Abstract
abstract Yield of cotton ( Gossypium hirsutum L .) is proportional to the number of fruits (bolls) produced, which is a function of flower production and boll retention. It bas been known for many years that a severe water deficit decreases boll retention, but tbe reports did not indicate a critical plant water status below which field‐grown plants lost bolls. Field experiments were conducted with 'DPL 70' cotton on an Avondale clay loam (a member of the fine‐loamy, mixed, hyperthermic family of Typic Torrifluvents) to a) quantify the relationship between leaf water potential (xylem pressure potential) and boll retention, and b) to assess the importance of boll load in modifying the results. Two irrigation levels were compared through the season. Boll retention was high early in the season at midday leaf water potentials from −1.4 to −1.9 MPa, but decreased when the leaf water potential decreased below about −1.9 MPa. Boll retention decreased as boll load increased. Because water deficit decreased flowering and boll retention, it limited the boll load. The feedback effect of boll load on boll retention tended to counteract the effect of water deficit on boll retention. Water deficit decreased yield, in part because of decreased flowering and in part because of decreased boll retentio
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Claims 8
Claim · model-written summary
Boll retention was high early in the season at leaf water potentials from −1.4 to −1.9 MPa.
- Taxon
- cotton
Gossypium hirsutumt0 - Outcome
- Boll retentione0
- Direction
- highe0
- Value
- −1.4 to −1.9 MPae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll retention was high early in the season at midday leaf water potentials from −1.4 to −1.9 MPa”
t0“Cotton”
Claim · model-written summary
Boll retention fell below about −1.9 MPa leaf water potential.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Boll retentione0
- Direction
- decreasede0
- Value
- −1.9 MPae0
- Comparator
- leaf water potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll retention was high early in the season at midday leaf water potentials from −1.4 to −1.9 MPa, but decreased when the leaf water potential decreased below about −1.9 MPa”
t0“Cotton”
Claim · model-written summary
Boll retention fell as boll load increased.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- Boll retentione0
- Direction
- decreasede0
- Comparator
- boll loade0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll retention decreased as boll load increased”
t0“Cotton”
Claim · model-written summary
Water deficit decreased flowering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- water deficite0
- Outcome
- floweringe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficit decreased flowering and boll retention”
t0“Cotton”
Claim · model-written summary
Water deficit decreased boll retention.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- water deficite0
- Outcome
- boll retentione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficit decreased flowering and boll retention”
t0“Cotton”
Claim · model-written summary
Water deficit limited boll load.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- water deficite0
- Outcome
- boll loade0
- Direction
- limitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Because water deficit decreased flowering and boll retention, it limited the boll load”
t0“Cotton”
Claim · model-written summary
Boll load feedback tended to counteract the water deficit effect on boll retention.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- boll retentione0
- Qualifier
- feedback effect of boll loade0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“feedback effect of boll load on boll retention tended to counteract the effect of water deficit on boll retention”
t0“Cotton”
Claim · model-written summary
Water deficit decreased yield.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Water deficite0
- Outcome
- yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water deficit decreased yield”
t0“Cotton”
The same questions in other papers
drought · yield · Gossypium hirsutum (cotton)Positive and negative results
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- negative
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See all 82 papers →drought · phenology · Gossypium hirsutum (cotton)Results agree
5 papers in the same direction as this paper
- no effect
- negative
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See all 6 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.