TY - JOUR
T1 - 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
AU - Islam, Mohammad Nazrul
AU - Bell, Richard W.
AU - Barrett-Lennard, Edward G.
AU - Maniruzzaman, Mohammad
N1 - Funding Information:
We would like to gratefully acknowledge all the staff at the Soil Science Division and Irrigation and Water Management Division, Bangladesh Rice Research Institute and Agro-technology Discipline, Khulna University, Bangladesh, for their kind assistance to analyze soil and plant samples. Special thanks to landowner Asim Bala, who provided the land for conducting research. We also wish to express our heartiest thanks to the Australian Centre for International Agricultural Research (Project LWR/2014/073) for grants and awarding a John Allwright Fellowship to the senior author. This paper was strongly influenced by the comments of two anonymous reviewers who was also thank.
Funding Information:
Open Access funding enabled and organized by CAUL and its Member Institutions Australia Centre for International Agricultural Research (ACIAR) provided the funds for the research (LWR/2015/073) and a John Allwright Fellowship to the senior author.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/10
Y1 - 2022/10
N2 - 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, ECw, 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 (Ψs) 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 Ψs and decreased Na+/K+ ratio in leaves.
AB - 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, ECw, 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 (Ψs) 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 Ψs and decreased Na+/K+ ratio in leaves.
KW - Cultivar Hysun-33
KW - Leaf water potential
KW - Na/K ratio in leaf
KW - Relative growth rate
KW - SEW
KW - Solute potential of soil
UR - http://www.scopus.com/inward/record.url?scp=85132970319&partnerID=8YFLogxK
U2 - 10.1007/s11104-022-05560-9
DO - 10.1007/s11104-022-05560-9
M3 - Article
AN - SCOPUS:85132970319
SN - 0032-079X
VL - 479
SP - 679
EP - 697
JO - Plant and Soil
JF - Plant and Soil
IS - 1-2
ER -