Abstract
The major plant nutrient magnesium (Mg) is involved in numerous physiological processes and its deficiency can severely reduce the yield and quality of crops. Since Mg availability in soil and uptake into the plant is often limited by unfavorable soil or climatic conditions, application of Mg onto leaves, the site with highest physiological Mg demand, might be a reasonable alternative fertilization strategy. This study aimed to investigate, if MgSO4 leaf-application in practically relevant amounts can efficiently alleviate the effects of Mg starvation in maize, namely reduced photosynthesis capacity, disturbed ion homeostasis and growth depression. Results clearly demonstrated that Mg deficiency could be mitigated by MgSO4 leaf-application as efficiently as by resupply of MgSO4 via the roots in vegetative maize plants. Significant increases in SPAD values and net rate of CO2-assimilation as well as enhanced shoot biomass have been achieved. Ion analysis furthermore revealed an improvement of the nutrient status of Mg-deficient plants with regard to [Mg], [K], and [Mn] in distinct organs, thereby reducing the risk of Mn-toxicity at the rootside, which often occurs together with Mg deficiency on acid soils. In conclusion, foliar fertilization with Mg proved to be an efficient strategy to adequately supply maize plants with Mg and might hence be of practical relevance to correct nutrient deficiencies during the growing season.
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Claims 6
Claim · model-written summary
Foliar MgSO4 mitigated magnesium deficiency as efficiently as root resupply.
- Organ / stage
- vegetativee0
- Treatment
- MgSO4 leaf-applicatione0
- Outcome
- Mg deficiencye0
- Direction
- mitigatede0
- Comparator
- resupply of MgSO4 via the rootse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mg deficiency could be mitigated by MgSO4 leaf-application as efficiently as by resupply of MgSO4 via the roots in vegetative maize plants”
Claim · model-written summary
Foliar MgSO4 increased SPAD values and net CO2 assimilation in magnesium deficient maize.
- Treatment
- MgSO4 leaf-applicatione1
- Outcome
- SPAD values and net rate of CO2-assimilatione0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant increases in SPAD values and net rate of CO2-assimilation as well as enhanced shoot biomass have been achieved.”
e1“MgSO4 leaf-application in practically relevant amounts”
t0“maize (Zea mays L.)”
Claim · model-written summary
Foliar MgSO4 enhanced shoot biomass in magnesium deficient maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced shoot biomass”
e1“MgSO4 leaf-application in practically relevant amounts”
t0“maize (Zea mays L.)”
Claim · model-written summary
Foliar MgSO4 improved Mg, K and Mn nutrient status in distinct organs of magnesium deficient maize.
- Organ / stage
- distinct organse0
- Treatment
- MgSO4 leaf-applicatione1
- Outcome
- nutrient status of Mg-deficient plants with regard to [Mg], [K], and [Mn]e0
- Direction
- improvemente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an improvement of the nutrient status of Mg-deficient plants with regard to [Mg], [K], and [Mn] in distinct organs”
e1“MgSO4 leaf-application in practically relevant amounts”
t0“maize (Zea mays L.)”
Claim · model-written summary
The improved nutrient status reduced the risk of manganese toxicity at the roots.
- Outcome
- risk of Mn-toxicity at the rootsidee0
- Direction
- reducinge0
- Qualifier
- improvement of the nutrient statuse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby reducing the risk of Mn-toxicity at the rootside”
e1“an improvement of the nutrient status of Mg-deficient plants”
t0“maize (Zea mays L.)”
Claim · model-written summary
The authors conclude foliar Mg fertilization can correct maize nutrient deficiencies during the growing season.
- Outcome
- correct nutrient deficiencies during the growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar fertilization with Mg proved to be an efficient strategy to adequately supply maize plants with Mg and might hence be of practical relevance to correct nutrient deficiencies during the growing season”
The same questions in other papers
magnesium sulfate · growth · Zea mays (maize)Positive and negative results
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- negative
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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.