Abstract
Abstract Soils from two sites, one high and one low in available phosphorus, were used in a greenhouse pot experiment with different rates of application of 32 P‐labelled superphosphate in combination with various dressings of ammonium sulphate. The crop was sampled at three stages of growth. The pattern of uptake was different in the two soils. In the low‐phosphate soil the percentage of fertiliser‐derived phosphorus in the plant fell steadily as the season progressed, but in the high‐phosphate soil there was apparently a renewed demand for phosphorus by the plant at the time of grain formation. This demand was met by fertiliser‐phosphorus. There was no indication that the extra uptake during this period enhanced grain formation. Grain yield was, in fact, reduced by the application of 160 Ib. of P 2 O 5 , per acre as superphosphate. The uptake of soil‐phosphorus was depressed so much by applications of superphosphate that the total uptake in treated pots from both soils was less than that in the control at maturity.
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Claims 7
Claim · model-written summary
The uptake pattern differed between soils.
- Taxon
- Oats
Avena sativat0 - Outcome
- pattern of uptakee0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“The pattern of uptake was different in the two soils.”
Claim · model-written summary
In low-phosphate soil, fertilizer-derived phosphorus in the plant fell over the season.
- Taxon
- OatsAvena sativat0
- Outcome
- percentage of fertiliser‐derived phosphorus in the plante0
- Direction
- fell steadilye0
- Setting
- low‐phosphate soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“In the low‐phosphate soil the percentage of fertiliser‐derived phosphorus in the plant fell steadily as the season progressed”
Claim · model-written summary
In high-phosphate soil, demand for phosphorus renewed at grain formation and was met by fertilizer phosphorus.
- Taxon
- OatsAvena sativat0
- Organ / stage
- grain formatione0
- Outcome
- renewed demand for phosphoruse0
- Setting
- high‐phosphate soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“in the high‐phosphate soil there was apparently a renewed demand for phosphorus by the plant at the time of grain formation. This demand was met by fertiliser‐phosphorus”
Claim · model-written summary
Extra phosphorus uptake did not appear to enhance grain formation.
- Taxon
- OatsAvena sativat0
- Treatment
- extra uptakee0
- Outcome
- grain formatione0
- Direction
- no indicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“There was no indication that the extra uptake during this period enhanced grain formation”
Claim · model-written summary
Superphosphate at 160 Ib. P2O5 per acre reduced grain yield.
- Taxon
- OatsAvena sativat0
- Treatment
- application of 160 Ib. of P 2 O 5 , per acre as superphosphatee0
- Outcome
- Grain yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“Grain yield was, in fact, reduced by the application of 160 Ib. of P 2 O 5 , per acre as superphosphate”
Claim · model-written summary
Superphosphate depressed soil phosphorus uptake.
- Taxon
- OatsAvena sativat0
- Treatment
- applications of superphosphatee0
- Outcome
- uptake of soil‐phosphoruse0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“The uptake of soil‐phosphorus was depressed so much by applications of superphosphate”
Claim · model-written summary
At maturity, treated pots had less total phosphorus uptake than controls in both soils.
- Taxon
- OatsAvena sativat0
- Organ / stage
- maturitye0
- Treatment
- treated potse0
- Outcome
- total uptakee0
- Direction
- less thane0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Oats”
e0“the total uptake in treated pots from both soils was less than that in the control at maturity”
The same questions in other papers
phosphorus · yield · Avena sativa (oats)Results differ
3 papers in the same direction as this paper · 23 in the opposite direction
- no effect
- positive
- positive
23 papers more in this group
See all 27 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.