Abstract
Lodging incidence in cereal crops depends upon both crop management and environmental conditions. Ethephon [(2‐chloro‐ethyl)phosphomic acid] controls lodging, thus preserving yield. The objective of this study was no investigate the effects of ethephon on spring barley ( Hordeum vulgare L.) with different N rates, irrigation treatments, or application rates of ethephon. Ethephon was applied at Zadoks Growth Stage 43 at 0.28 kg ha ‐1 in the N and irrigation studies, and at rates between 0.1 and 0.5 kg ha ‐1 in the ethephon rate study. Plant height and lodging were reduced by ethephon in each study; however, ethephon did not consistently reduce lodging at Belgian indices of 7.0 and above. Differences in cultivar response were observed. In the ethiphon rate trial, 0.1 kg ha ‐1 ethephon reduced lodging of ‘Harrington’, while 0.25 kg ha ‐1 was required to similarly reduce lodging of ‘Leduc’. Ethephon reduced the number of kernels per spike, had variable effects on grain mass, and delayed crop maturity by up to 4 d. Whole plant protein was unaffected by ethephon. Ethephon reduced grain protein by 25% and decreased straw protein by 9% in 1986, and had no effect on grain protein in 1987. Ethephon was an effective antilodging agent only under moderate lodging pressures; it is not likely to preserve an increased yield under conditions of intense irrigation and high fertility.
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Claims 12
Claim · model-written summary
Ethephon reduced plant height.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- ethephone0
- Outcome
- Plant heighte1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“ethephon on spring barley ( Hordeum vulgare L.)”
e1“Plant height and lodging were reduced by ethephon in each study”
Claim · model-written summary
Ethephon reduced lodging in each study, inconsistently at Belgian indices of at least 7.0.
- Taxon
- spring barleyHordeum vulgaree0
- Treatment
- ethephone0
- Outcome
- lodginge1
- Direction
- reducede1
- Qualifier
- Belgian indices of 7.0 and abovee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethephon on spring barley ( Hordeum vulgare L.)”
e1“lodging were reduced by ethephon in each study; however, ethephon did not consistently reduce lodging at Belgian indices of 7.0 and above”
Claim · model-written summary
Harrington lodging declined with 0.1 kg ha ‐1 ethephon.
- Taxon
- BarleyHordeum vulgaret0
- Material
- ‘Harrington’e0
- Treatment
- 0.1 kg ha ‐1 ethephone0
- Outcome
- lodginge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“0.1 kg ha ‐1 ethephon reduced lodging of ‘Harrington’”
Claim · model-written summary
Leduc required 0.25 kg ha ‐1 ethephon to reduce lodging similarly.
- Taxon
- BarleyHordeum vulgaret0
- Material
- ‘Leduc’e0
- Treatment
- 0.25 kg ha ‐1e0
- Outcome
- lodginge0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“0.25 kg ha ‐1 was required to similarly reduce lodging of ‘Leduc’”
Claim · model-written summary
Ethephon reduced kernels per spike.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ethephone0
- Outcome
- number of kernels per spikee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon reduced the number of kernels per spike”
Claim · model-written summary
Ethephon had variable effects on grain mass.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ethephone0
- Outcome
- grain masse0
- Direction
- variable effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon reduced the number of kernels per spike, had variable effects on grain mass”
Claim · model-written summary
Ethephon delayed crop maturity by up to four days.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ethephone0
- Outcome
- crop maturitye0
- Direction
- delayede0
- Value
- up to 4 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon reduced the number of kernels per spike, had variable effects on grain mass, and delayed crop maturity by up to 4 d”
Claim · model-written summary
Whole plant protein was unaffected by ethephon.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- ethephone0
- Outcome
- Whole plant proteine0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Whole plant protein was unaffected by ethephon”
Claim · model-written summary
Ethephon reduced grain protein by 25% in 1986.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ethephone0
- Outcome
- grain proteine0
- Direction
- reducede0
- Value
- 25%e0
- Qualifier
- 1986e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon reduced grain protein by 25% and decreased straw protein by 9% in 1986”
Claim · model-written summary
Ethephon reduced straw protein by 9% in 1986.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Ethephone0
- Outcome
- straw proteine0
- Direction
- decreasede0
- Value
- 9%e0
- Qualifier
- 1986e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon reduced grain protein by 25% and decreased straw protein by 9% in 1986”
Claim · model-written summary
Ethephon had no effect on grain protein in 1987.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- grain proteine0
- Direction
- no effecte0
- Qualifier
- 1987e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“had no effect on grain protein in 1987”
Claim · model-written summary
Authors concluded ethephon works against lodging only at moderate pressure and is unlikely to preserve yield under intense irrigation and fertility.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- effective antilodging agent only under moderate lodging pressurese0
- Qualifier
- intense irrigation and high fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Barley”
e0“Ethephon was an effective antilodging agent only under moderate lodging pressures; it is not likely to preserve an increased yield under conditions of intense irrigation and high fertility”
The same questions in other papers
(2-chloroethyl)phosphonic acid · quality: protein · Hordeum vulgare (barley)Results differ
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →(2-chloroethyl)phosphonic acid · yield · Hordeum vulgare (barley)Results differ
8 papers in the same direction as this paper · 22 in the opposite direction
- positive
- negative
- positive
27 papers more in this group
See all 31 papers →(2-chloroethyl)phosphonic acid · growth · Hordeum vulgare (barley)Positive and negative results
14 papers in the same direction as this paper · 4 in the opposite direction
- positive
- negative
- negative
15 papers more in this group
See all 19 papers →(2-chloroethyl)phosphonic acid · phenology · Hordeum vulgare (barley)Results agree
2 papers in the same direction as this paper
- negative
- 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.