Abstract
To test the hypothesis that stay-green genotypes help to increase stalk lodging resistance under high planting density by reducing dry matter remobilization from stalk, a two-year field study with three planting densities (60,000, 75,000, and 90,000 plants per ha) and six hybrids was conducted. When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%. Stem dry weight per length, rind penetration strength, average crushing strength for the first to fifth internode, and average bending strength for the third to fifth internode decreased by 25.4–47.2%, 5.1–24.6%, 1.4–29.9%, and 14.0–36.0%, respectively. Stalk lodging rate increased by 17–275%. Stalk dry matter remobilization efficiency was negatively correlated to either stem dry weight per length (r = 0.23, p < 0.05), rind penetration strength (r = 0.75, p < 0.01), crushing strength (r = 0.61, p < 0.01), or bending strength (r = 0.32, p < 0.01). Cultivars with higher stay-green degree (SR999, LY99, and NH101) had lower stalk lodging rate compared to the senescent cultivars XY335 and LY918. It is concluded that stay-green genotypes with low dry matter remobilization help to strengthen stem and reduce stalk lodging risk.
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Claims 9
Claim · model-written summary
Raising planting density from 75,000 to 90,000 increased stalk dry matter remobilization efficiency by 4.1–191% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- stalk dry matter remobilization efficiencye1
- Direction
- increasede1
- Value
- 4.1–191%e1
- Comparator
- 75,000e1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
Claim · model-written summary
Raising planting density from 75,000 to 90,000 decreased stem dry weight per length by 25.4–47.2% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- Stem dry weight per lengthe2
- Direction
- decreasede2
- Value
- 25.4–47.2%e2
- Comparator
- 75,000e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
e2“Stem dry weight per length, rind penetration strength, average crushing strength for the first to fifth internode, and average bending strength for the third to fifth internode decreased by 25.4–47.2%, 5.1–24.6%, 1.4–29.9%, and 14.0–36.0%, respectively”
Claim · model-written summary
Raising planting density from 75,000 to 90,000 decreased rind penetration strength by 5.1–24.6% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- rind penetration strengthe2
- Direction
- decreasede2
- Value
- 5.1–24.6%e2
- Comparator
- 75,000e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
e2“Stem dry weight per length, rind penetration strength, average crushing strength for the first to fifth internode, and average bending strength for the third to fifth internode decreased by 25.4–47.2%, 5.1–24.6%, 1.4–29.9%, and 14.0–36.0%, respectively”
Claim · model-written summary
Raising planting density from 75,000 to 90,000 decreased average crushing strength for the first to fifth internode by 1.4–29.9% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- average crushing strength for the first to fifth internodee2
- Direction
- decreasede2
- Value
- 1.4–29.9%e2
- Comparator
- 75,000e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
e2“Stem dry weight per length, rind penetration strength, average crushing strength for the first to fifth internode, and average bending strength for the third to fifth internode decreased by 25.4–47.2%, 5.1–24.6%, 1.4–29.9%, and 14.0–36.0%, respectively”
Claim · model-written summary
Raising planting density from 75,000 to 90,000 decreased average bending strength for the third to fifth internode by 14.0–36.0% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- average bending strength for the third to fifth internodee2
- Direction
- decreasede2
- Value
- 14.0–36.0%e2
- Comparator
- 75,000e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
e2“Stem dry weight per length, rind penetration strength, average crushing strength for the first to fifth internode, and average bending strength for the third to fifth internode decreased by 25.4–47.2%, 5.1–24.6%, 1.4–29.9%, and 14.0–36.0%, respectively”
Claim · model-written summary
Raising planting density from 75,000 to 90,000 increased stalk lodging rate by 17–275% in maize.
- Treatment
- planting density changed from 75,000 to 90,000e1
- Outcome
- Stalk lodging ratee3
- Direction
- increasede3
- Value
- 17–275%e3
- Comparator
- 75,000e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e1“When planting density changed from 75,000 to 90,000, stalk dry matter remobilization efficiency increased by 4.1–191%”
e3“Stalk lodging rate increased by 17–275%”
Claim · model-written summary
Stalk dry matter remobilization efficiency was negatively correlated with stem dry weight per length, rind penetration strength, crushing strength and bending strength in maize.
- Organ / stage
- stalke4
- Outcome
- Stalk dry matter remobilization efficiencye4
- Direction
- negatively correlatede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e4“Stalk dry matter remobilization efficiency was negatively correlated to either stem dry weight per length (r = 0.23, p < 0.05), rind penetration strength (r = 0.75, p < 0.01), crushing strength (r = 0.61, p < 0.01), or bending strength (r = 0.32, p < 0.01)”
Claim · model-written summary
Stay-green cultivars SR999, LY99 and NH101 had lower stalk lodging rate than the senescent cultivars XY335 and LY918 in maize.
- Material
- SR999, LY99, and NH101e5
- Outcome
- stalk lodging ratee5
- Direction
- lowere5
- Comparator
- senescent cultivars XY335 and LY918e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e5“Cultivars with higher stay-green degree (SR999, LY99, and NH101) had lower stalk lodging rate compared to the senescent cultivars XY335 and LY918”
Claim · model-written summary
Stay-green genotypes with low dry matter remobilization are concluded to strengthen stem and reduce stalk lodging risk in maize.
- Outcome
- reduce stalk lodging riske6
- Qualifier
- stay-green genotypes with low dry matter remobilization help to strengthen steme6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stalk lodging in maize genotypes”
e6“stay-green genotypes with low dry matter remobilization help to strengthen stem and reduce stalk lodging risk”
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density · growth · Zea mays (maize)Positive and negative results
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