Abstract
The premature senescence of cotton under drip irrigation below mulch film(DI) is much more widespread than under flooding irrigation(FI),and the change of plants nutrient under DI has been regarded as a possible influencing factor.In this study,a field experiment was conducted to investigate the cotton growth and nutrient status under DI in comparison to FI.The results indicate that there are severe symptoms of premature senescence at the later growth stages of cotton under DI,while there are not the symptoms under FI.At 125 DAS(late boll stage),the shoot biomass under DI is significantly higher than that under FI,while root biomasses show the opposite trend,and the shoot/root ratio under DI is significantly higher than that under FI.The shoot dry weight of plants grown under DI is abruptly decreased from 125 DAS(late boll stage) to 160 DAS(harvest stage).Field observations indicate the main reason for the decrease is the shedding of a large number of leaves,squares and bolls.The shoot to root ratio under DI is also decreased to the same level as that of the FI treatment.To analysis the cotton leaf nutrition,it would be found that the nitrogen and phosphorus concentrations of old leaves are lower than those of young leaves under both of DI and FI at the later growth stages,whereas the potassium concentration is opposite.The K concentration of young leaves under DI is lower than that under FI,and the K concentration of cotton shoot also shows a same trend.These results indicate that the premature senescence of cotton under DI may be that the K need of the shoots exceeds that K amount of the roots is able to supply.
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Claims 12
Claim · model-written summary
Premature senescence of cotton is more widespread under drip irrigation below mulch film than under flood irrigation.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- drip irrigation below mulch filme0
- Outcome
- premature senescencee0
- Direction
- more widespreade0
- Comparator
- flooding irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The premature senescence of cotton under drip irrigation below mulch film(DI) is much more widespread than under flooding irrigation(FI)”
Claim · model-written summary
Shoot biomass of cotton at the late boll stage was significantly higher under DI than under FI.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- late boll stagee1
- Treatment
- DIe1
- Outcome
- shoot biomasse1
- Direction
- highere1
- Comparator
- FIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e1“At 125 DAS(late boll stage),the shoot biomass under DI is significantly higher than that under FI,while root biomasses show the opposite trend”
Claim · model-written summary
Root biomass of cotton showed the opposite trend to shoot biomass under DI compared with FI.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- DIe1
- Outcome
- root biomassese1
- Direction
- opposite trende1
- Comparator
- FIe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e1“At 125 DAS(late boll stage),the shoot biomass under DI is significantly higher than that under FI,while root biomasses show the opposite trend”
Claim · model-written summary
Shoot/root ratio of cotton was significantly higher under DI than under FI.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- DIe2
- Outcome
- shoot/root ratioe2
- Direction
- highere2
- Comparator
- FIe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e2“and the shoot/root ratio under DI is significantly higher than that under FI”
Claim · model-written summary
Shoot dry weight of cotton under DI abruptly decreased from the late boll stage to harvest.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- harvest stagee3
- Treatment
- DIe3
- Outcome
- shoot dry weighte3
- Direction
- abruptly decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e3“The shoot dry weight of plants grown under DI is abruptly decreased from 125 DAS(late boll stage) to 160 DAS(harvest stage)”
Claim · model-written summary
Shedding of many leaves, squares and bolls was the main reason for the shoot dry weight decrease under DI.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- the decreasee4
- Qualifier
- shedding of a large number of leaves,squares and bollse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e4“Field observations indicate the main reason for the decrease is the shedding of a large number of leaves,squares and bolls”
Claim · model-written summary
The shoot to root ratio under DI decreased to the same level as under FI.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- DIe5
- Outcome
- shoot to root ratioe5
- Direction
- decreasede5
- Comparator
- FIe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e5“The shoot to root ratio under DI is also decreased to the same level as that of the FI treatment”
Claim · model-written summary
Nitrogen and phosphorus concentrations of old leaves were lower than in young leaves under DI and FI at later growth stages.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- old leavese6
- Outcome
- nitrogen and phosphorus concentrations of old leavese6
- Direction
- lowere6
- Qualifier
- at the later growth stagese6
- Comparator
- young leavese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e6“the nitrogen and phosphorus concentrations of old leaves are lower than those of young leaves under both of DI and FI at the later growth stages”
Claim · model-written summary
Potassium concentration of old leaves was opposite to that of young leaves.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- potassium concentratione7
- Direction
- oppositee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cotton premature senescence under drip irrigation below mulch film”
e7“whereas the potassium concentration is opposite”
Claim · model-written summary
Potassium concentration of young leaves was lower under DI than under FI.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- DIe0
- Outcome
- K concentration of young leavese0
- Direction
- lowere0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K concentration of young leaves under DI is lower than that under FI,and the K concentration of cotton shoot also shows a same trend”
Claim · model-written summary
Potassium concentration of cotton shoot showed the same trend under DI as young-leaf potassium.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- DIe0
- Outcome
- K concentration of cotton shoote0
- Direction
- same trende0
- Comparator
- FIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K concentration of young leaves under DI is lower than that under FI,and the K concentration of cotton shoot also shows a same trend”
Claim · model-written summary
Premature senescence under DI may result from shoot K demand exceeding the K supply from roots.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- DIe1
- Outcome
- premature senescencee1
- Qualifier
- the K need of the shoots exceeds that K amount of the roots is able to supplye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the premature senescence of cotton under DI may be that the K need of the shoots exceeds that K amount of the roots is able to supply”
The same questions in other papers
irrigation · quality: postharvest · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.