Abstract
Proper crop nutrition is a key factor for achieving suitable crop yield, even under drought stress conditions. To evaluate the effects of soluble potassium sulfate fertilizer and iron chelate on corn (Zea mays L.) seed yield and its yield components under water deficite stress a split split plot experiment based on randomized complete block design with three replications was caried out in Shahryar, Tehran province, in 2014. The main plots were assigned to water deficit stress and normal irrigation and subplots to soluble potassium sulfate and chelated iron. Soluble potassium sulfate levels were 0, 25, 50 kg.ha-1 K2O and iron fertilizer sprayed as Fe-EDDHA. The results showed that interaction of potassium sulfate, iron fertilizer and water deficit stress at seed milky stage was significant (P> 0.05) as to total chlorophyll, plant dry weight, thousand seed weight and corn seed yield. The application of iron, potassium and water deficit stress had also a significant effect (P> 0.01) on biological yield and number of seeds per ear, but their interactions were not significant. Application of 25 kg.ha-1 of potassium sulfate and iron chelate as foliar spray increased seed yield from 5294 kg.ha-1 in control (without fertilizer application) to 6978 kg.ha-1 and seed yield, under water deficit stress at seed milky stage, increased from 3921 kg.ha-1 in control treatment to 4794 kg.ha-1. According to the results of this study, application of 25 kg.ha-1 of potassium sulfate along with the application of iron chelate, at pre-tasseling stage, may produce acceptable yield under water deficit stress condition.
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Claims 7
Claim · model-written summary
The interaction of potassium sulfate, iron fertilizer and water deficit stress at the seed milky stage was significant for total chlorophyll and plant dry weight in corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- potassium sulfate, iron fertilizer and water deficit stresse0
- Outcome
- total chlorophyll, plant dry weighte0
- Qualifier
- at seed milky stagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction of potassium sulfate, iron fertilizer and water deficit stress at seed milky stage was significant (P> 0.05) as to total chlorophyll, plant dry weight, thousand seed weight and corn seed yield”
Claim · model-written summary
The interaction of potassium sulfate, iron fertilizer and water deficit stress at the seed milky stage was significant for corn thousand seed weight and seed yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- potassium sulfate, iron fertilizer and water deficit stresse0
- Outcome
- thousand seed weight and corn seed yielde0
- Qualifier
- at seed milky stagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction of potassium sulfate, iron fertilizer and water deficit stress at seed milky stage was significant (P> 0.05) as to total chlorophyll, plant dry weight, thousand seed weight and corn seed yield”
Claim · model-written summary
Iron, potassium and water deficit stress each had a significant effect on biological yield and number of seeds per ear.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- application of iron, potassium and water deficit stresse0
- Outcome
- biological yield and number of seeds per eare0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of iron, potassium and water deficit stress had also a significant effect (P> 0.01) on biological yield and number of seeds per ear”
t0“Corn”
Claim · model-written summary
The interactions of iron, potassium and water deficit stress on biological yield and number of seeds per ear were not significant.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- their interactionse0
- Outcome
- biological yield and number of seeds per eare0
- Direction
- not significante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on biological yield and number of seeds per ear, but their interactions were not significant”
t0“Corn”
Claim · model-written summary
Foliar 25 kg ha-1 potassium sulfate plus iron chelate increased corn seed yield from 5294 kg ha-1 in the unfertilized control to 6978 kg ha-1.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 25 kg.ha-1 of potassium sulfate and iron chelate as foliar spraye0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 6978 kg.ha-1e0
- Qualifier
- 5294 kg.ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 25 kg.ha-1 of potassium sulfate and iron chelate as foliar spray increased seed yield from 5294 kg.ha-1 in control (without fertilizer application) to 6978 kg.ha-1”
t0“Corn”
Claim · model-written summary
Under water deficit stress at the seed milky stage, seed yield increased from 3921 kg ha-1 in the control to 4794 kg ha-1 with the potassium sulfate and iron chelate treatment.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 25 kg.ha-1 of potassium sulfate and iron chelate as foliar spraye0
- Outcome
- seed yielde1
- Direction
- increasede1
- Value
- 4794 kg.ha-1e1
- Qualifier
- under water deficit stress at seed milky stagee1
- Comparator
- control treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 25 kg.ha-1 of potassium sulfate and iron chelate as foliar spray”
e1“seed yield, under water deficit stress at seed milky stage, increased from 3921 kg.ha-1 in control treatment to 4794 kg.ha-1”
t0“Corn”
Claim · model-written summary
Applying 25 kg ha-1 potassium sulfate with iron chelate at pre-tasseling may give acceptable corn yield under water deficit stress.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 25 kg.ha-1 of potassium sulfate along with the application of iron chelatee0
- Outcome
- acceptable yield under water deficit stress conditione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 25 kg.ha-1 of potassium sulfate along with the application of iron chelate, at pre-tasseling stage, may produce acceptable yield under water deficit stress condition”
t0“Corn”
The same questions in other papers
potassium sulfate · yield · Zea mays (maize)Results differ
10 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
8 papers more in this group
See all 12 papers →iron chelate · yield · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- positive
- positive
application · yield · Zea mays (maize)Positive and negative results
574 papers in the same direction as this paper · 42 in the opposite direction · 12 reporting no difference from an alternative
- no effect
- no effect
- negative
625 papers more in this group
See all 629 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.