Abstract
[Objective] The aim was to quantitatively explore effects of flood disasters on summer maize's characters and yield in different areas of Henan Province.[Method] A simulation test was carried out in Zhumadian and Puyang areas of Henan Province in 2008 and 2009,which accounted for a number of factors,especially the flooded days and flooding period.Finally,the evaluation model of maize yield loss was studied.[Result] Flooding had obvious effects on the mortality,spike rate and grain weight per plant of summer corn,while the plant height,ear length,ear diameter,100-seed weight and bald rate were less affected.The same flooding days and period had different effects on summer corn of Henan different areas.1 day flooding had little effect on corn production,while more than 3 days flooding led to over 30% reduction.More than 5 and 7 days flooding led to over 50% and 70% reduction,respectively.During the jointing stage,7 days flooding resulted in a total failure for summer corn,and this was also the same case for 7 days flooding during the anthesis stage.Flooding in the jointing stage resulted in more damage than in the anthesis stage for corn's characters and yield.During the jointing stage,the evaluation model of flooded days and maize yield loss was Yjointing =-0.347 5Xjointing3 + 2.829 2Xjointing2 +10.162 0Xjointing-2.375 5,R2=0.895 8;during the anthesis stage,it was Yanthesis=-0.193 6Xanthesis3 + 2.077 2Xanthesis2+ 7.372 1Xanthesis-2.266 2,R2=0.949 7.[Conclusion] The research provides reference for studies on flood monitoring and fast evaluation of disaster damage.
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Claims 12
Claim · model-written summary
Flooding strongly affected summer corn mortality, spike rate and grain weight per plant.
- Taxon
- summer corn
Zea mays subsp. mayse0 - Treatment
- Floodinge0
- Outcome
- mortality,spike rate and grain weight per plante0
- Direction
- obvious effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flooding had obvious effects on the mortality,spike rate and grain weight per plant of summer corn”
Claim · model-written summary
Flooding affected plant height, ear length, ear diameter, 100-seed weight and bald rate less.
Not reportedTaxonTreatmentComparator
Verbatim
e0“while the plant height,ear length,ear diameter,100-seed weight and bald rate were less affected”
Claim · model-written summary
Identical flood duration and stage affected summer corn differently across Henan areas.
- Taxon
- summer cornZea mays subsp. mayse0
- Outcome
- different effectse0
- Setting
- Henane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same flooding days and period had different effects on summer corn of Henan different areas”
Claim · model-written summary
One day of flooding had little effect on corn production.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 1 day floodinge0
- Outcome
- corn productione0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1 day flooding had little effect on corn production”
Claim · model-written summary
More than three days of flooding reduced corn production by over 30%.
Not reportedTaxonComparatorOutcome
Verbatim
e0“more than 3 days flooding led to over 30% reduction”
Claim · model-written summary
More than five days of flooding reduced corn production by over 50%.
Not reportedTaxonComparatorOutcome
Verbatim
e0“More than 5 and 7 days flooding led to over 50% and 70% reduction,respectively”
Claim · model-written summary
More than seven days of flooding reduced corn production by over 70%.
Not reportedTaxonComparatorOutcome
Verbatim
e0“More than 5 and 7 days flooding led to over 50% and 70% reduction,respectively”
Claim · model-written summary
Seven days of flooding at jointing caused total failure of summer corn.
- Taxon
- summer cornZea mays subsp. mayse0
- Organ / stage
- jointing stagee0
- Treatment
- 7 days floodinge0
- Outcome
- total failuree0
- Direction
- total failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the jointing stage,7 days flooding resulted in a total failure for summer corn”
Claim · model-written summary
Seven days of flooding at anthesis caused total failure of summer corn.
Not reportedTaxonComparator
Verbatim
e0“this was also the same case for 7 days flooding during the anthesis stage”
Claim · model-written summary
Flooding at jointing caused more damage to corn traits and yield than flooding at anthesis.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Flooding in the jointing stagee0
- Outcome
- corn's characters and yielde0
- Direction
- more damagee0
- Comparator
- anthesis stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flooding in the jointing stage resulted in more damage than in the anthesis stage for corn's characters and yield”
Claim · model-written summary
A jointing-stage flood-duration model explained maize yield loss with R2 of 0.895 8.
Verbatim
e0“During the jointing stage,the evaluation model of flooded days and maize yield loss was Yjointing =-0.347 5Xjointing3 + 2.829 2Xjointing2 +10.162 0Xjointing-2.375 5,R2=0.895 8”
Claim · model-written summary
An anthesis-stage flood-duration model explained maize yield loss with R2 of 0.949 7.
Verbatim
e0“during the anthesis stage,it was Yanthesis=-0.193 6Xanthesis3 + 2.077 2Xanthesis2+ 7.372 1Xanthesis-2.266 2,R2=0.949 7”
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