Abstract
The present study was carried out at the Experimental Farm of Mallawi Agric. Res. Station , Minia, in 2005 and 2006 seasons, to investigate the responses of cotton cultivar Giza 83 grown in upper Egypt to some foliar treatments of ascorbic acid (vitamin C) and citric acid , both were applied twice , at the start and peak of flowering, at the concentrations of 250 , 500 and 1000 ppm, using tap water as control. The obtained results could be summarized as follows : Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids , plant height, number of open bolls /plant and seed cotton yield in both seasons, numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season, and it decreased fruit shedding % in 2005 season only in comparison with the control. Similar trend was obtained by 1000 ppm AA but the differences with the control were not always significant, and it significantly decreased earliness % in both seasons. The concentration of 250 ppm AA significantly increased leaves content of chlorophyll b and plant height in 2006 season only. Citric acid (CA) at the concentrations of 500 and 1000 ppm significantly increased leaves content of chlorophyll a , number of open bolls /plant in the two seasons , plant growth parameters and boll weight in 2006 season, and seed cotton yield in 2005 season. Only 1000 ppm CA significantly increased seed cotton yield and decreased fruit shedding % in the two seasons, while 250 ppm CA exerted no significant effects on all studied traits in both seasons. It could be concluded from results of this study that most used treatments of ascorbic acid and citric acid improved growth and fruiting performance of cotton plants grown under the naturally occurring climatic conditions of upper Egypt, however, the most consistently positive effects and the best results in general were obtained by spraying ascorbic acid at the concentration of 500 ppm or citric acid at the concentration of 1000 ppm.
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Claims 15
Claim · model-written summary
At 500 ppm, ascorbic acid significantly increased cotton leaf pigments in both seasons.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- ascorbic acid (AA) at the concentration of 500 ppme0
- Outcome
- leaves content of chlorophyll a, b and carotenoidse0
- Direction
- increasese0
- Comparator
- controle1
- Setting
- UPPER EGYPTt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids”
e1“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 500 ppm, ascorbic acid significantly increased plant height and open bolls in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- ascorbic acide1
- Outcome
- plant height, number of open bolls /plante0
- Direction
- increasese1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height, number of open bolls /plant and seed cotton yield in both seasons”
e1“Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids , plant height, number of open bolls /plant and seed cotton yield in both seasons, numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season, and it decreased fruit shedding % in 2005 season only in comparison with the control.”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 500 ppm, ascorbic acid significantly increased seed cotton yield in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- ascorbic acide1
- Outcome
- seed cotton yielde0
- Direction
- increasese1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed cotton yield in both seasons”
e1“Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids , plant height, number of open bolls /plant and seed cotton yield in both seasons, numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season, and it decreased fruit shedding % in 2005 season only in comparison with the control.”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 500 ppm, ascorbic acid increased nodes, fruiting branches and boll weight in 2006.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- ascorbic acide1
- Outcome
- numbers of main stem nodes and fruiting branches /plant and boll weighte0
- Direction
- increasese1
- Qualifier
- 2006 seasone0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season”
e1“Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids , plant height, number of open bolls /plant and seed cotton yield in both seasons, numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season, and it decreased fruit shedding % in 2005 season only in comparison with the control.”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 500 ppm, ascorbic acid reduced fruit shedding in 2005.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- ascorbic acide1
- Outcome
- fruit shedding %e0
- Direction
- decreasede0
- Qualifier
- 2005 season onlye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it decreased fruit shedding % in 2005 season only in comparison with the control”
e1“Foliar application of ascorbic acid (AA) at the concentration of 500 ppm resulted in significant increases in leaves content of chlorophyll a, b and carotenoids , plant height, number of open bolls /plant and seed cotton yield in both seasons, numbers of main stem nodes and fruiting branches /plant and boll weight in 2006 season, and it decreased fruit shedding % in 2005 season only in comparison with the control.”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 1000 ppm, ascorbic acid showed a similar trend, with some comparisons nonsignificant.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1000 ppm AAe0
- Outcome
- Similar trende0
- Qualifier
- not always significante0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar trend was obtained by 1000 ppm AA but the differences with the control were not always significant”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 1000 ppm, ascorbic acid significantly reduced earliness in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1000 ppm AAe1
- Outcome
- earliness %e0
- Direction
- decreasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it significantly decreased earliness % in both seasons”
e1“Similar trend was obtained by 1000 ppm AA but the differences with the control were not always significant”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 250 ppm, ascorbic acid significantly increased chlorophyll b and plant height in 2006.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 250 ppm AAe0
- Outcome
- leaves content of chlorophyll b and plant heighte0
- Direction
- increasede0
- Qualifier
- 2006 season onlye0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of 250 ppm AA significantly increased leaves content of chlorophyll b and plant height in 2006 season only”
e1“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
Citric acid at 500 and 1000 ppm increased chlorophyll a and open bolls in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- Citric acid (CA) at the concentrations of 500 and 1000 ppme0
- Outcome
- leaves content of chlorophyll a , number of open bolls /plante0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citric acid (CA) at the concentrations of 500 and 1000 ppm significantly increased leaves content of chlorophyll a , number of open bolls /plant in the two seasons”
e1“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
Citric acid at 500 and 1000 ppm increased growth parameters and boll weight in 2006.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- Citric acid (CA) at the concentrations of 500 and 1000 ppme1
- Outcome
- plant growth parameters and boll weighte0
- Direction
- increasede1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant growth parameters and boll weight in 2006 season”
e1“Citric acid (CA) at the concentrations of 500 and 1000 ppm significantly increased leaves content of chlorophyll a , number of open bolls /plant in the two seasons , plant growth parameters and boll weight in 2006 season, and seed cotton yield in 2005 season.”
e2“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
Citric acid at 500 and 1000 ppm increased seed cotton yield in 2005.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- Citric acid (CA) at the concentrations of 500 and 1000 ppme1
- Outcome
- seed cotton yielde0
- Direction
- increasede1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed cotton yield in 2005 season”
e1“Citric acid (CA) at the concentrations of 500 and 1000 ppm significantly increased leaves content of chlorophyll a , number of open bolls /plant in the two seasons , plant growth parameters and boll weight in 2006 season, and seed cotton yield in 2005 season.”
e2“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 1000 ppm, citric acid significantly increased seed cotton yield in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1000 ppm CAe0
- Outcome
- seed cotton yielde0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only 1000 ppm CA significantly increased seed cotton yield”
e1“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 1000 ppm, citric acid significantly reduced fruit shedding in both seasons.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1000 ppm CAe1
- Outcome
- fruit shedding %e0
- Direction
- decreasede0
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased fruit shedding % in the two seasons”
e1“Only 1000 ppm CA significantly increased seed cotton yield and decreased fruit shedding % in the two seasons”
e2“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
At 250 ppm, citric acid had no significant effects on studied traits.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 250 ppm CAe0
- Outcome
- all studied traitse0
- Direction
- no significant effectse0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“250 ppm CA exerted no significant effects on all studied traits in both seasons”
e1“in comparison with the control”
t0“COTTON GROWN IN UPPER EGYPT”
Claim · model-written summary
Authors favored 500 ppm ascorbic acid or 1000 ppm citric acid for cotton performance.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- spraying ascorbic acid at the concentration of 500 ppm or citric acid at the concentration of 1000 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most consistently positive effects and the best results in general were obtained by spraying ascorbic acid at the concentration of 500 ppm or citric acid at the concentration of 1000 ppm”
t0“COTTON GROWN IN UPPER EGYPT”
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