Abstract
The study focused on improving phosphorus (P) fertilizer recommendation in rainfed lowland rice soils in Togo. Phosphorus adsorption was conducted on four soils to determine their P adsorption characteristics and standard phosphorus requirement (SPR). The adsorption maximum ranged from 143 to 200 mg P/kg. The amount of P adsorbed range from 62.70 to 74.85 mg P/kg. Greenhouse experiment was conducted to determine rice response to phosphorus rates based on the SPR values, and to assess rice P uptake and use efficiency. Five phosphorus rates, Control: 0 mg P kg−1, P recommended rate (RR): 5 mg P kg−1, 4 × RR: 20 mg P kg−1, 50% SPR and 100% SPR were used. Results indicated no significant difference between the Control treatment and the P recommended rate (RR), and between the 50% SPR and the 100% SPR with reference to shoot dry matter yield. P uptake and P use efficiency were significantly and positively influenced by the various P fertilizer rates. From the study, the blanket P recommended rate is inappropriate, however, site-specific P fertilizer rate of 50% SPR may be recommended to improve rainfed lowland rice yields in Togo.
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Claims 7
Claim · model-written summary
No significant difference in shoot dry matter yield between the control and the P recommended rate.
- Taxon
- rice
Oryza sativat0 - Treatment
- P recommended rate (RR)e1
- Outcome
- shoot dry matter yielde1
- Direction
- no_changeinferrede1
- Comparator
- Control treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“Results indicated no significant difference between the Control treatment and the P recommended rate (RR), and between the 50% SPR and the 100% SPR with reference to shoot dry matter yield”
Claim · model-written summary
No significant difference in shoot dry matter yield between 50% SPR and 100% SPR.
- Taxon
- riceOryza sativat0
- Treatment
- 50% SPRe1
- Outcome
- shoot dry matter yielde1
- Direction
- no_changeinferrede1
- Comparator
- 100% SPRe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“Results indicated no significant difference between the Control treatment and the P recommended rate (RR), and between the 50% SPR and the 100% SPR with reference to shoot dry matter yield”
Claim · model-written summary
P uptake and P use efficiency were significantly and positively influenced by the P fertilizer rates.
- Taxon
- riceOryza sativat0
- Treatment
- various P fertilizer ratese1
- Outcome
- P uptake and P use efficiencye1
- Direction
- positively influencede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“P uptake and P use efficiency were significantly and positively influenced by the various P fertilizer rates”
Claim · model-written summary
The P adsorption maximum of the rice soils ranged from 143 to 200 mg P/kg.
- Taxon
- riceOryza sativat0
- Outcome
- adsorption maximume1
- Value
- 143 to 200 mg P/kge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“The adsorption maximum ranged from 143 to 200 mg P/kg”
Claim · model-written summary
The amount of P adsorbed by the rice soils ranged from 62.70 to 74.85 mg P/kg.
- Taxon
- riceOryza sativat0
- Outcome
- amount of P adsorbede1
- Value
- 62.70 to 74.85 mg P/kge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“The amount of P adsorbed range from 62.70 to 74.85 mg P/kg”
Claim · model-written summary
A site-specific P fertilizer rate of 50% SPR may be recommended to improve rainfed lowland rice yields in Togo.
- Taxon
- riceOryza sativat0
- Outcome
- site-specific P fertilizer rate of 50% SPRe1
- Qualifier
- may be recommended to improve rainfed lowland rice yields in Togoe1
- Setting
- Togoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“site-specific P fertilizer rate of 50% SPR may be recommended to improve rainfed lowland rice yields in Togo”
Claim · model-written summary
The blanket P recommended rate is inappropriate for rainfed lowland rice.
- Taxon
- riceOryza sativat0
- Outcome
- blanket P recommended ratee1
- Qualifier
- is inappropriatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice dry matter yield”
e1“the blanket P recommended rate is inappropriate”
The same questions in other papers
fertilization · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
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- no effect
- no effect
- negative
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See all 220 papers →phosphorus · yield · Oryza sativa (rice)Positive and negative results
55 papers in the same direction as this paper · 419 reporting no difference from an alternative
- positive
- positive
- positive
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See all 475 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.