Abstract
ABSTRACT In Pernambuco, state in the northeastern region of Brazil, in the coastal areas, due to the intrusion of seawater, the waters used for sugarcane irrigation can have high salt contents and cause serious problems to soil and plant. The present study aimed to evaluate the effects of irrigation with saline water on the physiology of sugarcane, variety RB867515, irrigated under five salinity levels of 0.5; 2.0; 3.5; 5.0 and 6.5 dS m-1 in a completely randomized design, with four replicates in drainage lysimeters. The study was conducted in the period from December 2014 to June 2015, at the Federal Rural University of Pernambuco (UFRPE). Salinity levels were obtained by dissolving NaCl and CaCl2 in water from the local supply system (ECw = 0.5 dS m-1). Leaves were analyzed for stomatal conductance, transpiration and photosynthesis at 140, 229 and 320 days after planting (DAP) and for water potential at 137, 243 and 318 DAP. Increase in irrigation water salinity inhibited all variables at the respective plant ages and with greater intensity in the first evaluations (140 and 229 DAP) for stomatal conductance and transpiration. Photosynthesis and water potential showed the greatest linear reductions at the last data collection (320 and 318 DAP), respectively. Increase in salinity of irrigation water hampered water potential and gas exchange in the leaves of RB867515 sugarcane.
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Claims 3
Claim · model-written summary
Increasing salinity of irrigation water hampered water potential and gas exchange in the leaves of RB867515 sugarcane.
- Taxon
- sugarcanet0
- Material
- RB867515e0
- Organ / stage
- leavese0
- Treatment
- salinity of irrigation watere0
- Outcome
- water potential and gas exchangee0
- Direction
- hamperede0
Not reportedComparator
Verbatim
e0“Increase in salinity of irrigation water hampered water potential and gas exchange in the leaves of RB867515 sugarcane”
t0“sugarcane irrigated with saline waters”
Claim · model-written summary
Increasing irrigation water salinity inhibited stomatal conductance and transpiration at each plant age, with greater intensity in the first evaluations (140 and 229 DAP).
- Taxon
- sugarcanet0
- Treatment
- irrigation water salinitye0
- Outcome
- stomatal conductance and transpiratione0
- Direction
- inhibitede0
- Qualifier
- greater intensity in the first evaluations (140 and 229 DAP)e0
Not reportedComparator
Verbatim
e0“Increase in irrigation water salinity inhibited all variables at the respective plant ages and with greater intensity in the first evaluations (140 and 229 DAP) for stomatal conductance and transpiration”
t0“sugarcane irrigated with saline waters”
Claim · model-written summary
Photosynthesis and water potential showed the greatest linear reductions with increasing salinity at the last data collection (320 and 318 DAP, respectively).
- Taxon
- sugarcanet0
- Treatment
- irrigation water salinitye0
- Outcome
- Photosynthesis and water potentiale1
- Direction
- linear reductionse1
- Qualifier
- last data collection (320 and 318 DAP)e1
Not reportedComparator
Verbatim
e0“Increase in irrigation water salinity inhibited all variables”
e1“Photosynthesis and water potential showed the greatest linear reductions at the last data collection (320 and 318 DAP), respectively”
t0“sugarcane irrigated with saline waters”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.