Paper · 1997 · Murdoch Research Repository (Murdoch University)

Effect of nursery applications of N and P on rice (Oryza sativa) yield

Clóvis Orlando Da Ros; R.W. Bell; PJ White

7
claims
11
verbatim quotes
0
citations
1
research areas
✓
Open access

Abstract

In two glasshouse experiments, one with N and the other with P, plants were treated with combinations of four and two levels of N or P in the nursery and after transplanting respectively. The relative responses of rice were determined from matter, nutrient uptake and grin yield. After 21 days in the nursery, rice seedlings produced 50% and 100 % more shoot dry matter when fertilized with N and P respectively than when unfertilized. In the nursery, root dry matter was also increased by N, but not by P. After transplanting, the effects of the nursery N and P persisted, leading to increases of up to 10 and 15% in grain yield, respectively. Nitrogen and phosphorus applied in the nursery shoot dry weight at 30 days after transplanting, both with and without added N or P at transplanting. The results suggested that fertilizing the nursery bed would have significant effects on grain yield and that for rice farming in Cambodia, appropriate strategies for the fertilizer management of the nursery as well as the mainfield are required in order to improve rice yield.

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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 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nursery N increased rice seedling shoot dry matter by 50% at 21 days relative to unfertilized seedlings.

Organ / stage
seedlingse0
Treatment
Ne0
Outcome
shoot dry mattere0
Direction
moree0
Value
50%e0
Comparator
unfertilizede0

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

“After 21 days in the nursery, rice seedlings produced 50% and 100 % more shoot dry matter when fertilized with N and P respectively than when unfertilized”

✓ located verbatim in the source · abstract, characters 280–434 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nursery P increased rice seedling shoot dry matter by 100% at 21 days relative to unfertilized seedlings.

Organ / stage
seedlingse0
Treatment
Pe0
Outcome
shoot dry mattere0
Direction
moree0
Value
100 %e0
Comparator
unfertilizede0

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

“After 21 days in the nursery, rice seedlings produced 50% and 100 % more shoot dry matter when fertilized with N and P respectively than when unfertilized”

✓ located verbatim in the source · abstract, characters 280–434 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nursery N increased rice root dry matter.

Treatment
Ne0
Outcome
root dry mattere0
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

“In the nursery, root dry matter was also increased by N, but not by P”

✓ located verbatim in the source · abstract, characters 436–505 · show in text ↑
t0

“rice (Oryza sativa)”

✓ located verbatim in the source · title, characters 45–64 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Nursery P did not increase rice root dry matter.

Treatment
Pe0
Outcome
root dry mattere0
Direction
note0

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

“In the nursery, root dry matter was also increased by N, but not by P”

✓ located verbatim in the source · abstract, characters 436–505 · show in text ↑
t0

“rice (Oryza sativa)”

✓ located verbatim in the source · title, characters 45–64 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nursery N increased later rice grain yield by up to 10%.

Treatment
nursery Ne0
Outcome
grain yielde0
Direction
increasese0
Value
10e0
Qualifier
up toe0

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

“After transplanting, the effects of the nursery N and P persisted, leading to increases of up to 10 and 15% in grain yield, respectively”

✓ located verbatim in the source · abstract, characters 507–643 · show in text ↑
t0

“rice (Oryza sativa)”

✓ located verbatim in the source · title, characters 45–64 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nursery P increased later rice grain yield by up to 15%.

Treatment
Pe0
Outcome
grain yielde0
Direction
increasese0
Value
15%e0
Qualifier
up toe0

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

“After transplanting, the effects of the nursery N and P persisted, leading to increases of up to 10 and 15% in grain yield, respectively”

✓ located verbatim in the source · abstract, characters 507–643 · show in text ↑
t0

“rice (Oryza sativa)”

✓ located verbatim in the source · title, characters 45–64 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend managing fertilizer in both nursery and main field to improve rice yield in Cambodia.

Outcome
appropriate strategies for the fertilizer management of the nursery as well as the mainfielde0
Setting
Cambodiae0

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 rice farming in Cambodia, appropriate strategies for the fertilizer management of the nursery as well as the mainfield are required in order to improve rice yield”

✓ located verbatim in the source · abstract, characters 904–1070 · show in text ↑

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

166 papers: 133 positive, 33 negative or no effect

132 papers in the same direction as this paper · 32 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

162 papers more in this group

See all 166 papers →

phosphorus · yield · Oryza sativa (rice)Positive and negative results

475 papers: 419 positive, 56 negative or no effect

418 papers in the same direction as this paper · 46 in the opposite direction · 10 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

471 papers more in this group

See all 475 papers →

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

See all 511 papers →

transplanting · yield · Oryza sativa (rice)Positive and negative results

1,078 papers: 922 positive, 156 negative or no effect

921 papers in the same direction as this paper · 132 in the opposite direction · 24 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. no effect

1,074 papers more in this group

See all 1,078 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.