Abstract
Abstract In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied. Increasing the P supply caused increasing P concentrations in roots and tops. When P was withheld for short periods after transplanting the seedlings, some deficiency symptoms appeared, which disappeared when P was reapplied at a later stage. Withholding P for only one week caused a restriction in yield which was aggrevated when P was withhold for longer periods. The P content of plants recovered when it was reapplied after a period of withholding P and even became higher than the control which received P throughout the growing period. It was concluded that the P uptake rate was higher when P was applied after a period without P. This higher rate of P uptake and restricted growth caused P to concentrate in the top growth. This could be caused by any factor such as a cold spell, which restricts P uptake, even for a short period. This many have important consequences when attempting to use P analyses for interpreting P availability and the P nutrient status of plants.
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Claims 9
Claim · model-written summary
Increasing P supply increased P concentrations in wheat roots and tops.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Increasing the P supplye1
- Outcome
- P concentrations in roots and topse1
- Direction
- increasinge1
- Setting
- solution culturee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e1“Increasing the P supply caused increasing P concentrations in roots and tops”
Claim · model-written summary
Withholding P for short periods after transplanting caused some deficiency symptoms in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P was withheld for short periods after transplantinge2
- Outcome
- deficiency symptomse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e2“When P was withheld for short periods after transplanting the seedlings, some deficiency symptoms appeared, which disappeared when P was reapplied at a later stage”
Claim · model-written summary
Deficiency symptoms disappeared when P was reapplied at a later stage.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P was reapplied at a later stagee2
- Outcome
- deficiency symptomse2
- Qualifier
- disappearede2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e2“When P was withheld for short periods after transplanting the seedlings, some deficiency symptoms appeared, which disappeared when P was reapplied at a later stage”
Claim · model-written summary
Withholding P for one week restricted wheat yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Withholding P for only one weeke3
- Outcome
- yielde3
- Direction
- restrictione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e3“Withholding P for only one week caused a restriction in yield which was aggrevated when P was withhold for longer periods”
Claim · model-written summary
Withholding P for longer periods aggravated the yield restriction in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P was withhold for longer periodse3
- Outcome
- yielde3
- Direction
- aggrevatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e3“Withholding P for only one week caused a restriction in yield which was aggrevated when P was withhold for longer periods”
Claim · model-written summary
P reapplied after withholding raised P content of wheat plants above the control that received P throughout.
- Taxon
- wheatTriticum aestivume0
- Treatment
- reapplied after a period of withholding Pe4
- Outcome
- P content of plantse4
- Direction
- became highere4
- Comparator
- the control which received P throughout the growing periode4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e4“The P content of plants recovered when it was reapplied after a period of withholding P and even became higher than the control which received P throughout the growing period”
Claim · model-written summary
P uptake rate was higher when P was applied after a period without P.
- Taxon
- wheatTriticum aestivume0
- Treatment
- P was applied after a period without Pe5
- Outcome
- P uptake ratee5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e5“It was concluded that the P uptake rate was higher when P was applied after a period without P”
Claim · model-written summary
Higher P uptake rate and restricted growth caused P to concentrate in the wheat top growth.
- Taxon
- wheatTriticum aestivume0
- Outcome
- concentrate in the top growthe6
- Qualifier
- higher rate of P uptake and restricted growthe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e6“This higher rate of P uptake and restricted growth caused P to concentrate in the top growth”
Claim · model-written summary
Foliar P analyses may have important consequences for interpreting P availability and P nutrient status of wheat.
- Taxon
- wheatTriticum aestivume0
- Outcome
- interpreting P availability and the P nutrient status of plantse7
- Qualifier
- important consequencese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a solution culture experiment with wheat, the influence of withholding P at early growing stages as well as varying the P supply on the growth and P content were studied”
e7“This many have important consequences when attempting to use P analyses for interpreting P availability and the P nutrient status of plants”
The same questions in other papers
transplanting · disease · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
3 papers more in this group
See all 7 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.