Abstract
The experiment was conducted to explore the effectiveness of harvested rainwater for supplemental irrigation on watermelon in gravel and plastic mulched field in Gansu, China. The results indicated that in watermelon growing period, soil water content (\%SWC\%) of all treatments tended to decrease with fluctuating; the \%SWC\% of 0～120 cm decreased by 2.59%～4.13%, the more irrigation amount, the less the \%SWC\% decreased. The total water consumption was smaller than that of the other field crops. The water consumptions of various treatments varied from 175.9 mm to 218.9 mm; the water consumption increased with irrigation amount increasing. The yields of various treatments were significantly different; the yield, average fruit weight and the number of fruit increased with the irrigation quantities. Besides, the irrigation quantity had influence on the soluble carbohydrate content of watermelon; when the irrigation quantity was less than 45 mm, the difference of the soluble carbohydrate content was little; but when the irrigation quantity was 67.5 mm, the soluble carbohydrate content decreased by 4.4%. Proper irrigation can promote water use efficiency (\%WUE\%) of watermelon; the treatment of 67.5 mm by drip\|irrigation had the highest \%WUE\%, the \%WUE\% was 267.2 kg\5hm -2 \5mm -1 , which was 17.0% more than that of the no supplemental irrigation. However, with supplemental irrigation quantity increased, water irrigation efficiency and economic benefit of supplemental irrigation decreased. Proper supplemental irrigation can increase yield and WUE, and improve quality. The results demonstrated that harvested rainwater for supplemental irrigation on watermelon in gravel\|mulched field was an economic and high\|effective way of rainwater utilization; the best irrigation quantity is about 45 mm.
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Claims 11
Claim · model-written summary
Soil water content declined by 2.59% to 4.13%.
- Taxon
- Watermelon
Citrullus lanatust0 - Outcome
- \%SWC\%e0
- Direction
- decreasede0
- Value
- 2.59%～4.13%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the \%SWC\% of 0～120 cm decreased by 2.59%～4.13%”
t0“Watermelon”
Claim · model-written summary
Greater irrigation meant a smaller soil water decline.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation amounte0
- Outcome
- \%SWC\%e0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the more irrigation amount, the less the \%SWC\% decreased”
t0“Watermelon”
Claim · model-written summary
Water consumption ranged from 175.9 to 218.9 mm.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- water consumptionse0
- Value
- 175.9 mm to 218.9 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water consumptions of various treatments varied from 175.9 mm to 218.9 mm”
t0“Watermelon”
Claim · model-written summary
Water consumption rose with irrigation amount.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation amounte0
- Outcome
- water consumptione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water consumption increased with irrigation amount increasing”
t0“Watermelon”
Claim · model-written summary
Yield differed significantly across treatments.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- various treatmentse0
- Outcome
- yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields of various treatments were significantly different”
t0“Watermelon”
Claim · model-written summary
Yield, fruit weight and fruit number increased with irrigation quantity.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation quantitiese0
- Outcome
- yield, average fruit weight and the number of fruite0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield, average fruit weight and the number of fruit increased with the irrigation quantities”
t0“Watermelon”
Claim · model-written summary
Soluble carbohydrate content differed little below 45 mm irrigation.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation quantity was less than 45 mme0
- Outcome
- soluble carbohydrate contente0
- Direction
- difference of the soluble carbohydrate content was littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the irrigation quantity was less than 45 mm, the difference of the soluble carbohydrate content was little”
t0“Watermelon”
Claim · model-written summary
Soluble carbohydrate content decreased 4.4% at 67.5 mm irrigation.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- irrigation quantity was 67.5 mme0
- Outcome
- soluble carbohydrate contente0
- Direction
- decreasede0
- Value
- 4.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the irrigation quantity was 67.5 mm, the soluble carbohydrate content decreased by 4.4%”
t0“Watermelon”
Claim · model-written summary
Water use efficiency peaked at 267.2 kg\5hm -2 \5mm -1 with 67.5 mm drip irrigation, 17.0% above no supplemental irrigation.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- 67.5 mm by drip\|irrigatione0
- Outcome
- \%WUE\%e0
- Direction
- higheste0
- Value
- 267.2 kg\5hm -2 \5mm -1e0
- Qualifier
- 17.0% moree0
- Comparator
- no supplemental irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment of 67.5 mm by drip\|irrigation had the highest \%WUE\%, the \%WUE\% was 267.2 kg\5hm -2 \5mm -1 , which was 17.0% more than that of the no supplemental irrigation”
t0“Watermelon”
Claim · model-written summary
Water irrigation efficiency and economic benefit declined as irrigation quantity increased.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- supplemental irrigation quantitye0
- Outcome
- water irrigation efficiency and economic benefite0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with supplemental irrigation quantity increased, water irrigation efficiency and economic benefit of supplemental irrigation decreased”
t0“Watermelon”
Claim · model-written summary
The authors recommended about 45 mm irrigation.
- Taxon
- WatermelonCitrullus lanatust0
- Outcome
- best irrigation quantity is about 45 mme0
- Value
- 45 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the best irrigation quantity is about 45 mm”
t0“Watermelon”
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