Abstract
In order to verify the optimum nitrogen application rate and planting density for higher yield、quality and nitrogen use efficiency of watermelon in gravel mulched field,and to provide basis for the development of rational cultivation measures,Longkang 9 representing late variety was used in this study.Under field condition,three planting densities(9525,12120,16680 plant/ha) and four nitrogen rates(0,100,200,300 kg/ha) were applied to study the interaction between nitrogen and density on yield、quality and nitrogen use efficiency of watermelon in Gravel-mulched field.The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon,but the interactive effect between them was not significant.Compared with the nitrogen rates planting density is a key factor for increasing the yield,with increased planting density,the yield of watermelon has improved,the yield of high density increased by 23.46% and 45.58% respectively compared to middle density and low density.The nitrogen rate have significant regulating effect for quality of watermelon,when nitrogen application rate increased from 0 up to 200 kg/ha,the yield and quality were also increased with nitrogen application rate,and lowered while continue to increase amount of nitrogen fertilizer,the N200 treatment increased sugar content of watermelon by 1.43% and 1.92%,and of the Vc content by 13.09% and 8.42% compared to N0 and N300.The partial factor productivity and recovery efficiency of applied N were improved for increasing yield of watermelon.In this study,taking yield、quality and nitrogen use efficiency into consideration,the appropriate plant density and nitrogen rate of watermelon in sandy field are 16680 plant/ha and N 200 kg/ha respectively,the yield、sugar content and nitrogen recovery efficiency of which were 61754 kg/ha,10.59% and 22.29%.
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Claims 16
Claim · model-written summary
Planting density has a significant effect on watermelon yield and quality
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- planting densitye0
- Outcome
- yield and qualitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
Claim · model-written summary
Nitrogen rate has a significant regulating effect on watermelon quality
- Taxon
- watermelonCitrullus lanatuse3
- Treatment
- nitrogen ratee3
- Outcome
- qualitye3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The nitrogen rate have significant regulating effect for quality of watermelon”
Claim · model-written summary
The interaction between planting density and nitrogen rate has no significant effect on watermelon yield and quality
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- planting density and nitrogen ratee0
- Outcome
- the interactive effect between theme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
Claim · model-written summary
Raising nitrogen application from 0 to 200 kg/ha increased watermelon yield and quality
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- nitrogen application rate increased from 0 up to 200 kg/hae2
- Outcome
- yield and qualitye2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
e2“when nitrogen application rate increased from 0 up to 200 kg/ha, the yield and quality were also increased with nitrogen application rate, and lowered while continue to increase amount of nitrogen fertilizer”
Claim · model-written summary
Nitrogen application above 200 kg/ha lowered watermelon yield and quality
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- continue to increase amount of nitrogen fertilizere2
- Outcome
- yield and qualitye2
- Direction
- lowerede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
e2“when nitrogen application rate increased from 0 up to 200 kg/ha, the yield and quality were also increased with nitrogen application rate, and lowered while continue to increase amount of nitrogen fertilizer”
Claim · model-written summary
The N200 treatment increased watermelon sugar content by 1.43% compared with N0
- Taxon
- watermelonCitrullus lanatuse5
- Treatment
- N200 treatmente5
- Outcome
- sugar contente5
- Direction
- increasede5
- Value
- 1.43%e5
- Comparator
- N0e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the N200 treatment increased sugar content of watermelon by 1.43% and 1.92%, and of the Vc content by 13.09% and 8.42% compared to N0 and N300”
Claim · model-written summary
The N200 treatment increased watermelon sugar content by 1.92% compared with N300
- Taxon
- watermelonCitrullus lanatuse5
- Treatment
- N200 treatmente5
- Outcome
- sugar contente5
- Direction
- increasede5
- Value
- 1.92%e5
- Comparator
- N300e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the N200 treatment increased sugar content of watermelon by 1.43% and 1.92%, and of the Vc content by 13.09% and 8.42% compared to N0 and N300”
