Abstract
High temperatures in late spring, summer, and autumn are one of the main elements limiting cucumber production. Heat stress in cucumber plants leads to significant changes in sex expression and negative effects at the physiological stage, including decreased absorption of water and nutrients, decreased photosynthetic functions, and increased respiration, which in turn affects growth and production. Therefore, it is very difficult for cucumber plants exposed to heat stress to improve their productivity, especially in arid and semi-arid regions. Cucumber plants bear a variety of flower forms, including staminate, pistillate, and hermaphrodites that occur in different arrangements. In addition, maleness is considered the main problem in cucumber production, as it significantly reduces fruit yield. Recently, the growth, flowering, and productivity of plants have been controlled with the help of growth-regulating substances, and one of these substances is naphthalene acetic acid (NAA), which is of great importance in modifying sex in cucumber and various cucurbit crops. Two experiments were conducted during 2022 and 2023 during the summer season to study the effect of foliar spraying of two levels of potassium nitrate, 500 mg/L and 1000 mg/L, and two levels of NAA, 50 mg/L and 100 mg/L, individually and together, and the comparison treatment in nine treatments on growth traits, sex ratio, fruit traits and yield of cucumber (Cucumis sativas L.) plants in three replicates in a completely randomized block design. The results indicated that applying the treatment containing 1000 mg/L KNO3 + 100 mg/L NAA led to obtaining the highest value in most vegetable growth, flowering, and production parameters, with a significant increase compared to the control and all other treatments. Followed by treatments consisting of potassium nitrate and NAA, which gave high values in the traits of sex ratio %, fruit setting %, fruit yield, and most other traits. This study showed the importance of spraying with both NAA and potassium nitrate, individually or in combination, and the high combined effect of both in the treatments that contained each of them in the vegetative growth traits and floral traits such as the number of female flowers, the sexual ratio, fruit set percentage, weight fruit, length fruit, and the fruit yield in cucumber plants grown in the summer season with high temperatures
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Claims 4
Claim · model-written summary
The combined 1000 mg/L KNO3 and 100 mg/L NAA treatment had the highest vegetative growth, flowering and production parameters versus controls and other treatments.
- Taxon
- Cucumbers
Cucumis sativust0 - Treatment
- 1000 mg/L KNO3 + 100 mg/L NAAe0
- Outcome
- vegetable growth, flowering, and production parameterse0
- Direction
- higheste0
- Comparator
- the control and all other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying the treatment containing 1000 mg/L KNO3 + 100 mg/L NAA led to obtaining the highest value in most vegetable growth, flowering, and production parameters, with a significant increase compared to the control and all other treatments”
t0“Cucumbers”
Claim · model-written summary
Other potassium nitrate and NAA combinations gave high sex ratio, fruit setting and fruit yield.
- Taxon
- CucumbersCucumis sativust0
- Treatment
- potassium nitrate and NAAe0
- Outcome
- sex ratio %, fruit setting %, fruit yielde0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatments consisting of potassium nitrate and NAA, which gave high values in the traits of sex ratio %, fruit setting %, fruit yield, and most other traits”
t0“Cucumbers”
Claim · model-written summary
The authors report a strong combined effect of NAA and potassium nitrate on female flowers, sex ratio and fruit set.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Naphthalene Acetic Acid and Potassium Nitratet0
- Outcome
- number of female flowers, the sexual ratio, fruit set percentagee0
- Setting
- summer season with high temperaturese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high combined effect of both in the treatments that contained each of them in the vegetative growth traits and floral traits such as the number of female flowers, the sexual ratio, fruit set percentage, weight fruit, length fruit, and the fruit yield in cucumber plants grown in the summer season with high temperatures”
t0“Naphthalene Acetic Acid and Potassium Nitrate”
Claim · model-written summary
The authors report a strong combined effect on fruit weight, length and yield under summer heat.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- Naphthalene Acetic Acid and Potassium Nitratet0
- Outcome
- weight fruit, length fruit, and the fruit yielde0
- Setting
- summer season with high temperaturese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the high combined effect of both in the treatments that contained each of them in the vegetative growth traits and floral traits such as the number of female flowers, the sexual ratio, fruit set percentage, weight fruit, length fruit, and the fruit yield in cucumber plants grown in the summer season with high temperatures”
t0“Naphthalene Acetic Acid and Potassium Nitrate”
The same questions in other papers
1-naphthaleneacetic acid · yield · Cucumis sativus (cucumber)Positive and negative results
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- negative
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See all 10 papers →potassium nitrate · yield · Cucumis sativus (cucumber)Results agree
3 papers in the same direction as this paper
- positive
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- positive
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.