Abstract
As a second crop, watermelons (Citrullus vulgaris, Crimson sweet) were grown in 2003 and 2004 in the Sanliurfa-Harran Plain in southeastern Turkey to determine the effect of preharvest water stress on fruit yield, quality (i.e., soluble solids contents and fruit size), leaf temperature, and some other physiological parameters. Preharvest drip irrigation treatments included (1) complete irrigation cutoff, dry (D); (2) full irrigation based on replenishment of soil water depleted from 0 to 90cm soil profile (C); (3) 75% full irrigation (IR1); (4) 50% full irrigation (IR2); and (5) 25% full irrigation (IR3) with 3-day irrigation interval. Treatment plots received the same level of irrigation water until the fruit formation stage, except for Treatment D. Then, different water stress levels were imposed on treatment plots. Irrigation water applied to the five respective treatments were 636, 511, 395, 245, and 120mm in 2003 and 648, 516, 403, 252, and 127mm in 2004. Results indicated that fruit yield was significantly lowered by reduced water rates. The seasonal average yield response factor (ky) for both years was 1.0, but it was 0.97 for 2003 and 0.98 for 2004. The highest marketable fruit yield, obtained from treatment C, was 32.4Mgha−1 in 2003 and 37.1Mgha−1 in 2004. D, IR2, and IR3 treatments reduced most measured parameters, except for soluble solids contents (SSC). Both the fruit size and SSC were significantly affected by late-season irrigation management; individual fruit weights were significantly reduced, whereas SSC increased in the IR2 and IR3 treatments compared to the control values. The writers’ results clearly indicated that reduced preharvest irrigation was detrimental. Water use efficiency (WUE) was significantly affected by irrigation treatments. Even a 25% reduction in the irrigation amount caused a 15% reduction in marketable yield. This indicates that deficit irrigation in the ripening stage significantly increased water use efficiency. The study demonstrated that a moderate deficit irrigation, which is replenishment up to 50% of soil water depleted in the root zone, can be successfully used to improve WUE under semiarid climatic conditions.
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Claims 13
Claim · model-written summary
Watermelon fruit yield was significantly lowered by reduced water rates.
- Taxon
- Watermelon
Citrullus lanatust0 - Treatment
- reduced water ratese1
- Outcome
- fruit yielde1
- Direction
- lowerede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Results indicated that fruit yield was significantly lowered by reduced water rates”
t0“Watermelon”
Claim · model-written summary
The seasonal average yield response factor (ky) of watermelon for both years was 1.0.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- yield response factor (ky)e1
- Value
- 1.0e1
- Qualifier
- for both yearse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The seasonal average yield response factor (ky) for both years was 1.0, but it was 0.97 for 2003 and 0.98 for 2004”
t0“Watermelon”
Claim · model-written summary
The yield response factor (ky) of watermelon was 0.97 in 2003.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- yield response factor (ky)e1
- Value
- 0.97e1
- Qualifier
- for 2003e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The seasonal average yield response factor (ky) for both years was 1.0, but it was 0.97 for 2003 and 0.98 for 2004”
t0“Watermelon”
Claim · model-written summary
The yield response factor (ky) of watermelon was 0.98 in 2004.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- yield response factor (ky)e1
- Value
- 0.98e1
- Qualifier
- for 2004e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The seasonal average yield response factor (ky) for both years was 1.0, but it was 0.97 for 2003 and 0.98 for 2004”
t0“Watermelon”
Claim · model-written summary
Under full irrigation (treatment C) the highest marketable fruit yield of watermelon was 32.4 Mg/ha in 2003.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- treatment Ce1
- Outcome
- highest marketable fruit yielde1
- Value
- 32.4Mgha−1e1
- Qualifier
- in 2003e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The highest marketable fruit yield, obtained from treatment C, was 32.4Mgha−1 in 2003 and 37.1Mgha−1 in 2004”
t0“Watermelon”
Claim · model-written summary
Under full irrigation (treatment C) the highest marketable fruit yield of watermelon was 37.1 Mg/ha in 2004.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- treatment Ce1
- Outcome
- highest marketable fruit yielde1
- Value
- 37.1Mgha−1e1
- Qualifier
- in 2004e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The highest marketable fruit yield, obtained from treatment C, was 32.4Mgha−1 in 2003 and 37.1Mgha−1 in 2004”
t0“Watermelon”
Claim · model-written summary
Treatments D, IR2 and IR3 reduced most measured parameters of watermelon, except soluble solids contents.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- D, IR2, and IR3 treatmentse1
- Outcome
- most measured parameterse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“D, IR2, and IR3 treatments reduced most measured parameters, except for soluble solids contents (SSC)”
t0“Watermelon”
Claim · model-written summary
Individual watermelon fruit weights were significantly reduced by late-season irrigation management (IR2 and IR3) compared with control values.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- IR2 and IR3 treatmentse1
- Outcome
- individual fruit weightse1
- Direction
- reducede1
- Comparator
- control valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“individual fruit weights were significantly reduced, whereas SSC increased in the IR2 and IR3 treatments compared to the control values”
t0“Watermelon”
Claim · model-written summary
Soluble solids contents of watermelon increased in IR2 and IR3 compared with control values.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- IR2 and IR3 treatmentse1
- Outcome
- SSCe1
- Direction
- increasede1
- Comparator
- control valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“individual fruit weights were significantly reduced, whereas SSC increased in the IR2 and IR3 treatments compared to the control values”
t0“Watermelon”
Claim · model-written summary
Water use efficiency of watermelon was significantly affected by the irrigation treatments.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation treatmentse1
- Outcome
- Water use efficiencye1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Water use efficiency (WUE) was significantly affected by irrigation treatments”
t0“Watermelon”
Claim · model-written summary
A 25% reduction in irrigation amount caused a 15% reduction in marketable watermelon yield.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- 25% reduction in the irrigation amounte1
- Outcome
- marketable yielde1
- Direction
- reductione1
- Value
- 15%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Even a 25% reduction in the irrigation amount caused a 15% reduction in marketable yield”
t0“Watermelon”
Claim · model-written summary
Deficit irrigation in the ripening stage significantly increased water use efficiency of watermelon.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- deficit irrigation in the ripening stagee1
- Outcome
- water use efficiencye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“deficit irrigation in the ripening stage significantly increased water use efficiency”
t0“Watermelon”
Claim · model-written summary
A moderate deficit irrigation, replenishing up to 50% of soil water depleted in the root zone, can be used to improve WUE of watermelon under semiarid conditions.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- moderate deficit irrigatione1
- Outcome
- improve WUEe1
- Setting
- semiarid climatic conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a moderate deficit irrigation, which is replenishment up to 50% of soil water depleted in the root zone, can be successfully used to improve WUE under semiarid climatic conditions”
t0“Watermelon”
The same questions in other papers
irrigation · quality: postharvest · Citrullus lanatus (watermelon)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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2 papers more in this group
See all 6 papers →irrigation · physiology: water · Citrullus lanatus (watermelon)Positive and negative results
15 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
13 papers more in this group
See all 17 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.