Abstract
L) under moderate drought stress, a nursery experiment and a field trial were conducted with or without water stress using three representative cultivars released in different years: CW134 (old landrace), CH58 (modern cultivar) and CH1 (new release). In the nursery experiment, plants were grown in soil-filled rhizoboxes under moderate drought (MD, 55% of field capacity) or well-watered (WW, 85% of field capacity) conditions. In the field trial, plots were either rainfed (moderate drought stress) or irrigated with 30 mm of water at each of stem elongation, booting and anthesis stages (irrigated). Compared to drought stress, grain yields increased under sufficient water supply in all cultivars, particular the newly released cultivar CH1 with 70% increase in the nursery and 23% in the field. When well-watered (nursery) or irrigated (field), CH1 had the highest grain yields compared to the other two cultivars, but produced similar yield to the modern cultivar (CH58) under water-stressed (nursery) or rainfed (field) conditions. When exposed to drought stress, CW134 had the highest topsoil root dry mass in topsoil but lowest in subsoil among the cultivars at stem elongation, anthesis, and maturity, respectively; while CH1 had the lowest topsoil and highest subsoil root dry mass at respective sampling times. Topsoil root mass and root length density were negatively correlated with grain yield for the two water treatments in nursery experiment. When water was limited, subsoil root mass was positively correlated with thousand kernel weight (TKW). In the field trial, CH1 and CH58 used less water during vegetative growth than CW134, but after anthesis stage, CH1 used more water than the other two cultivars, especially in the soil profile below 100 cm, which was associated with the increased TKW. This study demonstrated that greater root mass and root length density in subsoil layers, with enhanced access to subsoil water after anthesis, contribute to high grain yield when soil water is scarce.
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Claims 15
Claim · model-written summary
Grain yield was higher under sufficient water supply than under drought stress in all cultivars
- Taxon
- Winter Wheat
Triticum aestivumt0 - Material
- all cultivarse0
- Treatment
- sufficient water supplye0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Comparator
- drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to drought stress, grain yields increased under sufficient water supply in all cultivars”
t0“Winter Wheat”
Claim · model-written summary
Cultivar CH1 showed a 70% grain yield increase under sufficient water relative to drought in the nursery
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Treatment
- sufficient water supplye0
- Outcome
- grain yieldse0
- Direction
- increasee0
- Value
- 70%e0
- Comparator
- drought stresse0
- Setting
- the nurserye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to drought stress, grain yields increased under sufficient water supply in all cultivars, particular the newly released cultivar CH1 with 70% increase in the nursery and 23% in the field”
t0“Winter Wheat”
Claim · model-written summary
Cultivar CH1 showed a 23% grain yield increase under sufficient water relative to drought in the field
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Treatment
- sufficient water supplye0
- Outcome
- grain yieldse0
- Direction
- increasee0
- Value
- 23%e0
- Comparator
- drought stresse0
- Setting
- in the fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to drought stress, grain yields increased under sufficient water supply in all cultivars, particular the newly released cultivar CH1 with 70% increase in the nursery and 23% in the field”
t0“Winter Wheat”
Claim · model-written summary
Under well-watered or irrigated conditions CH1 had the highest grain yields compared with the other two cultivars
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Treatment
- well-watered (nursery) or irrigated (field)e0
- Outcome
- grain yieldse0
- Direction
- higheste0
- Comparator
- the other two cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When well-watered (nursery) or irrigated (field), CH1 had the highest grain yields compared to the other two cultivars, but produced similar yield to the modern cultivar (CH58) under water-stressed (nursery) or rainfed (field) conditions”
t0“Winter Wheat”
Claim · model-written summary
Under water-stressed or rainfed conditions CH1 produced similar yield to the modern cultivar CH58
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Treatment
- water-stressed (nursery) or rainfed (field) conditionse0
- Outcome
- similar yielde0
- Comparator
- the modern cultivar (CH58)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When well-watered (nursery) or irrigated (field), CH1 had the highest grain yields compared to the other two cultivars, but produced similar yield to the modern cultivar (CH58) under water-stressed (nursery) or rainfed (field) conditions”
t0“Winter Wheat”
Claim · model-written summary
Under drought stress CW134 had the highest topsoil root dry mass among the cultivars
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CW134e0
- Organ / stage
- topsoile0
- Treatment
- drought stresse0
- Outcome
- topsoil root dry masse0
- Direction
- higheste0
- Qualifier
- at stem elongation, anthesis, and maturity, respectivelye0
- Comparator
- among the cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When exposed to drought stress, CW134 had the highest topsoil root dry mass in topsoil but lowest in subsoil among the cultivars at stem elongation, anthesis, and maturity, respectively; while CH1 had the lowest topsoil and highest subsoil root dry mass at respective sampling times”
