Abstract
The main mode of resource assimilation relevant to wheat grain yield is photosynthesis.Irrigation is a critical cultivation measure for plant growth and photosynthesis.Despite the tremendous progress in understanding the effects of irrigation on photosynthesis,the mechanism of irrigation on population photosynthesis(PP) remains unclear.A field experi-ment was therefore conducted to clarify the regulation mechanisms of different irrigation schedules on population photosynthetic of winter wheat.The experiment included 5 irrigation schedules [no irrigation(W0),1-time irrigation at jointing(W1j) or booting(W1b) stage,2-time irrigation at jointing and booting stages(W2),and 3-time irrigation at jointing,booting and grain-filling stages(W3)] and 3 planting densities [180(D1),300(D2) and 450(D3) seedlings per square meter].The results indicated that irrigation signifi-cantly improved PP.The relationship between PP and irrigation time/volume was to some extent parabolic.Improvements in PP(re-sulting from more irrigation time/volume) were mainly related to increases in leaf area index(LAI) and population light interception.PP exhibited a significantly negative correlation with percent canopy light transmittance.PP at grain filling stage was significantly positively correlated with accumulated dry matter and grain yield.In terms of main effects,partial correlation analysis showed that PP of W0,W1j,W1b and W3 was regulated by percent population light transmission and leaf area.On the other hand,W2 PP was mainly influenced by flag-leaf photosynthetic rate.This indicated that spring irrigations at jointing and booting stages(W2) led to higher photosynthetic rate and yield output.On this basis,planting 300 seedlings per square meter was the optimum combination.The combination of W2 and D2 increased PP during mid-late growth stages and extended high PP duration,which ultimately in-creased grain yield.
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Claims 10
Claim · model-written summary
The relationship between population photosynthesis and irrigation time or volume was to some extent parabolic.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- irrigation time/volumee2
- Outcome
- PPe2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e2“The relationship between PP and irrigation time/volume was to some extent parabolic”
Claim · model-written summary
Improvements in population photosynthesis from more irrigation were mainly related to increases in leaf area index and population light interception.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- more irrigation time/volumee3
- Outcome
- leaf area index(LAI) and population light interceptione3
- Direction
- increasese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e3“Improvements in PP(re-sulting from more irrigation time/volume) were mainly related to increases in leaf area index(LAI) and population light interception”
Claim · model-written summary
Population photosynthesis showed a significantly negative correlation with percent canopy light transmittance.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- percent canopy light transmittancee4
- Outcome
- PPe4
- Direction
- negative correlatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e4“PP exhibited a significantly negative correlation with percent canopy light transmittance”
Claim · model-written summary
Population photosynthesis at grain filling stage was significantly positively correlated with accumulated dry matter and grain yield.
- Taxon
- winter wheatTriticum aestivumt0
- Organ / stage
- grain filling stagee5
- Outcome
- accumulated dry matter and grain yielde5
- Direction
- positively correlatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e5“PP at grain filling stage was significantly positively correlated with accumulated dry matter and grain yield”
Claim · model-written summary
Population photosynthesis of W0, W1j, W1b and W3 was regulated by percent population light transmission and leaf area.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- W0,W1j,W1b and W3e6
- Outcome
- PPe6
- Qualifier
- percent population light transmission and leaf areae6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e6“PP of W0,W1j,W1b and W3 was regulated by percent population light transmission and leaf area”
Claim · model-written summary
Population photosynthesis of W2 was mainly influenced by flag-leaf photosynthetic rate.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- W2e7
- Outcome
- PPe7
- Qualifier
- flag-leaf photosynthetic ratee7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e7“W2 PP was mainly influenced by flag-leaf photosynthetic rate”
Claim · model-written summary
Spring irrigations at jointing and booting stages (W2) led to higher photosynthetic rate and yield output.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- spring irrigations at jointing and booting stages(W2)e1
- Outcome
- photosynthetic rate and yield outpute1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e1“spring irrigations at jointing and booting stages(W2) led to higher photosynthetic rate and yield output”
Claim · model-written summary
Planting 300 seedlings per square meter is the optimum planting combination for winter wheat.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- planting 300 seedlings per square metere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e1“planting 300 seedlings per square meter was the optimum combination”
Claim · model-written summary
The combination of W2 and D2 increased population photosynthesis during mid-late growth stages and extended high population photosynthesis duration.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- combination of W2 and D2e1
- Outcome
- PP during mid-late growth stages and extended high PP duratione1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e1“The combination of W2 and D2 increased PP during mid-late growth stages and extended high PP duration,which ultimately in-creased grain yield”
Claim · model-written summary
The combination of W2 and D2 increased grain yield of winter wheat.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- combination of W2 and D2e1
- Outcome
- grain yielde1
- Direction
- in-creasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“population photosynthesis of winter wheat”
e1“The combination of W2 and D2 increased PP during mid-late growth stages and extended high PP duration,which ultimately in-creased grain yield”
The same questions in other papers
irrigation · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
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- negative
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