Abstract
To study the effects of sowing date on yield and photosynthetic characteristics of spring maize under high yield(≥13 500kg·hm-2)conditions,a randomized block design field experiment was conducted with three maize hybrids Suyu30,Suyu20,Suyu29as materials.Four Treatments including seedling transplant in early-stage(ⅠY),direct sowing in the medium term(ⅠZ),seedling transplant in the medium term(ⅡY)and direct sowing in late-stage(ⅡZ)respectively were arranged in this design.Results showed that:① Early sowing can make maize seedling avoid the dwarf maize disease transmitted by planthopper and stress conditions of high temperature and humidity at anthesis stage,and can build an environment of reasonable photosynthesis for maize filling stage.As a result,total ears and 1 000-grain weight were increased.② Under the same condition with 82 500plants per hectare,1 000-grain weight played the most important role to the yield with the different sowing dates and methods,and to total ears.③ Early sowing and seedling transplant can increase the rate of photosynthetic(Pn),stomatal conductance(Gs),transpiration(Tr)at anthesis stage,and decrease their magnitudes of the drop during filling stage,but the intercellular CO2concentration(Ci)varied oppositely with them.
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Claims 6
Claim · model-written summary
Early sowing increased total ears.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing can make maize seedling avoid the dwarf maize disease transmitted by planthopper and stress conditions of high temperature and humidity at anthesis stage,and can build an environment of reasonable photosynthesis for maize filling stage.As a result,total ears and 1 000-grain weight were increased.”
t0“spring maize”
Claim · model-written summary
Early sowing increased 1 000-grain weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As a result,total ears and 1 000-grain weight were increased.”
t0“spring maize”
e1“Early sowing can make maize seedling avoid the dwarf maize disease”
Claim · model-written summary
At 82 500 plants per hectare, 1 000-grain weight was the most important yield contributor across sowing dates and methods.
- Organ / stage
- 1 000-grain weighte0
- Outcome
- yielde0
- Direction
- most importante0
- Qualifier
- 82 500plants per hectaree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the same condition with 82 500plants per hectare,1 000-grain weight played the most important role to the yield with the different sowing dates and methods,and to total ears.”
t0“spring maize”
Claim · model-written summary
Early sowing and seedling transplant increased photosynthetic rate, stomatal conductance, and transpiration at anthesis.
- Organ / stage
- anthesis stagee0
- Treatment
- Early sowing and seedling transplante0
- Outcome
- rate of photosynthetic(Pn),stomatal conductance(Gs),transpiration(Tr)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing and seedling transplant can increase the rate of photosynthetic(Pn),stomatal conductance(Gs),transpiration(Tr)at anthesis stage”
t0“spring maize”
Claim · model-written summary
Early sowing and seedling transplant reduced the decline of photosynthetic rate, stomatal conductance, and transpiration during filling.
- Organ / stage
- filling stagee0
- Treatment
- Early sowing and seedling transplante0
- Outcome
- magnitudes of the drope0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing and seedling transplant can increase the rate of photosynthetic(Pn),stomatal conductance(Gs),transpiration(Tr)at anthesis stage,and decrease their magnitudes of the drop during filling stage”
t0“spring maize”
Claim · model-written summary
Intercellular CO2 concentration varied oppositely to the other photosynthetic measures.
- Outcome
- intercellular CO2concentration(Ci)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the intercellular CO2concentration(Ci)varied oppositely with them.”
t0“spring maize”
The same questions in other papers
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- positive
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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.