Abstract
This research was conducted to determine the interactive effect of different potassium (K) and iron (Fe) rates on the growth and nutrient uptake of maize. The work also investigated the effects of high amounts of K on Fe uptake and on the occurrence of Fe chlorosis. For this purpose, five K (1, 2, 4, 6 & 8 mM) and four Fe (30, 60, 90 & 120 μM) doses were applied to maize (Zea Mays L. cv. BSC 6661) plants in a re-circulated hydroponic system. Increasing K and Fe levels had positive effects on the dry weight of the maize leaves and roots. Total Fe concentrations and their uptake increased with the increasing levels of Fe and K, but decreased with the highest K dose. This response was similar to dry weight and the SPAD values with increasing Fe. We conclude that adequate K may also be required for the efficient use of Fe. However too high a concentration of K will cause competition with Fe. © 2010 Friends Science Publishers
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
Increasing potassium increased maize leaf and root dry weight.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing K and Fe levels had positive effects on the dry weight of the maize leaves and roots.”
Claim · model-written summary
Increasing iron increased maize leaf and root dry weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing K and Fe levels had positive effects on the dry weight of the maize leaves and roots.”
Claim · model-written summary
Higher iron levels increased total iron concentration and uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total Fe concentrations and their uptake increased with the increasing levels of Fe and K”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
Claim · model-written summary
Higher potassium levels increased total iron concentration and uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total Fe concentrations and their uptake increased with the increasing levels of Fe and K”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
Claim · model-written summary
The highest potassium dose reduced iron concentration and uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total Fe concentrations and their uptake increased with the increasing levels of Fe and K, but decreased with the highest K dose.”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
Claim · model-written summary
Increasing iron gave a similar response in dry weight and SPAD values.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This response was similar to dry weight and the SPAD values with increasing Fe.”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
Claim · model-written summary
The authors infer that adequate potassium is required for efficient iron use.
- Outcome
- adequate K may also be required for the efficient use of Fee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that adequate K may also be required for the efficient use of Fe.”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
Claim · model-written summary
The authors infer that excessive potassium competes with iron.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However too high a concentration of K will cause competition with Fe.”
e1“maize (Zea Mays L. cv. BSC 6661) plants”
The same questions in other papers
iron atom · physiology: pigments · Zea mays (maize)Results differ
13 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
15 papers more in this group
See all 19 papers →iron atom · growth · Zea mays (maize)Results differ
56 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
60 papers more in this group
See all 64 papers →iron atom · nutrient: content · Zea mays (maize)Positive and negative results
48 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
50 papers more in this group
See all 54 papers →potassium · nutrient: content · Zea mays (maize)Results differ
73 papers in the same direction as this paper · 22 in the opposite direction
- no effect
- no effect
- negative
92 papers more in this group
See all 96 papers →potassium · growth · Zea mays (maize)Results differ
98 papers in the same direction as this paper · 15 in the opposite direction
- no effect
- no effect
- negative
110 papers more in this group
See all 114 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.