Paper · 2007

Nitrogen and potassium application on hybrid rice

Cheng Xue-hua

13
claims
25
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

Effects of nitrogen(N) and potassium(K) fertilizer application rates on the growth,development and yield of the hybrid rice in the field were observed.It was found that the tillering number,as well as the area and dry weight of the leaves increased with the increased rate of N and K fertilizer application.The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.The hybrid rice was sensitive to N fertilizer.Therefore,the application rate of N is recommended for getting the highest grain yield,but K application for a balanced economic return.For every 100 kg grain in high yield cultivation,the optimum rates of application are 1.8 kg N and 1.6 kg K_2O.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher.

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 13

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

tillering number increased with N and K fertilizer rate.

Taxon
hybrid riceOryza sativat0
Treatment
increased rate of N and K fertilizer applicatione0
Outcome
tillering numbere0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“It was found that the tillering number,as well as the area and dry weight of the leaves increased with the increased rate of N and K fertilizer application.”

✓ located verbatim in the source · abstract, characters 151–307 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

area increased with N and K fertilizer rate.

Taxon
hybrid riceOryza sativat0
Treatment
increased rate of N and K fertilizer applicatione0
Outcome
areae0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“It was found that the tillering number,as well as the area and dry weight of the leaves increased with the increased rate of N and K fertilizer application.”

✓ located verbatim in the source · abstract, characters 151–307 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

dry weight of the leaves increased with N and K fertilizer rate.

Taxon
hybrid riceOryza sativat0
Treatment
increased rate of N and K fertilizer applicatione0
Outcome
dry weight of the leavese0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“It was found that the tillering number,as well as the area and dry weight of the leaves increased with the increased rate of N and K fertilizer application.”

✓ located verbatim in the source · abstract, characters 151–307 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Fertilizer application rate had a parabolic association with crop growth rate.

Taxon
hybrid riceOryza sativat0
Treatment
fertilizer application ratese0
Outcome
crop growth ratee0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.”

✓ located verbatim in the source · abstract, characters 307–487 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Fertilizer application rate had a parabolic association with dry weight of stem and sheath.

Taxon
hybrid riceOryza sativat0
Treatment
fertilizer application ratese0
Outcome
dry weight of stem and sheathe0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.”

✓ located verbatim in the source · abstract, characters 307–487 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Fertilizer application rate had a parabolic association with spike dry weight.

Taxon
hybrid riceOryza sativat0
Treatment
fertilizer application ratese0
Outcome
spike dry weighte0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.”

✓ located verbatim in the source · abstract, characters 307–487 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Fertilizer application rate had a parabolic association with total dry matter weight.

Taxon
hybrid riceOryza sativat0
Treatment
fertilizer application ratese0
Outcome
total dry matter weighte0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.”

✓ located verbatim in the source · abstract, characters 307–487 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Fertilizer application rate had a parabolic association with grain yield.

Taxon
hybrid riceOryza sativat0
Treatment
fertilizer application ratese0
Outcome
grain yielde0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The fertilizer application rates exhibited a parabolic correlation with the crop growth rate,dry weight of stem and sheath,spike dry weight,total dry matter weight and grain yield.”

✓ located verbatim in the source · abstract, characters 307–487 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Hybrid rice was sensitive to N fertilizer.

Taxon
hybrid riceOryza sativae0
Outcome
sensitive to N fertilizere0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The hybrid rice was sensitive to N fertilizer.”

✓ located verbatim in the source · abstract, characters 487–533 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend N application for maximum grain yield.

Taxon
hybrid riceOryza sativat0
Outcome
application rate of N is recommended for getting the highest grain yielde0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Therefore,the application rate of N is recommended for getting the highest grain yield,but K application for a balanced economic return.”

✓ located verbatim in the source · abstract, characters 533–669 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend K application for balanced economic return.

Taxon
hybrid riceOryza sativat0
Outcome
K application for a balanced economic returne0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“Therefore,the application rate of N is recommended for getting the highest grain yield,but K application for a balanced economic return.”

✓ located verbatim in the source · abstract, characters 533–669 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The optimum N application rate in high yield cultivation was 1.8 kg per 100 kg grain.

Taxon
hybrid riceOryza sativat0
Outcome
optimum rates of applicatione0
Value
1.8 kg Ne0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“For every 100 kg grain in high yield cultivation,the optimum rates of application are 1.8 kg N and 1.6 kg K_2O.”

✓ located verbatim in the source · abstract, characters 669–780 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The optimum K2O application rate in high yield cultivation was 1.6 kg per 100 kg grain.

Taxon
hybrid riceOryza sativat0
Outcome
optimum rates of applicatione0
Value
1.6 kg K_2Oe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“For every 100 kg grain in high yield cultivation,the optimum rates of application are 1.8 kg N and 1.6 kg K_2O.”

✓ located verbatim in the source · abstract, characters 669–780 · show in text ↑
t0

“hybrid rice”

✓ located verbatim in the source · title, characters 38–49 · show in text ↑

potassium · growth · Oryza sativa (rice)Positive and negative results

95 papers: 81 positive, 14 negative or no effect

80 papers in the same direction as this paper · 14 in the opposite direction

  1. negative
  2. no effect
  3. negative

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nitrogen · growth · Oryza sativa (rice)Positive and negative results

511 papers: 402 positive, 109 negative or no effect

401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

507 papers more in this group

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fertilization · growth · Oryza sativa (rice)Positive and negative results

759 papers: 670 positive, 89 negative or no effect

669 papers in the same direction as this paper · 81 in the opposite direction · 8 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

755 papers more in this group

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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.