Abstract
Cotton ( Gossypium hirsutum L.) lint yields have not changed appreciably during the last decade. Because more and higher infestations of reniform nematodes ( Rotylenchulus reniformis ) have been identified in mid‐southern USA fields, this nematode might be a mitigating factor in the cotton yield stagnation. The objectives were to determine how varying rates of K fertilization interacted with different cotton genotypes to influence dry matter partitioning, lint yield, fiber quality, and reniform nematode populations. Nine cotton genotypes were grown in the field under two levels of K fertilization (0 and 112 kg K ha −1 ) and two levels of aldicarb [2‐methyl‐2‐(methylthio)propionaldehyde 0 ‐methylcarbamoyloxime] application (0 and 1.68 kg a.i. ha −1 ) from 1999 through 2001. Reniform nematode numbers and aboveground dry matter partitioning were determined at various times in the growing season. Lint yield, yield components, and fiber quality were determined at the end of the season. Cotton grown with K fertilization hosted a 12% larger post‐harvest population of reniform nematode than the unfertilized control plants. Plants grown without K fertilization averaged a 10% greater specific leaf weight than the K fertilized plants. Of the 9 genotypes grown, only PayMaster 1218BR increased lint yield (10%) in response to K fertilization. An interaction between aldicarb application and K fertilization for lint yield during the 2000 growing season indicated that both reniform nematode parasitism and insufficient K fertilization may impose limitations to lint yield production. Large reinform nematode populations may be suppressing the yield response to K fertilization. Production practices that encourage robust plant growth may enhance proliferation of existing reniform nematode populations.
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Claims 6
Claim · model-written summary
Potassium-fertilized cotton hosted a 12% larger post-harvest reniform nematode population than unfertilized plants.
- Taxon
- Cotton
Gossypium hirsutume0 - Treatment
- K fertilizatione0
- Interactor
- reniform nematodee0pest
- Outcome
- post‐harvest population of reniform nematodee0
- Direction
- largere0
- Value
- 12%e0
- Comparator
- unfertilized control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton grown with K fertilization hosted a 12% larger post‐harvest population of reniform nematode than the unfertilized control plants.”
Claim · model-written summary
Cotton without potassium fertilization had 10% greater specific leaf weight than fertilized plants.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- without K fertilizatione0
- Outcome
- specific leaf weighte0
- Direction
- greatere0
- Value
- 10%e0
- Comparator
- K fertilized plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown without K fertilization averaged a 10% greater specific leaf weight than the K fertilized plants.”
t0“Cotton”
Claim · model-written summary
Only PayMaster 1218BR among nine genotypes increased lint yield by 10% with potassium fertilization.
- Taxon
- CottonGossypium hirsutumt0
- Material
- PayMaster 1218BRe0
- Treatment
- K fertilizatione0
- Outcome
- lint yielde0
- Direction
- increasede0
- Value
- 10%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the 9 genotypes grown, only PayMaster 1218BR increased lint yield (10%) in response to K fertilization.”
t0“Cotton”
Claim · model-written summary
Aldicarb application interacted with potassium fertilization for cotton lint yield in 2000.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- aldicarb application and K fertilizatione0
- Outcome
- lint yielde0
- Qualifier
- 2000 growing seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An interaction between aldicarb application and K fertilization for lint yield during the 2000 growing season”
t0“Cotton”
Claim · model-written summary
Large reniform nematode populations may suppress cotton yield response to potassium fertilization.
- Taxon
- CottonGossypium hirsutumt0
- Interactor
- reinform nematodee0pest
- Outcome
- yield response to K fertilizatione0
- Direction
- suppressinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large reinform nematode populations may be suppressing the yield response to K fertilization.”
t0“Cotton”
Claim · model-written summary
Production practices encouraging robust cotton growth may enhance reniform nematode proliferation.
- Taxon
- CottonGossypium hirsutumt0
- Interactor
- reniform nematodee0pest
- Outcome
- proliferation of existing reniform nematode populationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Production practices that encourage robust plant growth may enhance proliferation of existing reniform nematode populations.”
t0“Cotton”
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