lysimeter-based space-for-time approach. Groh, J., Vanderborght, J., Pütz, T., Vogel, H., Gründling, R., Rupp, H., Rahmati, M., Sommer, M., Vereecken, H., & Gerke, H. H. Hydrology and Earth System Sciences, 24(3):1211–1225, March, 2020.
Paper doi abstract bibtex Abstract. Future crop production will be affected by climatic changes. In several regions, the projected changes in total rainfall and seasonal rainfall patterns will lead to lower soil water storage (SWS), which in turn affects crop water uptake, crop yield, water use efficiency (WUE), grain quality and groundwater recharge. Effects of climate change on those variables depend on the soil properties and were often estimated based on model simulations. The objective of this study was to investigate the response of key variables in four different soils and for two different climates in Germany with a different aridity index (AI): 1.09 for the wetter (range: 0.82 to 1.29) and 1.57 for the drier (range: 1.19 to 1.77) climate. This is done by using high-precision weighable lysimeters. According to a “space-for-time” (SFT) concept, intact soil monoliths that were moved to sites with contrasting climatic conditions have been monitored from April 2011 until December 2017. Evapotranspiration (ET) was lower for the same soil under the relatively drier climate, whereas crop yield was significantly higher, without affecting grain quality. Especially “non-productive” water losses (evapotranspiration out of the main growing period) were lower, which led to a more efficient crop water use in the drier climate. A characteristic decrease of the SWS for soils with a finer texture was observed after a longer drought period under a drier climate. The reduced SWS after the drought remained until the end of the observation period which demonstrates carry-over of drought from one growing season to another and the overall long-term effects of single drought events. In the relatively drier climate, water flow at the soil profile bottom showed a small net upward flux over the entire monitoring period as compared to downward fluxes (groundwater recharge) or drainage in the relatively wetter climate and larger recharge rates in the coarser- as compared to finer-textured soils. The large variability of recharge from year to year and the long-lasting effects of drought periods on the SWS imply that long-term monitoring of soil water balance components is necessary to obtain representative estimates. Results confirmed a more efficient crop water use under less-plant-available soil moisture conditions. Long-term effects of changing climatic conditions on the SWS and ecosystem productivity should be considered when trying to develop adaptation strategies in the agricultural sector.
@article{groh_responses_2020,
title = {Responses of soil water storage and crop water use efficiency to changing climatic conditions: a lysimeter-based space-for-time approach},
volume = {24},
issn = {1607-7938},
shorttitle = {Responses of soil water storage and crop water use efficiency to changing climatic conditions},
url = {https://hess.copernicus.org/articles/24/1211/2020/},
doi = {10.5194/hess-24-1211-2020},
abstract = {Abstract. Future crop production will be affected by climatic
changes. In several regions, the projected changes in total rainfall and
seasonal rainfall patterns will lead to lower soil water storage (SWS), which
in turn affects crop water uptake, crop yield, water use efficiency (WUE), grain
quality and groundwater recharge. Effects of climate change on those
variables depend on the soil properties and were often estimated based on
model simulations. The objective of this study was to investigate the
response of key variables in four different soils and for two different
climates in Germany with a different aridity index (AI): 1.09 for the wetter
(range: 0.82 to 1.29) and 1.57 for the drier (range: 1.19 to 1.77) climate. This is done
by using high-precision weighable lysimeters. According to a
“space-for-time” (SFT) concept, intact soil monoliths that were moved to sites
with contrasting climatic conditions have been monitored from April 2011
until December 2017. Evapotranspiration (ET) was lower for the same soil under the relatively drier
climate, whereas crop yield was significantly higher, without affecting grain
quality. Especially “non-productive” water losses (evapotranspiration out of
the main growing period) were lower, which led to a more efficient crop water
use in the drier climate. A characteristic decrease of the SWS for soils
with a finer texture was observed after a longer drought period under a
drier climate. The reduced SWS after the drought remained until the end of
the observation period which demonstrates carry-over of drought from one
growing season to another and the overall long-term effects of single
drought events. In the relatively drier climate, water flow at the soil
profile bottom showed a small net upward flux over the entire monitoring
period as compared to downward fluxes (groundwater recharge) or drainage in
