Abstract
Subjecting barley at four stages of development to short-term periods of 2–7 days flooding of a Gleizolic soil reduced the dry weight of the plants from that of non-flooded plants in proportion to the duration of flooding. Barley 14 days old at flooding was injured more than barley 35 days old at flooding, although the injury was more permanent with the older plants. Delayed head emergence and up to 55% reduction in grain yields were measured. Eh values of 289 mv, or less, were measured below the 5-cm depth although there was no flooding-induced increase in the concentration of water-soluble or exchangeable Mn in the soil. The concentration of Mn in the barley was not altered by flooding. Short-term flooding reduced the concentration of N, P and K in the barley. The greatest decrease was measured in the youngest plants; at the end of 7 days' flooding the concentration of N, P and K was reduced by 51, 60 and 58%, respectively. Two wk after drainage, N, P and K levels in the youngest plants recovered to levels equal to non-flooded barley, whereas more mature plants were subject to continued depressed levels. Under the conditions of this experiment, the reduced growth and yield of barley resulting from short-term flooding was not due to Mn toxicity, but may be due to reduced ion uptake resulting from O 2 deficiency brought about by the reducing conditions in the soil or other unknown factors.
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Claims 15
Claim · model-written summary
Flooding reduced barley dry weight relative to non-flooded plants, in proportion to flooding duration.
- Taxon
- barley
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Hordeum vulgaree2 - Organ / stage
- four stages of developmente2
- Treatment
- flooding of a Gleizolic soile1
- Outcome
- dry weight of the plantse1
- Direction
- reducede1
- Qualifier
- in proportion to the duration of floodinge1
- Comparator
- non-flooded plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“flooding of a Gleizolic soil reduced the dry weight of the plants from that of non-flooded plants in proportion to the duration of flooding”
e2“Subjecting barley at four stages of development”
Claim · model-written summary
Barley injured by flooding at 14 days old was injured more than barley 35 days old at flooding.
- Taxon
- barleyHordeum vulgaree2
- Organ / stage
- 14 days olde3
- Treatment
- floodinge3
- Outcome
- injurede3
- Direction
- moree3
- Comparator
- 35 days olde3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e3“Barley 14 days old at flooding was injured more than barley 35 days old at flooding”
Claim · model-written summary
Flooding injury was more permanent in older barley plants.
- Taxon
- barleyHordeum vulgaree2
- Organ / stage
- older plantse4
- Outcome
- injurye4
- Direction
- more permanente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e4“although the injury was more permanent with the older plants”
Claim · model-written summary
Head emergence was delayed in the flooding experiment.
- Taxon
- barleyHordeum vulgaree2
- Outcome
- head emergencee5
- Direction
- Delayede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e5“Delayed head emergence and up to 55% reduction in grain yields were measured”
Claim · model-written summary
Grain yields of flooded barley were reduced by up to 55%.
- Taxon
- barleyHordeum vulgaree2
- Outcome
- grain yieldse5
- Direction
- reductione5
- Value
- up to 55%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e5“Delayed head emergence and up to 55% reduction in grain yields were measured”
Claim · model-written summary
Eh values of 289 mv or less were measured below the 5-cm soil depth.
Not reportedTaxon
Verbatim
e6“Eh values of 289 mv, or less, were measured below the 5-cm depth”
Claim · model-written summary
Flooding did not increase water-soluble or exchangeable Mn in the soil.
- Treatment
- floodinge7
- Outcome
- concentration of water-soluble or exchangeable Mn in the soile7
- Direction
- no flooding-induced increasee7
Not reportedTaxon
Verbatim
e7“although there was no flooding-induced increase in the concentration of water-soluble or exchangeable Mn in the soil”
Claim · model-written summary
Flooding did not alter Mn concentration in barley.
- Taxon
- barleyHordeum vulgaree3
- Treatment
- floodinge3
- Outcome
- concentration of Mn in the barleye3
- Direction
- not alterede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e3“The concentration of Mn in the barley was not altered by flooding”
Claim · model-written summary
Short-term flooding reduced the N concentration of barley by 51 %, the greatest decrease in the youngest plants.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- youngest plantse2
- Treatment
- Short-term floodinge0
- Outcome
- concentration of N, P and Ke1
- Direction
- reducede1
- Value
- 51e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term flooding reduced the concentration of N, P and K in the barley”
e1“the concentration of N, P and K was reduced by 51, 60 and 58%”
e2“The greatest decrease was measured in the youngest plants”
Claim · model-written summary
Short-term flooding reduced the P concentration of barley by 60 %, the greatest decrease in the youngest plants.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- youngest plantse2
- Treatment
- Short-term floodinge0
- Outcome
- concentration of N, P and Ke1
- Direction
- reducede1
- Value
- 60e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term flooding reduced the concentration of N, P and K in the barley”
e1“the concentration of N, P and K was reduced by 51, 60 and 58%”
e2“The greatest decrease was measured in the youngest plants”
Claim · model-written summary
Short-term flooding reduced the K concentration of barley by 58 %, the greatest decrease in the youngest plants.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- youngest plantse2
- Treatment
- Short-term floodinge0
- Outcome
- concentration of N, P and Ke1
- Direction
- reducede1
- Value
- 58e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term flooding reduced the concentration of N, P and K in the barley”
e1“the concentration of N, P and K was reduced by 51, 60 and 58%”
e2“The greatest decrease was measured in the youngest plants”
Claim · model-written summary
N, P and K levels of the youngest barley plants recovered to non-flooded levels two weeks after drainage.
- Taxon
- barleyHordeum vulgaree3
- Organ / stage
- youngest plantse3
- Treatment
- drainagee3
- Outcome
- N, P and K levelse3
- Direction
- recoverede3
- Comparator
- non-flooded barleye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e3“Two wk after drainage, N, P and K levels in the youngest plants recovered to levels equal to non-flooded barley”
Claim · model-written summary
More mature barley plants kept continued depressed nutrient levels after drainage.
- Taxon
- barleyHordeum vulgaree2
- Organ / stage
- more mature plantse3
- Outcome
- levelse3
- Direction
- continued depressede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Subjecting barley at four stages of development”
e3“whereas more mature plants were subject to continued depressed levels”
Claim · model-written summary
The reduced growth and yield of barley under short-term flooding is not due to Mn toxicity.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- reduced growth and yield of barleye0
- Qualifier
- not due to Mn toxicitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduced growth and yield of barley resulting from short-term flooding was not due to Mn toxicity, but may be due to reduced ion uptake resulting from O 2 deficiency brought about by the reducing conditions in the soil”
Claim · model-written summary
Reduced ion uptake from O2 deficiency may explain the reduced growth and yield of barley under flooding.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- reduced growth and yield of barleye0
- Qualifier
- reduced ion uptake resulting from O 2 deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduced growth and yield of barley resulting from short-term flooding was not due to Mn toxicity, but may be due to reduced ion uptake resulting from O 2 deficiency brought about by the reducing conditions in the soil”
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See all 9 papers →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.