Abstract
Within‐season measurements of cotton ( Gossypium hirsutum L.) growth and development in response to moisture deficit stress can provide insight into how management practices impact plant health and yield. The objectives were to investigate responses of leaf area index (LAI), normalized difference vegetation index (NDVI), normalized difference water index (NDWI), and crop water stress index (CWSI) and their relation to the lint yield of four cotton cultivars (PHY499, DP1044, PHY375, and FM9170) grown under various irrigation levels for two consecutive growing seasons at Chillicothe, TX. Plants exposed to water stress showed significant LAI, NDVI, and NDWI decrease and CWSI increase compared with well‐watered plants. The NDVI reached a plateau value of 0.89 at 82 d after planting (DAP), while NDWI increased steadily to the end of the growing seasons for the high irrigation level. The high irrigation level had the greatest lint yield of 1670 and 1846 kg ha −1 in 2013 and 2014, respectively. Fiber length, strength, and micronaire showed significant differences among irrigation levels. Compared with dryland, an average 8% increase in fiber length and strength and 10% decrease in micronaire were observed by the high irrigation level. High positive correlations of LAI, NDVI, and NDWI with lint yield were observed in both years. The CWSI differentiated low vs. high irrigated plants and was negatively correlated with lint yield. The results indicated that these measurements at different growth stages are useful to detect growth and water status for cotton in the semiarid Texas Rolling Plains.
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Claims 13
Claim · model-written summary
Water stress significantly decreased cotton leaf area index relative to well-watered plants.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- water stresse0
- Outcome
- LAIe0
- Direction
- decreasee0
- Comparator
- well‐watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exposed to water stress showed significant LAI, NDVI, and NDWI decrease and CWSI increase compared with well‐watered plants”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Water stress significantly decreased cotton NDVI and NDWI relative to well-watered plants.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water stresse0
- Outcome
- NDVI, and NDWIe0
- Direction
- decreasee0
- Comparator
- well‐watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exposed to water stress showed significant LAI, NDVI, and NDWI decrease and CWSI increase compared with well‐watered plants”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Water stress significantly increased cotton CWSI relative to well-watered plants.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water stresse0
- Outcome
- CWSIe0
- Direction
- increasee0
- Comparator
- well‐watered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants exposed to water stress showed significant LAI, NDVI, and NDWI decrease and CWSI increase compared with well‐watered plants”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton NDVI plateaued at 0.89 at 82 days after planting.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- NDVIe0
- Direction
- plateaue0
- Value
- 0.89e0
- Qualifier
- 82 d after planting (DAP)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NDVI reached a plateau value of 0.89 at 82 d after planting (DAP)”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Under high irrigation, cotton NDWI rose steadily to the end of the growing seasons.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- high irrigation levele0
- Outcome
- NDWIe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NDWI increased steadily to the end of the growing seasons for the high irrigation level”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
High irrigation produced the greatest lint yield, 1670 kg ha −1 in 2013.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- high irrigation levele0
- Outcome
- lint yielde0
- Direction
- greateste0
- Value
- 1670e0
- Qualifier
- 2013e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The high irrigation level had the greatest lint yield of 1670 and 1846 kg ha −1 in 2013 and 2014, respectively”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
High irrigation produced the greatest lint yield, 1846 kg ha −1 in 2014.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- high irrigation levele0
- Outcome
- lint yielde0
- Direction
- greateste0
- Value
- 1846 kg ha −1e0
- Qualifier
- 2014e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The high irrigation level had the greatest lint yield of 1670 and 1846 kg ha −1 in 2013 and 2014, respectively”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Fiber length, strength and micronaire differed significantly among irrigation levels.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- irrigation levelse0
- Outcome
- Fiber length, strength, and micronairee0
- Direction
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fiber length, strength, and micronaire showed significant differences among irrigation levels”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
High irrigation increased fiber length and strength by an average 8% compared with dryland.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- high irrigation levele0
- Outcome
- fiber length and strengthe0
- Direction
- increasee0
- Value
- 8%e0
- Comparator
- drylande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with dryland, an average 8% increase in fiber length and strength and 10% decrease in micronaire were observed by the high irrigation level”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
High irrigation decreased micronaire by 10% compared with dryland.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- high irrigation levele0
- Outcome
- micronairee0
- Direction
- decreasee0
- Value
- 10%e0
- Comparator
- drylande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with dryland, an average 8% increase in fiber length and strength and 10% decrease in micronaire were observed by the high irrigation level”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
LAI, NDVI and NDWI were highly positively correlated with lint yield in both years.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- LAI, NDVI, and NDWIe0
- Outcome
- lint yielde0
- Direction
- positivee0
- Qualifier
- both yearse0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High positive correlations of LAI, NDVI, and NDWI with lint yield were observed in both years”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
CWSI distinguished low from high irrigation and correlated negatively with lint yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- CWSIe0
- Outcome
- lint yielde0
- Direction
- negativelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CWSI differentiated low vs. high irrigated plants and was negatively correlated with lint yield”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Growth-stage measurements were useful for detecting cotton growth and water status in the semiarid Texas Rolling Plains.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- detect growth and water statuse0
- Qualifier
- at different growth stagese0
- Setting
- semiarid Texas Rolling Plainse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these measurements at different growth stages are useful to detect growth and water status for cotton in the semiarid Texas Rolling Plains”
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