the relatively wetter climate and larger recharge rates in the coarser- as
compared to finer-textured soils. The large variability of recharge from
year to year and the long-lasting effects of drought periods on the SWS imply
that long-term monitoring of soil water balance components is necessary to
obtain representative estimates. Results confirmed a more efficient crop
water use under less-plant-available soil moisture conditions. Long-term effects of
changing climatic conditions on the SWS and ecosystem productivity should be
considered when trying to develop adaptation strategies in the agricultural
sector.},
language = {en},
number = {3},
urldate = {2022-11-02},
journal = {Hydrology and Earth System Sciences},
author = {Groh, Jannis and Vanderborght, Jan and Pütz, Thomas and Vogel, Hans-Jörg and Gründling, Ralf and Rupp, Holger and Rahmati, Mehdi and Sommer, Michael and Vereecken, Harry and Gerke, Horst H.},
month = mar,
year = {2020},
pages = {1211--1225},
}
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In several regions, the projected changes in total rainfall and seasonal rainfall patterns will lead to lower soil water storage (SWS), which in turn affects crop water uptake, crop yield, water use efficiency (WUE), grain quality and groundwater recharge. Effects of climate change on those variables depend on the soil properties and were often estimated based on model simulations. The objective of this study was to investigate the response of key variables in four different soils and for two different climates in Germany with a different aridity index (AI): 1.09 for the wetter (range: 0.82 to 1.29) and 1.57 for the drier (range: 1.19 to 1.77) climate. This is done by using high-precision weighable lysimeters. According to a “space-for-time” (SFT) concept, intact soil monoliths that were moved to sites with contrasting climatic conditions have been monitored from April 2011 until December 2017. Evapotranspiration (ET) was lower for the same soil under the relatively drier climate, whereas crop yield was significantly higher, without affecting grain quality. Especially “non-productive” water losses (evapotranspiration out of the main growing period) were lower, which led to a more efficient crop water use in the drier climate. A characteristic decrease of the SWS for soils with a finer texture was observed after a longer drought period under a drier climate. The reduced SWS after the drought remained until the end of the observation period which demonstrates carry-over of drought from one growing season to another and the overall long-term effects of single drought events. In the relatively drier climate, water flow at the soil profile bottom showed a small net upward flux over the entire monitoring period as compared to downward fluxes (groundwater recharge) or drainage in the relatively wetter climate and larger recharge rates in the coarser- as compared to finer-textured soils. The large variability of recharge from year to year and the long-lasting effects of drought periods on the SWS imply that long-term monitoring of soil water balance components is necessary to obtain representative estimates. Results confirmed a more efficient crop water use under less-plant-available soil moisture conditions. 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Future crop production will be affected by climatic\nchanges. In several regions, the projected changes in total rainfall and\nseasonal rainfall patterns will lead to lower soil water storage (SWS), which\nin turn affects crop water uptake, crop yield, water use efficiency (WUE), grain\nquality and groundwater recharge. Effects of climate change on those\nvariables depend on the soil properties and were often estimated based on\nmodel simulations. The objective of this study was to investigate the\nresponse of key variables in four different soils and for two different\nclimates in Germany with a different aridity index (AI): 1.09 for the wetter\n(range: 0.82 to 1.29) and 1.57 for the drier (range: 1.19 to 1.77) climate. This is done\nby using high-precision weighable lysimeters. According to a\n“space-for-time” (SFT) concept, intact soil monoliths that were moved to sites\nwith contrasting climatic conditions have been monitored from April 2011\nuntil December 2017. Evapotranspiration (ET) was lower for the same soil under the relatively drier\nclimate, whereas crop yield was significantly higher, without affecting grain\nquality. Especially “non-productive” water losses (evapotranspiration out of\nthe main growing period) were lower, which led to a more efficient crop water\nuse in the drier climate. A characteristic decrease of the SWS for soils\nwith a finer texture was observed after a longer drought period under a\ndrier climate. The reduced SWS after the drought remained until the end of\nthe observation period which demonstrates carry-over of drought from one\ngrowing season to another and the overall long-term effects of single\ndrought events. 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