Abstract
The number of cotton plants grown per unit of ground area has gained attention due to the high prices of inputs and lower production. Cotton yield per unit of area in Henan province has been stagnant in the last few years. The objectives of this study were to investigate cotton growth, yield, boll spatial distribution and biomass accumulation using different plant densities at cultivation and to find out the optimal plant density. A 2-year field experiment was conducted in a randomized complete block design under six plant densities (D1, 15,000; D2, 33,000; D3, 51,000; D4, 69,000; D5, 87,000 and D6, 105,000 ha−1). Cotton grown at lower plant density produced taller plants and high number of leaves per plant while greater number of branches, fruiting nodes and high number of bolls per unit of ground area were produced under high plant density. Boll retention rate decreased as plant population increased and at nodes 1–8 the rate decreased slowly and then increased dramatically. The highest seed cotton yield (4546 kg ha−1) and lint yield (1682 kg ha−1) was produced by D5. The seed cotton and lint yield produced by D5 were 51–55%, 40–37%, 22–26%, 11–15%, 12–15%, 28–30%, 21–24%, 15–20%, 7–13% and 13–17% higher than D1, D2, D3, D4 and D6 during both years of experimentation, respectively. The increase in seed yield was due to higher biomass accumulation in reproductive organs under D5 plant density. The highest average (110.4 VA kg ha−1 d−1) and maximum (126 VM kg ha−1 d−1) rate of reproductive organs biomass was also accumulated by D5 as compared to other plant densities. The results suggest that D5 is the optimal plant density for high reproductive biomass accumulation and high yield for the area of Henan province.
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Claims 10
Claim · model-written summary
Lower density produced taller cotton plants and more leaves per plant.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- lower plant densitye0
- Outcome
- taller plants and high number of leaves per plante0
- Direction
- tallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton grown at lower plant density produced taller plants and high number of leaves per plant”
t0“Cotton”
Claim · model-written summary
High density produced more branches, fruiting nodes and bolls per area.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- high plant densitye0
- Outcome
- number of branches, fruiting nodes and high number of bolls per unit of ground areae0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater number of branches, fruiting nodes and high number of bolls per unit of ground area were produced under high plant density”
t0“Cotton”
Claim · model-written summary
Boll retention decreased with population increase.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- plant populatione0
- Outcome
- Boll retention ratee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Boll retention rate decreased as plant population increased”
t0“Cotton”
Claim · model-written summary
At nodes 1–8 the boll retention rate decreased slowly and then increased dramatically.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- nodes 1–8e0
- Outcome
- the ratee0
- Direction
- decreased slowly and then increased dramaticallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at nodes 1–8 the rate decreased slowly and then increased dramatically”
t0“Cotton”
Claim · model-written summary
D5 produced the highest seed cotton yield, 4546 kg ha−1.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- D5e0
- Outcome
- seed cotton yielde0
- Direction
- higheste0
- Value
- 4546 kg ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest seed cotton yield (4546 kg ha−1) and lint yield (1682 kg ha−1) was produced by D5”
t0“Cotton”
Claim · model-written summary
D5 produced the highest lint yield, 1682 kg ha−1.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- D5e0
- Outcome
- lint yielde0
- Direction
- higheste0
- Value
- 1682 kg ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest seed cotton yield (4546 kg ha−1) and lint yield (1682 kg ha−1) was produced by D5”
t0“Cotton”
Claim · model-written summary
D5 accumulated the highest average reproductive organ biomass rate.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- D5e0
- Outcome
- averagee0
- Direction
- higheste0
- Value
- 110.4 VA kg ha−1 d−1e0
- Comparator
- other plant densitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average (110.4 VA kg ha−1 d−1) and maximum (126 VM kg ha−1 d−1) rate of reproductive organs biomass was also accumulated by D5 as compared to other plant densities”
t0“Cotton”
Claim · model-written summary
D5 accumulated the highest maximum reproductive organ biomass rate.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- D5e0
- Outcome
- maximume0
- Direction
- higheste0
- Value
- 126 VM kg ha−1 d−1e0
- Comparator
- other plant densitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average (110.4 VA kg ha−1 d−1) and maximum (126 VM kg ha−1 d−1) rate of reproductive organs biomass was also accumulated by D5 as compared to other plant densities”
t0“Cotton”
Claim · model-written summary
Higher reproductive organ biomass accumulation under D5 explained increased seed yield.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- reproductive organse0
- Treatment
- D5 plant densitye0
- Outcome
- increase in seed yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in seed yield was due to higher biomass accumulation in reproductive organs under D5 plant density”
t0“Cotton”
Claim · model-written summary
The authors identify D5 as optimal for reproductive biomass and yield in Henan.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- D5e0
- Outcome
- optimal plant densitye0
- Setting
- Henan provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“D5 is the optimal plant density for high reproductive biomass accumulation and high yield for the area of Henan province”
t0“Cotton”
The same questions in other papers
density · yield · Gossypium hirsutum (cotton)Positive and negative results
129 papers in the same direction as this paper · 38 in the opposite direction · 3 reporting no difference from an alternative
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- positive
- positive
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