Paper · 2025 · Polish Journal of Environmental Studies

Gas Exchange Characteristics, WaterRelations, and Irrigation Water Use Efficiencyof Wheat Influenced by Potassium NutritionUnder Water-Limited Conditions

Muhammad Usman; Mudassir Aziz; Muhammad Mansoor Javaid; et al.

15
claims
29
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by-nc

Abstract

Potassium is an essential nutrient that contributes to the survival of wheat once subjected to water deficit conditions. A field trial was conducted using a randomized complete block design with splitplot arrangements. Different water regimes, including well-watered and water-deficit conditions at the tillering stage, were maintained in the main plot. Subplot treatments included no potassium; soil applied the recommended dose of potassium, distilled water spray, 1% potassium spray, and 2% potassium spray, respectively. A significantly higher value of gas exchange characteristics, water relations, and wheat yield was recorded with the foliar application of potassium than those of the control. The foliar spray of 2% potassium was superior to soil-applied potash under water deficit conditions, with a 25.33% improvement in grain yield of wheat. Similarly, a 47.58% and 25.76% improvement in grain yield of wheat was recorded with 2% and 1% potassium spray as compared to that of distilled water spray under water deficit conditions. The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively. Irrigation water use efficiency under drought conditions was 51.02% higher with a 2% foliar spray of potash than in well-watered conditions where potassium was not applied. The benefit-cost ratio was recorded as 1.24 and 1.30 with 2% foliar application of potassium and soil-applied potassium, respectively. Our findings displayed that a 2% foliar spray of potash can be utilized under water deficit conditions for improvement of grain yield, whereas soil application of potash can be utilized with additional benefits.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 15

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Foliar potassium increased wheat gas exchange, water relations and yield relative to control.

Treatment
foliar application of potassiume0
Outcome
gas exchange characteristics, water relations, and wheat yielde0
Direction
highere0
Comparator
controle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A significantly higher value of gas exchange characteristics, water relations, and wheat yield was recorded with the foliar application of potassium than those of the control.”

✓ located verbatim in the source · abstract, characters 525–700 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A 2% potassium spray improved wheat grain yield 25.33% relative to soil-applied potash under water deficit.

Treatment
foliar spray of 2% potassiume0
Outcome
grain yield of wheate0
Direction
improvemente0
Value
25.33%e0
Qualifier
under water deficit conditionse0
Comparator
soil-applied potashe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The foliar spray of 2% potassium was superior to soil-applied potash under water deficit conditions, with a 25.33% improvement in grain yield of wheat.”

✓ located verbatim in the source · abstract, characters 701–852 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A 2% potassium spray improved wheat grain yield 47.58% relative to distilled water spray under water deficit.

Treatment
2%e0
Outcome
grain yield of wheate0
Direction
improvemente0
Value
47.58%e0
Qualifier
under water deficit conditionse0
Comparator
distilled water spraye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“a 47.58% and 25.76% improvement in grain yield of wheat was recorded with 2% and 1% potassium spray as compared to that of distilled water spray under water deficit conditions.”

✓ located verbatim in the source · abstract, characters 864–1040 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A 1% potassium spray improved wheat grain yield 25.76% relative to distilled water spray under water deficit.

Treatment
1% potassium spraye0
Outcome
grain yield of wheate0
Direction
improvemente0
Value
25.76%e0
Qualifier
under water deficit conditionse0
Comparator
distilled water spraye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“a 47.58% and 25.76% improvement in grain yield of wheat was recorded with 2% and 1% potassium spray as compared to that of distilled water spray under water deficit conditions.”

✓ located verbatim in the source · abstract, characters 864–1040 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat chlorophyll content was reported at 21.5%.

Outcome
chlorophyll contente0
Value
21.5%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat cell membrane stability was reported at 26.07%.

Outcome
cell membrane stabilitye0
Value
26.07%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat relative water content was reported at 2.79%.

