Abstract
This study was designed to evaluate different threshold values of crop water stress index (CWSI) to schedule irrigation for watermelon (Citrullus vulgaris) grown with drip irrigation Irrigations were started when CWSI values reached to 0.2, 0.4, 0.6, 0.8 and 1.0 (non-irrigation).The CWSI values were computed from measurements of canopy temperature, air temperature and vapor pressure defi cit.The total irrigations amount of 342, 280, 248 and 193 mm were applied to the 0.2, 0.4, 0.6 and 0.8 CWSI treatments, respectively.The maximum seasonal evapotranspiration (ET) as 412 mm was measured from 0.2 CWSI treatment.Irrigation levels signifi cantly affected fruit yield.Although the highest fruit yield (76.3 t ha -1 ) was obtained from the 0.2 CWSI treatment, the 0.4 and 0.6 of CWSI treatments were statistically in the same letter group with this treatment.Also, maximum water use effi ciency (WUE) and irrigation water use effi ciency (IWUE) were obtained from 0.6 of CWSI treatment as 22.1 and 13.3 kg m -3 , respectively.Therefore, based on these results, 0.6 of CWSI value should be used for irrigation time of watermelon under Tekirdag, Turkey conditions.
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Claims 8
Claim · model-written summary
CWSI thresholds 0.2, 0.4, 0.6 and 0.8 received 342, 280, 248 and 193 mm irrigation, respectively.
- Taxon
- watermelon
Citrullus lanatuse0 - Outcome
- total irrigations amounte1
- Value
- 342, 280, 248 and 193 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“The total irrigations amount of 342, 280, 248 and 193 mm were applied to the 0.2, 0.4, 0.6 and 0.8 CWSI treatments, respectively.”
Claim · model-written summary
The 0.2 CWSI treatment had maximum seasonal evapotranspiration of 412 mm.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 0.2 CWSI treatmente1
- Outcome
- seasonal evapotranspiration (ET)e1
- Direction
- maximume1
- Value
- 412 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“The maximum seasonal evapotranspiration (ET) as 412 mm was measured from 0.2 CWSI treatment.”
Claim · model-written summary
Irrigation levels significantly affected fruit yield.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- Irrigation levelse1
- Outcome
- fruit yielde1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“Irrigation levels signifi cantly affected fruit yield.”
Claim · model-written summary
The highest fruit yield was 76.3 t ha -1 under 0.2 CWSI.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 0.2 CWSI treatmente1
- Outcome
- fruit yielde1
- Direction
- higheste1
- Value
- 76.3 t ha -1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“the highest fruit yield (76.3 t ha -1 ) was obtained from the 0.2 CWSI treatment”
Claim · model-written summary
The 0.4 and 0.6 CWSI fruit yields were statistically grouped with 0.2 CWSI.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 0.4 and 0.6 of CWSI treatmentse1
- Outcome
- same letter groupe1
- Comparator
- 0.2 CWSI treatmente2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“the 0.4 and 0.6 of CWSI treatments were statistically in the same letter group with this treatment”
e2“the 0.2 CWSI treatment”
Claim · model-written summary
The 0.6 CWSI treatment maximized WUE at 22.1 kg m -3.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 0.6 of CWSI treatmente1
- Outcome
- water use effi ciency (WUE)e1
- Direction
- maximume1
- Value
- 22.1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“maximum water use effi ciency (WUE) and irrigation water use effi ciency (IWUE) were obtained from 0.6 of CWSI treatment as 22.1 and 13.3 kg m -3 , respectively.”
Claim · model-written summary
The 0.6 CWSI treatment maximized IWUE at 13.3 kg m -3.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 0.6 of CWSI treatmente1
- Outcome
- irrigation water use effi ciency (IWUE)e1
- Direction
- maximume1
- Value
- 13.3 kg m -3e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“maximum water use effi ciency (WUE) and irrigation water use effi ciency (IWUE) were obtained from 0.6 of CWSI treatment as 22.1 and 13.3 kg m -3 , respectively.”
Claim · model-written summary
The authors recommend a CWSI threshold of 0.6 for irrigation timing in Tekirdag.
- Taxon
- watermelonCitrullus lanatuse1
- Outcome
- 0.6 of CWSI value should be used for irrigation timee1
- Setting
- Tekirdag, Turkeye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watermelon (Citrullus vulgaris)”
e1“0.6 of CWSI value should be used for irrigation time of watermelon under Tekirdag, Turkey conditions.”
The same questions in other papers
drought · yield · Citrullus lanatus (watermelon)Results differ
2 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
5 papers more in this group
See all 9 papers →drought · physiology: water · Citrullus lanatus (watermelon)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
5 papers more in this group
See all 9 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.