Abstract
Abstract Phosphorus (P) deficiency is one of the most yield‐limiting factors in lowland acid soils of Brazil. A field experiment was conducted during two consecutive years to determine dry‐matter and grain yield, nutrient uptake, and P‐use efficiency of lowland rice (Oryza sativa L.) grown on an acidic Inceptisol. Phosphorus rates used in the experiment were 0, 131, 262, 393, 524, and 655 kg P ha−1 applied as broadcast through termophosphate yoorin. Dry‐matter yield of shoot and grain yield were significantly (P<0.01) and quadratically increased with P fertilization. Concentrations (content per unit dry‐weight leaves) of nitrogen (N), P, and magnesium (Mg) were significantly increased in a quadratic fashion with the increasing P rates. However, concentrations of potassium (K), calcium (Ca), zinc (Zn), copper (Cu), and iron (Fe) were not influenced significantly with P fertilization, and Mn concentration was significantly decreased with increasing P rates. Phosphorus use efficiencies (agronomic, physiological, agrophysiological, recovery, and utilization) were decreased with increasing P rates. However, magnitude of decrease varied from efficiency to efficiency.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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 8
Claim · model-written summary
Phosphorus fertilization significantly increased rice shoot dry-matter yield in a quadratic fashion.
- Taxon
- Lowland Ricet0
- Treatment
- P fertilizatione0
- Outcome
- Dry‐matter yield of shoote0
- Direction
- increasede0
- Qualifier
- quadraticallye0
Not reportedComparator
Verbatim
e0“Dry‐matter yield of shoot and grain yield were significantly (P<0.01) and quadratically increased with P fertilization.”
t0“Lowland Rice”
Claim · model-written summary
Phosphorus fertilization significantly increased rice grain yield in a quadratic fashion.
Not reportedComparator
Verbatim
e0“Dry‐matter yield of shoot and grain yield were significantly (P<0.01) and quadratically increased with P fertilization.”
t0“Lowland Rice”
Claim · model-written summary
Increasing phosphorus rates significantly increased leaf nitrogen, phosphorus and magnesium concentrations in a quadratic fashion.
- Taxon
- Lowland Ricet0
- Treatment
- increasing P ratese0
- Outcome
- Concentrations (content per unit dry‐weight leaves) of nitrogen (N), P, and magnesium (Mg)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Concentrations (content per unit dry‐weight leaves) of nitrogen (N), P, and magnesium (Mg) were significantly increased in a quadratic fashion with the increasing P rates.”
t0“Lowland Rice”
Claim · model-written summary
Phosphorus fertilization did not significantly influence leaf potassium, calcium or zinc concentrations.
- Taxon
- Lowland Ricet0
- Treatment
- P fertilizatione0
- Outcome
- concentrations of potassium (K), calcium (Ca), zinc (Zn)e0
Not reportedComparatorDirection
Verbatim
e0“concentrations of potassium (K), calcium (Ca), zinc (Zn), copper (Cu), and iron (Fe) were not influenced significantly with P fertilization”
t0“Lowland Rice”
Claim · model-written summary
Phosphorus fertilization did not significantly influence leaf copper or iron concentrations.
Not reportedComparatorDirection
Verbatim
e0“concentrations of potassium (K), calcium (Ca), zinc (Zn), copper (Cu), and iron (Fe) were not influenced significantly with P fertilization”
t0“Lowland Rice”
Claim · model-written summary
Leaf manganese concentration significantly decreased with increasing phosphorus rates.
Not reportedComparator
Verbatim
e0“Mn concentration was significantly decreased with increasing P rates.”
t0“Lowland Rice”
Claim · model-written summary
Agronomic, physiological and agrophysiological phosphorus use efficiencies decreased with increasing phosphorus rates.
- Taxon
- Lowland Ricet0
- Treatment
- increasing P ratese0
- Outcome
- Phosphorus use efficiencies (agronomic, physiological, agrophysiologicale0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Phosphorus use efficiencies (agronomic, physiological, agrophysiological, recovery, and utilization) were decreased with increasing P rates.”
t0“Lowland Rice”
Claim · model-written summary
Recovery and utilization phosphorus use efficiencies decreased with increasing phosphorus rates.
- Taxon
- Lowland Ricet0
- Treatment
- increasing P ratese0
- Outcome
- recovery, and utilizatione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Phosphorus use efficiencies (agronomic, physiological, agrophysiological, recovery, and utilization) were decreased with increasing P rates.”
t0“Lowland Rice”
The same questions in other papers
phosphorus · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 17 in the opposite direction
- negative
- negative
- positive
18 papers more in this group
See all 22 papers →phosphorus · growth · Oryza sativa (rice)Positive and negative results
132 papers in the same direction as this paper · 32 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
162 papers more in this group
See all 166 papers →fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- positive
- positive
- no effect
3,451 papers more in this group
See all 3,455 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.