Abstract
Drought is an important factor limiting corn ( Zea mays L.) yields in the Texas High Plains, and adoption of drought‐tolerant (DT) hybrids could be a management tool under water shortage. We conducted a 3‐yr field study to investigate yield, evapotranspiration (ET), and water use efficiency (WUE) in DT hybrids. One conventional (33D49) and 4 DT hybrids (P1151HR, P1324HR, P1498HR, and P1564HR) were grown at three water regimes (I 100 , I 75 , and I 50 , referring to 100, 75, and 50% ET requirement) and three planting densities (PD) (5.9, 7.4, and 8.4 plants m −2 ). Yield (13.56 Mg ha −1 ) and ET (719 mm) were the greatest at I 100 but WUE (2.1 kg m −3 ) was the greatest at I 75 . Although DT hybrids did not always have greater yield and WUE than 33D49 at I 100 , hybrids P1151HR and P1564HR consistently had greater yield and WUE than 33D49 at I 75 and I 50 . Compared to 33D49, P1151HR and P1564HR had 8.6 to 12.1% and 19.1% greater yield at I 75 and I 50 , respectively. Correspondingly, WUE was 9.8 to 11.7% and 20.0% greater at I 75 and I 50 , respectively. Greater PD resulted in greater yield and WUE at I 100 and I 75 but PD did not affect yield and WUE at I 50 . Yield and WUE in greater PD (8.4 plants m −2 ) were 6.3 to 8.3% greater than those in smaller PD (5.9 plants m −2 ). The results of this study demonstrated that proper selection of DT hybrids can increase corn yield and WUE under water‐limited conditions.
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Claims 12
Claim · model-written summary
Yield was greatest at I 100, at 13.56 Mg ha −1.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- I 100e0
- Outcome
- Yielde0
- Direction
- greateste0
- Value
- 13.56 Mg ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield (13.56 Mg ha −1 ) and ET (719 mm) were the greatest at I 100”
t0“Corn”
Claim · model-written summary
ET was greatest at I 100, at 719 mm.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield (13.56 Mg ha −1 ) and ET (719 mm) were the greatest at I 100”
t0“Corn”
Claim · model-written summary
WUE was greatest at I 75, at 2.1 kg m −3.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WUE (2.1 kg m −3 ) was the greatest at I 75”
t0“Corn”
Claim · model-written summary
P1151HR and P1564HR had greater yield at I 75 and I 50 than 33D49.
- Taxon
- CornZea mays subsp. mayst0
- Material
- P1151HR and P1564HRe0
- Outcome
- yielde0
- Direction
- greatere0
- Qualifier
- I 75 and I 50e0
- Comparator
- 33D49e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hybrids P1151HR and P1564HR consistently had greater yield and WUE than 33D49 at I 75 and I 50”
t0“Corn”
Claim · model-written summary
P1151HR and P1564HR had greater WUE at I 75 and I 50 than 33D49.
- Taxon
- CornZea mays subsp. mayst0
- Material
- P1151HR and P1564HRe0
- Outcome
- WUEe0
- Direction
- greatere0
- Qualifier
- I 75 and I 50e0
- Comparator
- 33D49e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hybrids P1151HR and P1564HR consistently had greater yield and WUE than 33D49 at I 75 and I 50”
t0“Corn”
Claim · model-written summary
P1151HR and P1564HR had 8.6 to 12.1% greater yield at I 75.
- Taxon
- CornZea mays subsp. mayst0
- Material
- P1151HR and P1564HRe0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 8.6 to 12.1%e0
- Qualifier
- I 75e0
- Comparator
- 33D49e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 33D49, P1151HR and P1564HR had 8.6 to 12.1% and 19.1% greater yield at I 75 and I 50 , respectively”
t0“Corn”
Claim · model-written summary
P1151HR and P1564HR had 19.1% greater yield at I 50.
- Taxon
- CornZea mays subsp. mayst0
- Material
- P1151HR and P1564HRe0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 19.1%e0
- Qualifier
- I 50e0
- Comparator
- 33D49e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to 33D49, P1151HR and P1564HR had 8.6 to 12.1% and 19.1% greater yield at I 75 and I 50 , respectively”
t0“Corn”
Claim · model-written summary
WUE was 9.8 to 11.7% greater at I 75.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WUE was 9.8 to 11.7% and 20.0% greater at I 75 and I 50 , respectively”
t0“Corn”
Claim · model-written summary
WUE was 20.0% greater at I 50.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WUE was 9.8 to 11.7% and 20.0% greater at I 75 and I 50 , respectively”
t0“Corn”
Claim · model-written summary
Higher planting density increased yield and WUE at I 100 and I 75.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Greater PDe0
- Outcome
- yield and WUEe0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater PD resulted in greater yield and WUE at I 100 and I 75”
t0“Corn”
Claim · model-written summary
Planting density did not affect yield and WUE at I 50.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- PDe0
- Outcome
- yield and WUEe0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PD did not affect yield and WUE at I 50”
t0“Corn”
Claim · model-written summary
At 8.4 versus 5.9 plants m −2, yield and WUE were 6.3 to 8.3% greater.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 8.4 plants m −2e0
- Outcome
- Yield and WUEe0
- Direction
- greatere0
- Value
- 6.3 to 8.3%e0
- Comparator
- 5.9 plants m −2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and WUE in greater PD (8.4 plants m −2 ) were 6.3 to 8.3% greater than those in smaller PD (5.9 plants m −2 )”
t0“Corn”
The same questions in other papers
density · physiology: water · Zea mays (maize)Positive and negative results
23 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
24 papers more in this group
See all 28 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.