Abstract
Nutrients such as iron and zinc play a vital role in controlling the negative effects of drought stress through the synthesis of enzymes, maintenance of cell membrane, and activation of antioxidant defense system. Due to these biochemical properties, an experiment was conducted to evaluate effect of spraying iron, zinc and using superabsorbent on grain yield and some of biochemical properties of maize under drought stress in a randomized complete block design in Shooshtar city during the years 2017–2018. The experimental treatments included three levels of drought stress (Irrigation after 30%, 40% and 50% evaporation). Sub-plots consisted of superabsorbent polymer at two levels (control and 200 kg/ha) and combination of iron and zinc (control, iron, zinc, and iron-zinc). The results showed that drought stress affected chlorophyll, proline, iron grain concentration, nitrogen percent, grain protein and grain yield. Drought stress caused a significant reduction in yield. The percentage of grain protein was significantly increased in irrigation treatment at 50% of farming capacity. The highest grain yield and chlorophyll index was observed in 30% irrigation treatment. Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations. Furthermore, drought stress and superabsorbent interacted significantly on grain yield. The interaction among drought stress and superabsorbent elements had significant effects on zinc and iron concentration. The present study suggests that using 200 kg/ha superabsorbent polymer and spraying iron and zinc under the 40% post-discharge irrigation may improve grain yield and biochemical features of maize.
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Claims 13
Claim · model-written summary
Drought stress affected maize chlorophyll and proline.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress affected chlorophyll, proline, iron grain concentration, nitrogen percent, grain protein and grain yield”
t0“maize”
Claim · model-written summary
Drought stress affected maize grain iron concentration, nitrogen percent and protein.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress affected chlorophyll, proline, iron grain concentration, nitrogen percent, grain protein and grain yield”
t0“maize”
Claim · model-written summary
Drought stress significantly reduced maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress caused a significant reduction in yield”
t0“maize”
Claim · model-written summary
Irrigation at 50% of farming capacity significantly increased grain protein percentage.
- Treatment
- irrigation treatment at 50% of farming capacitye0
- Outcome
- percentage of grain proteine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of grain protein was significantly increased in irrigation treatment at 50% of farming capacity”
t0“maize”
Claim · model-written summary
The 30% irrigation treatment produced the highest grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield and chlorophyll index was observed in 30% irrigation treatment”
t0“maize”
Claim · model-written summary
The 30% irrigation treatment produced the highest chlorophyll index.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield and chlorophyll index was observed in 30% irrigation treatment”
t0“maize”
Claim · model-written summary
Spraying iron significantly increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations”
t0“maize”
Claim · model-written summary
Spraying zinc significantly increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations”
t0“maize”
Claim · model-written summary
Spraying iron and zinc significantly increased chlorophyll index.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations”
t0“maize”
Claim · model-written summary
Spraying iron and zinc significantly increased iron and zinc concentrations.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying iron and zinc significantly increased the grain yield, chlorophyll index, iron, and zinc concentrations”
t0“maize”
Claim · model-written summary
Drought stress and superabsorbent significantly interacted in their effect on grain yield.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress and superabsorbent interacted significantly on grain yield”
t0“maize”
Claim · model-written summary
Drought stress and superabsorbent significantly interacted in their effect on zinc and iron concentration.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interaction among drought stress and superabsorbent elements had significant effects on zinc and iron concentration”
t0“maize”
Claim · model-written summary
The authors suggest 200 kg/ha superabsorbent plus iron and zinc spraying under 40% post-discharge irrigation to improve maize yield and biochemical traits.
- Outcome
- using 200 kg/ha superabsorbent polymer and spraying iron and zinc under the 40% post-discharge irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“using 200 kg/ha superabsorbent polymer and spraying iron and zinc under the 40% post-discharge irrigation may improve grain yield and biochemical features of maize”
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See all 43 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.