Abstract
Watermelon [ Citrullus lanatus (Thunb) Matsum. & Nakai.] seedlings may be repeatedly exposed to temperatures alternating between almost freezing and optimum soon after field transplanting. `Carnival', `Crimson Sweet', `Millionaire' and `Crimson Trio' watermelon transplants were exposed to cold temperature stress at 2 ± 1 °C in a walk-in cooler and then to 29 ± 5 °C in a greenhouse immediately before field planting to simulate temperature alternations that may occur after field transplanting. Cold-stressed transplants were field planted after all risk of ambient cold stress passed. In 1998, transplants were exposed to 2 °C from 9 hours to 54 hours, and in 1999 from 9 to 81 hours. Early yields of all cultivars, except Carnival, significantly decreased with increasing hours of cold stress in both years. Total yields of `Carnival' decreased linearly in both years with a 10% yield reduction occurring from 14 to 15 hours of cold stress. `Crimson Sweet' yields were reduced in 1999 only, with 16 hours of cold stress reducing yield 10%.
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Claims 3
Claim · model-written summary
Early yields of all cultivars except Carnival decreased significantly with increasing hours of cold stress in both years.
- Taxon
- Watermelon
Citrullus lanatust0 - Material
- all cultivars, except Carnivale1
- Treatment
- cold stresse1
- Outcome
- Early yieldse1
- Direction
- decreasede1
- Qualifier
- in both yearse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon”
e1“Early yields of all cultivars, except Carnival, significantly decreased with increasing hours of cold stress in both years”
Claim · model-written summary
Total yields of Carnival decreased linearly in both years, with a 10% yield reduction at 14 to 15 hours of cold stress.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Carnivale1
- Treatment
- cold stresse1
- Outcome
- Total yieldse1
- Direction
- decreasede1
- Value
- 10%e1
- Qualifier
- from 14 to 15 hours of cold stresse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon”
e1“Total yields of `Carnival' decreased linearly in both years with a 10% yield reduction occurring from 14 to 15 hours of cold stress”
Claim · model-written summary
Crimson Sweet yields were reduced in 1999 only, with 16 hours of cold stress reducing yield by 10%.
- Taxon
- WatermelonCitrullus lanatust0
- Material
- Crimson Sweete1
- Treatment
- cold stresse1
- Outcome
- yieldse1
- Direction
- reducede1
- Value
- 10%e1
- Qualifier
- in 1999 onlye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Watermelon”
e1“`Crimson Sweet' yields were reduced in 1999 only, with 16 hours of cold stress reducing yield 10%”
The same questions in other papers
cold · yield · Citrullus lanatus (watermelon)Results agree
2 papers in the same direction as this paper
- negative
- no effect
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.