Abstract
On the base of applying nitrogen 200 kg/ha,a field experiment with three potassium rates( 0,130,260kg/ha) and four phosphorus rates( 0,90,130,170 kg/ha) was conducted to study the effects of combined application of P and K on the yield,quality and nutrient utilization efficiency of watermelon in Gravel-mulched field. A late mature watermelon cultivar,Longkang 9,was used as material. The results show that the yield and quality of watermelon increase with the increase of P and K application rates. With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively,and the average sugar,Vc and protein contents by 13. 75%,9. 48% and 11. 90% compared with P0. With the K260treatment,the single fruit weight,yield of watermelon increase by 9. 22% and 7. 54%,and the average sugar,nitrate contents increase by5. 86% and 11. 24% compared with K0. Significant positive interactive effect of P and K exists in the photosynthesis,yield and nutrient utilization efficiencies. Under low potassium rates,all the tested parameters keepincreasing within a certain range of P application rate,while under high potassium levels,with the increase of phosphorus application rate,better effects are obtained with individual P application than individual K application.The highest photosynthetic rate,yield and nutrient utilization efficiency were achieved with K260P170treatment.Therefore,the optimum fertilizer application rates were P2O5170 kg/ha and K2O 260 kg/ha at the base of applying N 200 kg/ha,hence,the most suitable ratio of N ∶ P2O5∶ K2O is 1 ∶ 0. 85 ∶ 1. 3 for good yield and quality of watermelon in this soil condition.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Watermelon yield and quality increased with P and K application rates.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- P and K application ratese0
- Outcome
- yield and qualitye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield and quality of watermelon increase with the increase of P and K application rates”
Claim · model-written summary
P170 increased single fruit weight by 13.75% versus P0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- P170treatmente0
- Outcome
- single fruit weighte0
- Direction
- increasee0
- Value
- 13. 75%e0
- Comparator
- P0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively”
e1“compared with P0”
Claim · model-written summary
P170 increased watermelon yield by 43.79% versus P0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- P170treatmente0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 43. 79%e0
- Comparator
- P0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively”
e1“compared with P0”
Claim · model-written summary
P170 increased average sugar content by 13.75% versus P0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- P170treatmente0
- Outcome
- average sugare0
- Direction
- increasee0
- Value
- 13. 75%e0
- Comparator
- P0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively,and the average sugar,Vc and protein contents by 13. 75%,9. 48% and 11. 90% compared with P0”
Claim · model-written summary
P170 increased Vc content by 9.48% versus P0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- P170treatmente0
- Outcome
- Vce0
- Direction
- increasee0
- Value
- 9. 48%e0
- Comparator
- P0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively,and the average sugar,Vc and protein contents by 13. 75%,9. 48% and 11. 90% compared with P0”
Claim · model-written summary
P170 increased protein content by 11.90% versus P0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- P170treatmente0
- Outcome
- protein contentse0
- Direction
- increasee0
- Value
- 11. 90%e0
- Comparator
- P0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With P170treatment,the single fruit weight and yield of watermelon increase by 13. 75% and 43. 79% respectively,and the average sugar,Vc and protein contents by 13. 75%,9. 48% and 11. 90% compared with P0”
Claim · model-written summary
K260 increased single fruit weight by 9.22% versus K0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- K260treatmente0
- Outcome
- single fruit weighte0
- Direction
- increasee0
- Value
- 9. 22%e0
- Comparator
- K0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the K260treatment,the single fruit weight,yield of watermelon increase by 9. 22% and 7. 54%,and the average sugar,nitrate contents increase by5. 86% and 11. 24% compared with K0”
Claim · model-written summary
K260 increased yield by 7.54% versus K0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- K260treatmente0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 7. 54%e0
- Comparator
- K0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the K260treatment,the single fruit weight,yield of watermelon increase by 9. 22% and 7. 54%,and the average sugar,nitrate contents increase by5. 86% and 11. 24% compared with K0”
Claim · model-written summary
K260 increased average sugar content by 5.86% versus K0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- K260treatmente0
- Outcome
- average sugare0
- Direction
- increasee0
- Value
- 5. 86%e0
- Comparator
- K0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the K260treatment,the single fruit weight,yield of watermelon increase by 9. 22% and 7. 54%,and the average sugar,nitrate contents increase by5. 86% and 11. 24% compared with K0”
Claim · model-written summary
K260 increased nitrate content by 11.24% versus K0.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- K260treatmente0
- Outcome
- nitrate contentse0
- Direction
- increasee0
- Value
- 11. 24%e0
- Comparator
- K0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the K260treatment,the single fruit weight,yield of watermelon increase by 9. 22% and 7. 54%,and the average sugar,nitrate contents increase by5. 86% and 11. 24% compared with K0”
Claim · model-written summary
P and K had a significant positive interaction for photosynthesis, yield and nutrient utilization efficiencies.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- P and Ke0
- Outcome
- photosynthesis,yield and nutrient utilization efficienciese0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant positive interactive effect of P and K exists in the photosynthesis,yield and nutrient utilization efficiencies”
t0“watermelon”
Claim · model-written summary
Under low potassium rates, tested parameters rose over a range of P application.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- P application ratee0
- Outcome
- all the tested parameterse0
- Direction
- keepincreasinge0
- Qualifier
- Under low potassium ratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under low potassium rates,all the tested parameters keepincreasing within a certain range of P application rate”
t0“watermelon”
Claim · model-written summary
At high potassium, individual P application outperformed individual K application as P rate increased.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- individual P applicatione0
- Outcome
- better effectse0
- Direction
- bettere0
- Comparator
- individual K applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high potassium levels,with the increase of phosphorus application rate,better effects are obtained with individual P application than individual K application”
t0“watermelon”
Claim · model-written summary
K260P170 achieved the highest photosynthetic rate, yield and nutrient utilization efficiency.
- Taxon
- watermelonCitrullus lanatust0
- Treatment
- K260P170treatmente0
- Outcome
- photosynthetic rate,yield and nutrient utilization efficiencye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest photosynthetic rate,yield and nutrient utilization efficiency were achieved with K260P170treatment”
t0“watermelon”
Claim · model-written summary
The authors recommend P2O5 170 kg/ha and K2O 260 kg/ha with N 200 kg/ha, a 1:0.85:1.3 ratio.
- Taxon
- watermelonCitrullus lanatuse0
- Outcome
- optimum fertilizer application ratese0
- Value
- 1 ∶ 0. 85 ∶ 1. 3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the optimum fertilizer application rates were P2O5170 kg/ha and K2O 260 kg/ha at the base of applying N 200 kg/ha,hence,the most suitable ratio of N ∶ P2O5∶ K2O is 1 ∶ 0. 85 ∶ 1. 3 for good yield and quality of watermelon”
The same questions in other papers
phosphorus · quality: general · Citrullus lanatus (watermelon)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →potassium · quality: general · Citrullus lanatus (watermelon)Results agree
2 papers in the same direction as this paper
- positive
- 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.