Paper · 1978 · Experimental Agriculture

P and K Nutrition of Rice (Oryza sativa) in the Sudan Kenana

Osman A. A. Ageeb; Yousif H. Yousif

7
claims
11
verbatim quotes
1
citations
2
research areas
—
Not open access

Abstract

SUMMARY Field and plant tissue tests under Sudan Kenana conditions revealed that rice does not respond to K but response to P was very clear, both from visual symptoms, tissue analyses and in yields. As early as the seedling stage, a concentration of leaf blade-P of about 1300 ppm is considered optimum. Yield, and level of soil application, corresponding to this value were 5000 kg/ha paddy rice and 42·8 kg/ha P 2 O 5 respectively. A low yield (2400 kg/ha) was obtained from plants receiving no P 2 O 5 . Phosphate application reduced the grain protein.

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Claims 7

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Rice did not respond to potassium.

Treatment
Ke0
Outcome
responde0
Direction
does not responde0

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

“rice does not respond to K”

✓ located verbatim in the source · abstract, characters 81–107 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Rice showed clear response to phosphorus in visual symptoms, tissue analyses and yield.

Treatment
Pe0
Outcome
visual symptoms, tissue analyses and in yieldse0

Not reportedComparatorDirection

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

“response to P was very clear, both from visual symptoms, tissue analyses and in yields”

✓ located verbatim in the source · abstract, characters 112–198 · show in text ↑
e1

“rice does not respond to K”

✓ located verbatim in the source · abstract, characters 81–107 · show in text ↑
Observationauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

About 1300 ppm leaf blade phosphorus was considered optimal at seedling stage.

Organ / stage
seedling stagee0
Outcome
concentration of leaf blade-Pe0
Direction
optimume0
Value
about 1300 ppme0

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

“As early as the seedling stage, a concentration of leaf blade-P of about 1300 ppm is considered optimum.”

✓ located verbatim in the source · abstract, characters 200–304 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 21–25 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

The optimum concentration corresponded to 5000 kg/ha paddy rice yield.

Outcome
Yielde0
Value
5000 kg/hae0
Qualifier
corresponding to this valuee0

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

“Yield, and level of soil application, corresponding to this value were 5000 kg/ha paddy rice and 42·8 kg/ha P 2 O 5 respectively.”

✓ located verbatim in the source · abstract, characters 305–434 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The optimum concentration corresponded to 42·8 kg/ha P 2 O 5 application.

Outcome
level of soil applicatione0
Value
42·8 kg/ha P 2 O 5e0

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

“level of soil application, corresponding to this value were 5000 kg/ha paddy rice and 42·8 kg/ha P 2 O 5 respectively.”

✓ located verbatim in the source · abstract, characters 316–434 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Without P 2 O 5, yield was 2400 kg/ha.

Treatment
no P 2 O 5e0
Outcome
yielde0
Direction
lowe0
Value
2400 kg/hae0

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

“A low yield (2400 kg/ha) was obtained from plants receiving no P 2 O 5 .”

✓ located verbatim in the source · abstract, characters 435–507 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 21–25 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Phosphate application reduced grain protein.

Treatment
Phosphate applicatione0
Outcome
grain proteine0
Direction
reducede0

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

“Phosphate application reduced the grain protein.”

✓ located verbatim in the source · abstract, characters 508–556 · show in text ↑
t0

“Rice”

✓ located verbatim in the source · title, characters 21–25 · show in text ↑

phosphorus · quality: protein · Oryza sativa (rice)Results differ

12 papers: 9 positive, 3 negative or no effect

2 papers in the same direction as this paper · 9 in the opposite direction

  1. positive
  2. positive
  3. positive

8 papers more in this group

See all 12 papers →

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

15 papers: 12 positive, 3 negative or no effect

11 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. negative
  3. negative

11 papers more in this group

See all 15 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.