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- W4283693374 abstract "Abstract Purpose While well-designed drainage systems could improve crop growth and yield by mitigating waterlogging and salinity stresses, field evidence of the yield responses to changes in plant-water relations and ion concentrations in leaves is scarce. We investigated the changes in ion concentrations in leaves and plant-water relations of sunflower caused by drainage in waterlogged saline soil, and their relationships to growth and yield. Methods Over two growing seasons, we tested four drainage treatments: undrained, surface drains (SD; 0.1 m deep, 1.8 m apart), subsoil drains (SSD; 0.5 m deep, 4.5 m apart) and SSD + SD. All plots were inundated (2–3 cm depth; water salinity, EC w , 1.5–2.5 dS m –1 ) for 24 h at vegetative emergence and at the 8-leaf stage before opening drains. Results Relative to the most drained treatment (SSD + SD), the undrained treatment caused higher waterlogging at 0–30 cm depth, and decreased solute potential (Ψ s ) of soil at 7.5 cm to 52–374 kPa, leaf K + by 5–20%, stomatal conductance by 5–37% and leaf greenness by 12–25%, but increased leaf Na + by 25–70%, Na + /K + ratio by 38–100% and leaf water potential by 90–250 kPa throughout the cropping season; these changes were closely related to reduced growth and yield. Conclusions The improved yield from the combination of shallow surface and sub-surface drains was attributed to an alleviation of salinity-waterlogging stress early in the season and to increased soil water late in the season that increased Ψ s and decreased Na + /K + ratio in leaves." @default.
- W4283693374 created "2022-06-30" @default.
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- W4283693374 date "2022-06-28" @default.
- W4283693374 modified "2023-10-14" @default.
- W4283693374 title "Growth and yield responses of sunflower to drainage in waterlogged saline soil are caused by changes in plant-water relations and ion concentrations in leaves" @default.
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- W4283693374 doi "https://doi.org/10.1007/s11104-022-05560-9" @default.
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