Outcome
relative water contente0
Value
2.79%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat net photosynthetic rate was reported at 84.41%.

Outcome
net photosynthetic ratee0
Value
84.41%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat stomatal conductance was reported at 13.84%.

Outcome
stomatal conductancee0
Value
13.84%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat transpiration rate was reported at 10%.

Outcome
transpiration ratee0
Value
10%e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The chlorophyll content, cell membrane stability, relative water content, net photosynthetic rate, stomatal conductance, and transpiration rate were 21.5%, 26.07%, 2.79%, 84.41%, 13.84%, and 10%, respectively.”

✓ located verbatim in the source · abstract, characters 1041–1250 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Irrigation water use efficiency was 51.02% higher with 2% foliar potash under drought than in well-watered conditions without potassium.

Treatment
2% foliar spray of potashe0
Outcome
Irrigation water use efficiencye0
Direction
highere0
Value
51.02%e0
Comparator
well-watered conditions where potassium was not appliede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Irrigation water use efficiency under drought conditions was 51.02% higher with a 2% foliar spray of potash than in well-watered conditions where potassium was not applied.”

✓ located verbatim in the source · abstract, characters 1251–1423 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The benefit-cost ratio with 2% foliar potassium was 1.24.

Treatment
2% foliar application of potassiume0
Outcome
benefit-cost ratioe0
Value
1.24e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The benefit-cost ratio was recorded as 1.24 and 1.30 with 2% foliar application of potassium and soil-applied potassium, respectively.”

✓ located verbatim in the source · abstract, characters 1424–1558 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The benefit-cost ratio with soil-applied potassium was 1.30.

Treatment
soil-applied potassiume0
Outcome
benefit-cost ratioe0
Value
1.30e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The benefit-cost ratio was recorded as 1.24 and 1.30 with 2% foliar application of potassium and soil-applied potassium, respectively.”

✓ located verbatim in the source · abstract, characters 1424–1558 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend 2% foliar potash under water deficit to improve wheat grain yield.

Treatment
2% foliar spray of potashe0
Outcome
improvement of grain yielde0
Qualifier
under water deficit conditionse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“a 2% foliar spray of potash can be utilized under water deficit conditions for improvement of grain yield”

✓ located verbatim in the source · abstract, characters 1587–1692 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend soil potash application for additional benefits.

Treatment
soil application of potashe0
Outcome
additional benefitse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“soil application of potash can be utilized with additional benefits.”

✓ located verbatim in the source · abstract, characters 1702–1770 · show in text ↑
t0

“Wheat”

✓ located verbatim in the source · title, characters 84–89 · show in text ↑

potassium · physiology: gas exchange · Triticum aestivum (wheat)Positive and negative results

4 papers: 2 positive, 2 negative or no effect

1 paper in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive
See all 4 papers →

application · physiology: gas exchange · Triticum aestivum (wheat)Positive and negative results

23 papers: 21 positive, 2 negative or no effect

20 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. negative
  3. negative

19 papers more in this group

See all 23 papers →

application · physiology: water · Triticum aestivum (wheat)Positive and negative results

51 papers: 49 positive, 2 negative or no effect

48 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive

47 papers more in this group

See all 51 papers →

potassium · yield · Triticum aestivum (wheat)Positive and negative results

257 papers: 227 positive, 30 negative or no effect

226 papers in the same direction as this paper · 29 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. negative
  3. no effect

253 papers more in this group

See all 257 papers →

application · yield · Triticum aestivum (wheat)Positive and negative results

877 papers: 795 positive, 82 negative or no effect

794 papers in the same direction as this paper · 75 in the opposite direction · 7 reporting no difference from an alternative

  1. positive
  2. positive
  3. no effect

873 papers more in this group

See all 877 papers →

potassium · physiology: water · Triticum aestivum (wheat)Results agree

15 papers: 15 positive, 0 negative or no effect

14 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

11 papers more in this group

See all 15 papers →

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.