Abstract
Widespread potassium (K) deficiencies in cotton ( Gossypium hirsutum L.) have been documented throughout cotton producing countries. Potassium fertilizer is needed for high production of cotton yield. This study was conducted to determine whether K fertilizer management can improve efficiency of K nutrition in cotton. The effects of K source, rate, and application timing on yield and K use efficiency of cotton were investigated under conditions of cotton‐stalk recycling to the field in the North China Plain (NCP). The results showed that there was no significant difference in yield between K sources of K 2 SO 4 and KCl. However, we found that the low rate produced a 2 to 4% higher K agronomic efficiency (AEK) and a 12 to 93% higher K apparent recovery efficiency (REK) than the other rates, although there was little difference in yield among different K rates (45, 90, and 180 kg K 2 O ha −1 ). In addition, our results of application timing showed that the later split application at peak bloom acquired the highest lint yield as well as a 35 to 103% higher AEK and 23 to 58% higher REK than the earlier split application at peak squaring and full dose at preplanting. In conclusion, KCl should be the preferred K source because of its lower cost and fair effect on yield compared with K 2 SO 4 . The 45 kg K 2 O ha −1 of K rates is adequate for cotton in the NCP. The later split application of K at peak bloom is the best timing of K fertilizer for cotton yield and K use efficiency.
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Claims 10
Claim · model-written summary
Cotton yield did not differ significantly between potassium sulfate and potassium chloride.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- K 2 SO 4 and KCle0
- Outcome
- yielde0
- Direction
- no significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant difference in yield between K sources of K 2 SO 4 and KCl”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
The low potassium rate gave 2 to 4% higher agronomic efficiency than other rates.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low ratee0
- Outcome
- K agronomic efficiency (AEK)e0
- Direction
- highere0
- Value
- 2 to 4%e0
- Comparator
- other ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low rate produced a 2 to 4% higher K agronomic efficiency (AEK) and a 12 to 93% higher K apparent recovery efficiency (REK) than the other rates”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
The low potassium rate gave 12 to 93% higher apparent recovery efficiency than other rates.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- low ratee0
- Outcome
- K apparent recovery efficiency (REK)e0
- Direction
- highere0
- Value
- 12 to 93%e0
- Comparator
- other ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the low rate produced a 2 to 4% higher K agronomic efficiency (AEK) and a 12 to 93% higher K apparent recovery efficiency (REK) than the other rates”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton yield differed little among the three potassium rates.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- different K rates (45, 90, and 180 kg K 2 O ha −1 )e0
- Outcome
- yielde0
- Direction
- little differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was little difference in yield among different K rates (45, 90, and 180 kg K 2 O ha −1 )”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
A later split application at peak bloom gave the highest lint yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- later split application at peak bloome0
- Outcome
- lint yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the later split application at peak bloom acquired the highest lint yield”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Later peak-bloom splitting raised agronomic efficiency by 35 to 103% versus earlier splitting or preplant application.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- later split application at peak bloome0
- Outcome
- AEKe0
- Direction
- highere0
- Value
- 35 to 103%e0
- Comparator
- earlier split application at peak squaring and full dose at preplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the later split application at peak bloom acquired the highest lint yield as well as a 35 to 103% higher AEK and 23 to 58% higher REK than the earlier split application at peak squaring and full dose at preplanting”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Later peak-bloom splitting raised apparent recovery efficiency by 23 to 58% versus earlier splitting or preplant application.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- later split application at peak bloome0
- Outcome
- REKe0
- Direction
- highere0
- Value
- 23 to 58%e0
- Comparator
- earlier split application at peak squaring and full dose at preplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the later split application at peak bloom acquired the highest lint yield as well as a 35 to 103% higher AEK and 23 to 58% higher REK than the earlier split application at peak squaring and full dose at preplanting”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
The authors prefer KCl because it costs less and gives comparable yield.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- KCl should be the preferred K sourcee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCl should be the preferred K source because of its lower cost and fair effect on yield compared with K 2 SO 4”
e1“in cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
The authors consider 45 kg K2O per hectare adequate for cotton in the North China Plain.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- 45 kg K 2 O ha −1 of K rates is adequatee0
- Setting
- NCPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 45 kg K 2 O ha −1 of K rates is adequate for cotton in the NCP”
Claim · model-written summary
The authors recommend later peak-bloom splitting for cotton yield and potassium efficiency.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- later split application of K at peak bloom is the best timinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The later split application of K at peak bloom is the best timing of K fertilizer for cotton yield and K use efficiency”
The same questions in other papers
potassium · yield · Gossypium hirsutum (cotton)Results differ
10 papers in the same direction as this paper · 86 in the opposite direction
- positive
- positive
- positive
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See all 97 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.