Abstract
Nitrogen (N) supply during boll setting and maturation period of cotton can be critical in determining fiber quality. The study aims to investigate the relationship between N rates and formation of fiber length, strength, maturity and micronaire in bolls with different flowering dates. Field experiments were conducted using two cotton cultivars (Kemian 1 and NuCOTN 33B) and three N fertilization rates (0, 240, and 480 kg N ha-1) in Nanjing and Xuzhou in 2005 and in Anyang in 2007, China. The fiber length, strength, maturity, micronaire, and N concentration per unit area (NA) of the subtending leaf of cotton boll were analyzed. N fertilization rates, flowering dates, and N fertilization rates × flowering dates significantly (P ≤ 0.05) affected NA and the formation of fiber length, strength, maturity and micronaire. N fertilization rates affected fiber quality by influencing NA which was significantly related to rate and duration of the fiber quality formation process. The optimal NA for fiber quality formation was varied. For bolls flowering before August 25, when mean daily temperature during boll maturation period (MDTBMP) was higher than 21°C, NA in the 240 kg N ha-1 treatment was optimal for fiber length, fiber strength, maturity, and micronaire formation. For bolls flowering after September 10 when MDTBMP was lower than 21°C, NA in the 480 kg N ha-1 treatment was optimal for fiber quality development. Higher N application rate can sustain a higher NA level in its subtending leaf, leading to the less decrease magnitude of fiber length, strength, maturity, micronaire in late flowering dates. 240 kg N ha-1 is the recommended N application strategy for optimal quality, but we could diminish the negative influence of climate stress on fiber quality by supplemented N fertilizer in later flowering season.
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Claims 10
Claim · model-written summary
N fertilization rates significantly affected cotton fiber quality.
- Taxon
- Gossypium Hirsutum
Gossypium hirsutumt0 - Material
- Kemian 1 and NuCOTN 33Be1
- Treatment
- N fertilization rates (0, 240, and 480 kg N ha-1)e1
- Outcome
- fiber qualitye2
- Setting
- Nanjing and Xuzhou in 2005 and in Anyang in 2007, Chinae1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e1“Field experiments were conducted using two cotton cultivars (Kemian 1 and NuCOTN 33B) and three N fertilization rates (0, 240, and 480 kg N ha-1) in Nanjing and Xuzhou in 2005 and in Anyang in 2007, China”
e2“N fertilization rates affected fiber quality by influencing NA which was significantly related to rate and duration of the fiber quality formation process”
Claim · model-written summary
Flowering dates significantly affected cotton fiber quality.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- flowering datese3
- Outcome
- fiber qualitye2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e2“N fertilization rates affected fiber quality by influencing NA which was significantly related to rate and duration of the fiber quality formation process”
e3“N fertilization rates, flowering dates, and N fertilization rates × flowering dates significantly (P ≤ 0.05) affected NA and the formation of fiber length, strength, maturity and micronaire”
Claim · model-written summary
The N rate by flowering date interaction significantly affected NA.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- N fertilization rates × flowering datese3
- Outcome
- NAe3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e3“N fertilization rates, flowering dates, and N fertilization rates × flowering dates significantly (P ≤ 0.05) affected NA and the formation of fiber length, strength, maturity and micronaire”
Claim · model-written summary
N fertilization rates significantly affected NA.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- N fertilization ratese3
- Outcome
- NAe3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e3“N fertilization rates, flowering dates, and N fertilization rates × flowering dates significantly (P ≤ 0.05) affected NA and the formation of fiber length, strength, maturity and micronaire”
Claim · model-written summary
For bolls flowering before August 25 at MDTBMP above 21°C, 240 kg N ha-1 gave the optimal NA for fiber quality formation.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- 240 kg N ha-1e4
- Outcome
- NAe4
- Direction
- optimale4
- Qualifier
- for fiber length, fiber strength, maturity, and micronaire formatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e4“NA in the 240 kg N ha-1 treatment was optimal for fiber length, fiber strength, maturity, and micronaire formation”
Claim · model-written summary
For bolls flowering after September 10 at MDTBMP below 21°C, 480 kg N ha-1 gave the optimal NA for fiber quality development.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- 480 kg N ha-1e5
- Outcome
- NAe5
- Direction
- optimale5
- Qualifier
- for fiber quality developmente5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e5“NA in the 480 kg N ha-1 treatment was optimal for fiber quality development”
Claim · model-written summary
A higher N application rate gave a higher NA level in the subtending leaf.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- Higher N application ratee6
- Outcome
- NA levele6
- Direction
- highere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e6“Higher N application rate can sustain a higher NA level in its subtending leaf, leading to the less decrease magnitude of fiber length, strength, maturity, micronaire in late flowering dates”
Claim · model-written summary
A higher N application rate gave a smaller decrease in fiber quality in late flowering dates.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- Higher N application ratee6
- Outcome
- fiber qualitye2
- Direction
- less decreasee6
- Qualifier
- in late flowering datese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e2“N fertilization rates affected fiber quality by influencing NA which was significantly related to rate and duration of the fiber quality formation process”
e6“Higher N application rate can sustain a higher NA level in its subtending leaf, leading to the less decrease magnitude of fiber length, strength, maturity, micronaire in late flowering dates”
Claim · model-written summary
240 kg N ha-1 is the recommended N application strategy for optimal cotton quality.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- 240 kg N ha-1e7
- Outcome
- optimal qualitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e7“240 kg N ha-1 is the recommended N application strategy for optimal quality”
Claim · model-written summary
Supplemental N fertilizer could diminish the negative influence of climate stress on fiber quality in later flowering.
- Taxon
- Gossypium HirsutumGossypium hirsutumt0
- Treatment
- supplemented N fertilizere1
- Outcome
- negative influence of climate stress on fiber qualitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton (Gossypium Hirsutum L.)”
e1“we could diminish the negative influence of climate stress on fiber quality by supplemented N fertilizer in later flowering season”
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70 papers in the same direction as this paper · 6 in the opposite direction · 2 reporting no difference from an alternative
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See all 79 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.