Data from: Comparative water use by maize, perennial crops, restored prairie, and poplar trees in the US Midwest
Data files
May 11, 2017 version files 2.73 MB
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Data table for Fig 1 b, c, d & Fig 2a_ daily soil water content of different crops.csv
1.42 MB
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Data table for Fig 1a & 2a_ Precipitation.csv
22.28 KB
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Data table for Fig 2b_ Maximum Biomass of switchgrass, miscanthus, prairie and grass mixture.csv
29.97 KB
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Data table for Fig 2b_ Maximum Biomass of corn.csv
3.44 KB
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Data table for Fig 2b_ Maximum Biomass of Poplar.csv
4.44 KB
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Data table for Fig 2c_WUE-biomass of all crops.csv
1.54 KB
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Data table for Fig 2d_Harvest yield.csv
4.04 KB
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Data table for Fig S1_Percent of days using SALUS.csv
519 B
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Data table for Fig S2_ Drained upper limit.csv
1.18 KB
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Data table for Fig S3_Growing season lengths.csv
508 B
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Data table.xls
1.23 MB
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README_for_Data table for Fig 1 b, c, d & Fig 2a_ daily soil water content of different crops.txt
1.12 KB
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README_for_Data table for Fig 1a & 2a_ Precipitation.txt
372 B
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README_for_Data table for Fig 2b_ Maximum Biomass of switchgrass, miscanthus, prairie and grass mixture.txt
1.31 KB
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README_for_Data table for Fig 2b_ Maximum Biomass of corn.txt
1.37 KB
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README_for_Data table for Fig 2b_ Maximum Biomass of Poplar.txt
748 B
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README_for_Data table for Fig 2c_WUE-biomass of all crops.txt
931 B
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README_for_Data table for Fig 2d_Harvest yield.txt
1.29 KB
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README_for_Data table for Fig S1_Percent of days using SALUS.txt
242 B
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README_for_Data table for Fig S2_ Drained upper limit.txt
497 B
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README_for_Data table for Fig S3_Growing season lengths.txt
334 B
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README_for_Data table.txt
4.88 KB
Abstract
Water use by plant communities across years of varying water availability indicates how terrestrial water balances will respond to climate change and variability as well as to land cover change. Perennial biofuel crops, likely grown mainly on marginal lands of limited water availability, provide an example of a potentially extensive future land cover conversion. We measured growing-season evapotranspiration (ET) based on daily changes in soil profile water contents in five perennial systems—switchgrass, miscanthus, native grasses, restored prairie, and hybrid poplar—and in annual maize (corn) in a temperate humid climate (Michigan, USA). Three study years (2010, 2011 and 2013) had normal growing-season rainfall (480–610 mm) whereas 2012 was a drought year (210 mm). Over all four years, mean (±SEM) growing-season ET for perennial systems did not greatly differ from corn (496 ± 21 mm), averaging 559 (±14), 458 (±31), 573 (±37), 519 (±30), and 492 (±58) mm for switchgrass, miscanthus, native grasses, prairie, and poplar, respectively. Differences in biomass production largely determined variation in water use efficiency (WUE). Miscanthus had the highest WUE in both normal and drought years (52–67 and 43 kg dry biomass ha−1 mm−1, respectively), followed by maize (40–59 and 29 kg ha−1 mm−1); the native grasses and prairie were lower and poplar was intermediate. That measured water use by perennial systems was similar to maize across normal and drought years contrasts with earlier modeling studies and suggests that rain-fed perennial biomass crops in this climate have little impact on landscape water balances, whether replacing rain-fed maize on arable lands or successional vegetation on marginal lands. Results also suggest that crop ET rates, and thus groundwater recharge, streamflow, and lake levels, may be less sensitive to climate change than has been assumed.