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- W2892276404 abstract "Hydraulic redistribution (HR) by woody vegetation has been proposed as a potential water source for crops in intercropped systems. The native woody shrub, Guiera senegalensis J.F. Gmel, grows in the fields of farmers across the African Sahel and has shown profound yield benefits to associated pearl millet (Penisetum glaucum) crops, especially in drought years. We tested whether this benefit was a result of the shrubs performing hydraulic redistribution (HR) with pearl millet using some of this HR water. During an experimentally imposed drought, an enriched deuterium (2H) water tracer applied to 1 m deep roots of G. senegalensis shrubs was detected (2H ≥ +300‰) in aboveground stems of intercropped millet within 12-96 hours of tracer introduction. The only viable path for the 2H-enriched H2O into millet was via HR by the shrubs, which confirmed active HR during the time when growing millet was under severe drought stress. Millet biomass production when intercropped with shrubs was over 900% greater than crops grown without shrubs present. Improvement of growing conditions previously found near shrubs cannot fully account for the benefit to associated millet under extreme drought stress without considering the positive impact of the transfer of HR water. This finding illuminates HR and water transfer as an important mechanism in a successful agroforestry system in a region where food security is a serious issue." @default.
- W2892276404 created "2018-09-27" @default.
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- W2892276404 date "2018-09-18" @default.
- W2892276404 modified "2023-10-17" @default.
- W2892276404 title "Hydraulic Redistribution by Native Sahelian Shrubs: Bioirrigation to Resist In-Season Drought" @default.
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- W2892276404 doi "https://doi.org/10.3389/fenvs.2018.00098" @default.
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