Abstract
Field experiments were performed in two successive seasons at the Experimental Station, Faculty of Agriculture, Cairo University, Giza, Egypt, on the Egyptian cotton cultivar Giza 75 (Gossypium barhadense L.). Cotton plants were sprayed with the growth regulator 1-naphthalene acetic acid (NAA) once (90 days after planting (DAP)), or twice (90 and 105 DAP) or three times (90, 105 and 120 DAP), during the square and boiling stage). The concentrations 5, 10, 15, 20 or 25 ppm were used. The volume of solution was the same for all treatments, 960 Lha -1 . The control plants were sprayed with water only. The effect of the previous treatments on yield components, cotton yield and fibre properties was studied. The application of NAA increased the number of opened bolls/plant, boll weight, seed index, seed cot- ton yield/plant and seed cotton and lint yieldsha -1 . The most significant effects were obtained with the 15 and 20 ppm concentrations, when each was applied twice. Lint percentage, fibre length parameters and micronaire value were not significantly affected by NAA. Flat bundle strength was significantly affected by NAA but with no consistent trend. The application of NAA twice or three times tended to give the best results on yield components and cotton yield compared with a single application. The results of this study suggested that 20 ppm of NAA gave the best figures when applied twice on the Egyptian cotton plants. ( © Inra/Elsevier, Paris.) growth regulator / NAA-concentrations / cotton yield / fibre properties Rsum -Effet des concentrations de l'acide 1-naphtalne-actique et du nombre d'applications sur les composantes du rendement et les proprits des fibres du coton gyptien (Gossypium barbadense L.). Des essais sur le terrain ont t effectus durant deux saisons successives la station de recherches de la facult d'agronomie de l'univer-
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Claims 7
Claim · model-written summary
NAA increased opened bolls per plant, boll weight and seed index.
- Taxon
- Egyptian cotton
.jpg?width=60)
Gossypium barbadenset0 - Treatment
- NAAe0
- Outcome
- number of opened bolls/plant, boll weight, seed indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The application of NAA increased the number of opened bolls/plant, boll weight, seed index, seed cot- ton yield/plant and seed cotton and lint yieldsha -1 .”
t0“Egyptian cotton”
Claim · model-written summary
NAA increased seed cotton yield per plant and seed cotton and lint yields per hectare.
- Taxon
- Egyptian cottonGossypium barbadenset0
- Treatment
- NAAe0
- Outcome
- seed cot- ton yield/plant and seed cotton and lint yieldsha -1e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of NAA increased the number of opened bolls/plant, boll weight, seed index, seed cot- ton yield/plant and seed cotton and lint yieldsha -1 .”
t0“Egyptian cotton”
Claim · model-written summary
The 15 and 20 ppm NAA treatments applied twice gave the most significant effects.
- Taxon
- Egyptian cottonGossypium barbadenset0
- Treatment
- 15 and 20 ppm concentrationse0
- Outcome
- most significant effectse0
- Qualifier
- applied twicee0
- Comparator
- water onlye1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most significant effects were obtained with the 15 and 20 ppm concentrations, when each was applied twice.”
t0“Egyptian cotton”
e1“The control plants were sprayed with water only.”
Claim · model-written summary
NAA did not significantly affect lint percentage, fibre length parameters or micronaire value.
- Taxon
- Egyptian cottonGossypium barbadenset0
- Treatment
- NAAe0
- Outcome
- Lint percentage, fibre length parameters and micronaire valuee0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lint percentage, fibre length parameters and micronaire value were not significantly affected by NAA.”
t0“Egyptian cotton”
Claim · model-written summary
NAA significantly affected flat bundle strength, without a consistent trend.
- Taxon
- Egyptian cottonGossypium barbadenset0
- Treatment
- NAAe0
- Outcome
- Flat bundle strengthe0
- Qualifier
- no consistent trende0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flat bundle strength was significantly affected by NAA but with no consistent trend.”
t0“Egyptian cotton”
Claim · model-written summary
Two or three NAA applications tended to give the best yield-component and cotton-yield results versus one application.
- Taxon
- Egyptian cottonGossypium barbadenset0
- Treatment
- NAA twice or three timese0
- Outcome
- yield components and cotton yielde0
- Direction
- beste0
- Comparator
- a single applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of NAA twice or three times tended to give the best results on yield components and cotton yield compared with a single application.”
t0“Egyptian cotton”
Claim · model-written summary
The authors suggested 20 ppm NAA applied twice for Egyptian cotton.
- Taxon
- Egyptian cottonGossypium barbadensee0
- Outcome
- 20 ppm of NAA gave the best figures when applied twicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results of this study suggested that 20 ppm of NAA gave the best figures when applied twice on the Egyptian cotton plants.”
The same questions in other papers
1-naphthaleneacetic acid · quality: grain · Gossypium barbadense (Egyptian cotton)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1-naphthaleneacetic acid · yield · Gossypium barbadense (Egyptian cotton)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.