Claim · model-written summary
The N200 treatment increased watermelon Vc content by 13.09% compared with N0
- Taxon
- watermelonCitrullus lanatuse5
- Treatment
- N200 treatmente5
- Outcome
- Vc contente5
- Direction
- increasede5
- Value
- 13.09%e5
- Comparator
- N0e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the N200 treatment increased sugar content of watermelon by 1.43% and 1.92%, and of the Vc content by 13.09% and 8.42% compared to N0 and N300”
Claim · model-written summary
The N200 treatment increased watermelon Vc content by 8.42% compared with N300
- Taxon
- watermelonCitrullus lanatuse5
- Treatment
- N200 treatmente5
- Outcome
- Vc contente5
- Direction
- increasede5
- Value
- 8.42%e5
- Comparator
- N300e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“the N200 treatment increased sugar content of watermelon by 1.43% and 1.92%, and of the Vc content by 13.09% and 8.42% compared to N0 and N300”
Claim · model-written summary
High planting density increased watermelon yield by 23.46% compared with middle density
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- high densitye1
- Outcome
- yielde1
- Direction
- increasede1
- Value
- 23.46%e1
- Comparator
- middle densitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
e1“the yield of high density increased by 23.46% and 45.58% respectively compared to middle density and low density”
Claim · model-written summary
High planting density increased watermelon yield by 45.58% compared with low density
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- high densitye1
- Outcome
- yielde1
- Direction
- increasede1
- Value
- 45.58%e1
- Comparator
- low densitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results show that planting density and nitrogen rate have significant effects on yield and quality of watermelon, but the interactive effect between them was not significant”
e1“the yield of high density increased by 23.46% and 45.58% respectively compared to middle density and low density”
Claim · model-written summary
Applied nitrogen improved the partial factor productivity and recovery efficiency of watermelon
- Taxon
- watermelonCitrullus lanatuse4
- Treatment
- applied Ne4
- Outcome
- partial factor productivity and recovery efficiencye4
- Direction
- improvede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The partial factor productivity and recovery efficiency of applied N were improved for increasing yield of watermelon”
Claim · model-written summary
An appropriate plant density and nitrogen rate for watermelon in sandy field are 16680 plant/ha and N 200 kg/ha
- Taxon
- watermelonCitrullus lanatuse6
- Outcome
- appropriate plant density and nitrogen ratee6
- Setting
- sandy fielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the appropriate plant density and nitrogen rate of watermelon in sandy field are 16680 plant/ha and N 200 kg/ha respectively”
Claim · model-written summary
Under the appropriate plant density and nitrogen rate, watermelon yield was 61754 kg/ha
- Taxon
- watermelonCitrullus lanatuse6
- Outcome
- yielde7
- Value
- 61754 kg/hae7
- Qualifier
- appropriate plant density and nitrogen ratee6
- Setting
- sandy fielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the appropriate plant density and nitrogen rate of watermelon in sandy field are 16680 plant/ha and N 200 kg/ha respectively”
e7“the yield、sugar content and nitrogen recovery efficiency of which were 61754 kg/ha,10.59% and 22.29%”
Claim · model-written summary
Under the appropriate plant density and nitrogen rate, watermelon sugar content was 10.59%
- Taxon
- watermelonCitrullus lanatuse6
- Outcome
- sugar contente7
- Value
- 10.59%e7
- Qualifier
- appropriate plant density and nitrogen ratee6
- Setting
- sandy fielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the appropriate plant density and nitrogen rate of watermelon in sandy field are 16680 plant/ha and N 200 kg/ha respectively”
e7“the yield、sugar content and nitrogen recovery efficiency of which were 61754 kg/ha,10.59% and 22.29%”
Claim · model-written summary
Under the appropriate plant density and nitrogen rate, nitrogen recovery efficiency of watermelon was 22.29%
- Taxon
- watermelonCitrullus lanatuse6
- Outcome
- nitrogen recovery efficiencye7
- Value
- 22.29%e7
- Qualifier
- appropriate plant density and nitrogen ratee6
- Setting
- sandy fielde6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“the appropriate plant density and nitrogen rate of watermelon in sandy field are 16680 plant/ha and N 200 kg/ha respectively”
e7“the yield、sugar content and nitrogen recovery efficiency of which were 61754 kg/ha,10.59% and 22.29%”
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