t0“Winter Wheat”
Claim · model-written summary
Under drought stress CW134 had the lowest subsoil root dry mass among the cultivars
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CW134e0
- Organ / stage
- subsoile0
- Treatment
- drought stresse0
- Outcome
- root dry masse0
- Direction
- loweste0
- Comparator
- among the cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When exposed to drought stress, CW134 had the highest topsoil root dry mass in topsoil but lowest in subsoil among the cultivars at stem elongation, anthesis, and maturity, respectively; while CH1 had the lowest topsoil and highest subsoil root dry mass at respective sampling times”
t0“Winter Wheat”
Claim · model-written summary
Under drought stress CH1 had the lowest topsoil root dry mass
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Organ / stage
- topsoile0
- Treatment
- drought stresse0
- Outcome
- root dry masse0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When exposed to drought stress, CW134 had the highest topsoil root dry mass in topsoil but lowest in subsoil among the cultivars at stem elongation, anthesis, and maturity, respectively; while CH1 had the lowest topsoil and highest subsoil root dry mass at respective sampling times”
t0“Winter Wheat”
Claim · model-written summary
Under drought stress CH1 had the highest subsoil root dry mass
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Organ / stage
- subsoile0
- Treatment
- drought stresse0
- Outcome
- root dry masse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When exposed to drought stress, CW134 had the highest topsoil root dry mass in topsoil but lowest in subsoil among the cultivars at stem elongation, anthesis, and maturity, respectively; while CH1 had the lowest topsoil and highest subsoil root dry mass at respective sampling times”
t0“Winter Wheat”
Claim · model-written summary
Topsoil root mass and root length density were negatively correlated with grain yield under both water treatments in the nursery experiment
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- two water treatmentse0
- Outcome
- Topsoil root mass and root length densitye0
- Direction
- negatively correlatede0
- Setting
- nursery experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topsoil root mass and root length density were negatively correlated with grain yield for the two water treatments in nursery experiment”
t0“Winter Wheat”
Claim · model-written summary
When water was limited, subsoil root mass was positively correlated with thousand kernel weight
- Taxon
- Winter WheatTriticum aestivumt0
- Organ / stage
- subsoile0
- Treatment
- water was limitede0
- Outcome
- thousand kernel weight (TKW)e0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When water was limited, subsoil root mass was positively correlated with thousand kernel weight (TKW)”
t0“Winter Wheat”
Claim · model-written summary
In the field trial CH1 and CH58 used less water than CW134 during vegetative growth
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1 and CH58e0
- Outcome
- watere0
- Direction
- lesse0
- Qualifier
- during vegetative growthe0
- Comparator
- CW134e0
- Setting
- In the field triale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the field trial, CH1 and CH58 used less water during vegetative growth than CW134, but after anthesis stage, CH1 used more water than the other two cultivars, especially in the soil profile below 100 cm, which was associated with the increased TKW”
t0“Winter Wheat”
Claim · model-written summary
In the field trial CH1 used more water than the other two cultivars after anthesis, especially in the soil profile below 100 cm
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Organ / stage
- soil profile below 100 cme0
- Outcome
- watere0
- Direction
- moree0
- Qualifier
- after anthesis stagee0
- Comparator
- the other two cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the field trial, CH1 and CH58 used less water during vegetative growth than CW134, but after anthesis stage, CH1 used more water than the other two cultivars, especially in the soil profile below 100 cm, which was associated with the increased TKW”
t0“Winter Wheat”
Claim · model-written summary
The additional water use of CH1 was associated with an increased thousand kernel weight
- Taxon
- Winter WheatTriticum aestivumt0
- Material
- CH1e0
- Outcome
- TKWe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the field trial, CH1 and CH58 used less water during vegetative growth than CW134, but after anthesis stage, CH1 used more water than the other two cultivars, especially in the soil profile below 100 cm, which was associated with the increased TKW”
t0“Winter Wheat”
Claim · model-written summary
Greater root mass and root length density in subsoil layers, with enhanced subsoil water access after anthesis, may contribute to high grain yield when soil water is scarce
- Taxon
- Winter WheatTriticum aestivumt0
- Organ / stage
- subsoil layerse0
- Outcome
- high grain yielde0
- Qualifier
- when soil water is scarcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study demonstrated that greater root mass and root length density in subsoil layers, with enhanced access to subsoil water after anthesis, contribute to high grain yield when soil water is scarce”
t0“Winter Wheat”
The same questions in other papers
irrigation · yield · Triticum aestivum (wheat)Positive and negative results
797 papers in the same direction as this paper · 184 in the opposite direction · 7 reporting no difference from an alternative
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- positive
- negative
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