Abstract
Abstract Background An optimal N rate is one of the basic determinants for high cotton yield. The purpose of this study was to determine the optimal N rate on a new cotton cropping pattern with late-sowing, high density and one-time fertilization at the first flower period in Yangtze River Valley, China. A 2-year experiment was conducted in 2015 and 2016 with a randomized complete block design. The cotton growth process, yield, and biomass accumulation were examined. Results The results showed that N rates had no effect on cotton growing progress or periods. Cotton yield was increased with N rates increasing from 120 to 180 kg·hm −2 , while the yield was not increased when the N rate was beyond 180 kg·hm −2 , or even decreased (9∼29%). Cotton had the highest biomass at the N rate of 180 kg·hm −2 is due to its highest accumulation speed during the fast accumulation period. Conclusions The result suggests that the N rate for cotton could be reduced further to be 180 kg·hm − 2 under the new cropping pattern in the Yangtze River Valley, China.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Nitrogen rates did not affect cotton growing progress or periods.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- N ratese0
- Outcome
- cotton growing progress or periodse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N rates had no effect on cotton growing progress or periods”
t0“Cotton”
Claim · model-written summary
Cotton yield rose as nitrogen increased from 120 to 180 kg·hm −2.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- N ratese0
- Outcome
- Cotton yielde0
- Direction
- increasede0
- Value
- 120 to 180 kg·hm −2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield was increased with N rates increasing from 120 to 180 kg·hm −2”
Claim · model-written summary
Beyond 180 kg·hm −2, nitrogen did not raise and sometimes decreased cotton yield by 9∼29%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield was not increased when the N rate was beyond 180 kg·hm −2 , or even decreased (9∼29%)”
t0“Cotton”
Claim · model-written summary
Cotton had its highest biomass at 180 kg·hm −2 nitrogen.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- N rate of 180 kg·hm −2e0
- Outcome
- biomasse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton had the highest biomass at the N rate of 180 kg·hm −2”
Claim · model-written summary
The highest biomass at 180 kg·hm −2 was attributed to the highest accumulation speed during fast accumulation.
- Taxon
- CottonGossypium hirsutume0
- Outcome
- biomasse0
- Qualifier
- highest accumulation speed during the fast accumulation periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton had the highest biomass at the N rate of 180 kg·hm −2 is due to its highest accumulation speed during the fast accumulation period”
Claim · model-written summary
The authors recommend 180 kg·hm − 2 nitrogen for this cotton cropping pattern.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- N rate for cotton could be reduced further to be 180 kg·hm − 2e0
- Value
- 180 kg·hm − 2e0
- Setting
- Yangtze River Valley, Chinae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the N rate for cotton could be reduced further to be 180 kg·hm − 2 under the new cropping pattern in the Yangtze River Valley, China”
The same questions in other papers
nitrogen · organism · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 papers →nitrogen · growth · Gossypium hirsutum (cotton)Positive and negative results
128 papers in the same direction as this paper · 21 in the opposite direction · 3 reporting no difference from an alternative
- positive
- positive
- negative
149 papers more in this group
See all 153 papers →nitrogen · yield · Gossypium hirsutum (cotton)Positive and negative results
285 papers in the same direction as this paper · 53 in the opposite direction · 4 reporting no difference from an alternative
- no effect
- no effect
- positive
339 papers more in this group
See all 343 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.